Tag Archives: cast iron foundry

High-strength gray iron factors that affect the performance of the gray iron

Posted on May 8, 2012 by admin

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Consistent with previous understanding: gray iron material properties depend on its chemical composition and cooling rate. Given shape, weight and wall thickness of the casting if the casting medium and pouring temperature is unchanged, the cooling rate is constant, and thus affect metal properties to the chemical composition for gray cast iron, the basic ingredients manganese, less impact on performance and available for regulation of the three elements of phosphorus, sulfur, and actual changes in the range of very narrow, apparently decided that the most important factor of the gray iron material properties of carbon and silicon content (alloying elements affect as an alternative treat the problem), if you find the two-element content (two elements can also be combined to the representative of the carbon equivalent) and the characterization of material properties of gray iron the mathematical relationship between the strength and hardness, which not only bring to trial study convenient at the same time will also be the producer of practical value. There is also an issue has been a cause for concern – internal combustion engines, most of its artifacts are gray iron, its main components such as cylinder block processing capacity, many processes, and use of specialized equipment and tools, while the special tool Therefore, even in the United States and Europe, the production costs of the engine plant, the cost of tool wear occupy first are single-piece production. Traditional view, the hardness and strength of gray iron is linear proportional relationship between the possibility of a certain range to produce the strength and the hardness of the same or a slight rise of gray iron? !
Along this line of thought, cast iron scholars to send special students systematically adequately tested, and large amounts of data to be addressed [1], gray iron hardness and strength of eutectic degree (or carbon saturation obtained, for ease of computation and the establishment of the condensed mathematical formulas, will be cast iron eutectic point of the carbon equivalent of 4.26 antonomasia numerical relationship between the eutectic 1). This outcome is a broad industry acceptance of all countries, its hardness and strength of the relationship between computing principles, have been included within the national standard GB9439-88 \"gray iron castings.
With the results of the study (formula) can be quantitatively and unequivocally reflect the production of cast iron and its pros and cons of the technology.
Any gray iron production plant can be carbon saturation of the production of hot metal will be drawn according to the formula of its calculation of hardness \"and\" computationally intensive \", with the cast test bars, the measured hardness, and the measured intensity of two two compared, respectively, obtained the \"relative hardness\" and \"relative strength\", then \"relative strength\" than the \"relative hardness\", the resulting value is called the \"normal degree\" (or \"quality indicators\"). If the normal degree is equal to 1 indicates that the workshop cast state is normal and reasonable; if greater than 1, compared with excellent, reflecting the workshop given cast iron composition to obtain a higher strength and lower hardness; less than 1 clearly shows the production of poor To improve the material strength is bound to rely on reducing carbon saturation (carbon and silicon content) approach to achieve this is bound to the metal structure and casting defects.
More meaningful, based on the examination statistics of the number of cast iron workshop, some workshop normal up to 1.2, and some shops as low as 0.8. In other words, the same composition of gray iron, the best state of the workshop, the workshop of metal performance compared to state the worst to be higher than 1/2, or which is lower than the former 1/3.
Also through the fact that the material properties of gray iron depends not only on its chemical composition and cooling rate, inevitably there are other deeper reasons play a significant role. They are collectively referred to as metallurgical factors. The research trial showed that the metallurgical factors are generally referred to a series of state content and technology, including raw materials, charging, melting furnace, the lining material, the melting process operation, temperature control, the amount of hot metal gases and trace elements, blast furnace processing, pouring temperature.
Now give two examples to confirm the effects of metallurgical factors: a casting plant in order to reduce costs without pig iron in the medium frequency induction furnace melting, switch to scrap increased carbon (highly graphitized permeability increasing agent) process, cast iron to enhance the performance. Compound inoculant adopted with a small amount of alloying elements, the performance of the resulting cast iron is better than the same amount of alloy added separately to the results of the molten iron.
The other hand, the recent cast iron scholars have spared no effort for the improvement of research try to send a change or control of certain metallurgical factors in order to achieve not primarily dependent on reducing carbon saturation and alloying to obtain cast iron strength (its room for maneuver ). Post dynamic domestic and foreign journals and at all levels learn to perceive clearly.

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How to solve the die-casting and other casting Shrinkage

Posted on May 8, 2012 by admin

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Die casting and casting the existence of shrinkage cavities and the pine is a common phenomenon, there is no method to solve this problem? Answer should be yes, but it will be what is it?
Die castings of shrinkage cavities and loose exist
The die casting shrinkage cavities are bound to exist in only one loose phenomenon that is due to the metal melt filling the liquid into a solid phase contraction phase transition. Die casting solidification characteristics is cooled from the outside, When the casting wall thickness is large, the internal inevitably produce Shrinkage problems.
So, die castings, especially for Heavy die-casting parts, the existence of shrinkage shrinkage problem is inevitable, is not a solution.
2 the only way to solve Die Casting Shrinkage defects
Die Casting Shrinkage can not be completely resolved from the die casting process itself, to solve this problem, only to go beyond the process, or to find a solution from outside the system.
What is this approach?
Process principles to solve the casting shrinkage shrinkage defects only in accordance with the thinking process by feeding the casting solidification process of phase transition contraction, is a natural physical phenomenon, we can not reverse this natural phenomenon law, but only to follow its rules to solve this problem.
Feeding two ways
The feeding of the casting, there are two ways, one natural feeding First, forced feeding.
To achieve a natural feeding, the casting process, it is necessary to achieve the solidification process measures. Many people intuitively think that, using low pressure casting method to be able to solve the shrinkage of the casting shrinkage defects, but the fact is not so. the use of low pressure casting process, does not mean that you can solve the casting Shrinkage defects, if the low pressure casting system is not equipped with the feeding process measures, then this means of low pressure die casting production out of the rough is also possible that one hundred percent Shrinkage defects.
Due to the characteristics of the die casting process itself, to set up the natural \"order of solidification process measures are more difficult, complex and most fundamental reason may be,\" solidification process measures, the general requirements of casting a relatively long solidification time, which, with the die casting process itself is somewhat contradictory.
Forced coagulation of the feeding of the most important feature of coagulation time is short, generally and \"solidification\" quarter or less, so on the basis of the die casting process, the addition of forced feeding process measures, with the pressure casting process, the characteristics of a good solution to the die casting Shrinkage problem.
Compulsory reduction of two levels: extrusion feeding and forging complement reduction
Forced feeding of casting can be achieved with two levels is a basic casting shrinkage can be eliminated to the extent of shrinkage defects, one can make rough internal to achieve the degree of crushing grain or forging state organizations. If you want different words to express the varying degrees of these two words, then the former we can use the \"squeeze feeding\" to express the latter, we can use \"forging feeding\" to express.
Give full attention to a way of understanding a concept is to distinguish the feeding is a direct means, it can not be done indirectly. Process, we can have a process parameter to express, which is feeding the pressure \".
Physical principles, the concept of pressure both cases, there may be a liquid occasions, \"Archimedes\" occasions, in order to distinguish, we define it as \"liquid pressure\", while another appears In the solid state occasions, we define it as \"solid-state pressure should be noted that the pressure application of the concept of two different state conditions. if we are confused, there will be a big problem.
\"Liquid pressure\", it applies only to the liquid system, the direction of the pressure is passed, you can turn, but the model does not apply in the solid phase system.
The die casting feeding, between semi-solid and solid state, the value of the pressure, the direction is a vector pressure in the same direction, its direction and imposed feeding force.
So, that kind of thought that by increasing the die casting machine pressure shot cylinder pressure by increasing the injection filling pressure Die Casting Shrinkage, and that the injection pressure can be passed to the whole process of casting solidification stage, achieve casting feeding of ideas, is completely wrong.
By the first die-casting mold filling, after forging feeding \"of the process is an effective way to solve the casting Shrinkage defects, but also a last resort.
First die-casting mold filling, after forging the feeding process, we can die forging process referred to as its essence, is a casting and forging process, the die-casting process with liquid forging process combining the most effective combination of features of these two devices together to complete the process.
Continuous casting and forging, die forging equipment, the appearance of ordinary vertical or horizontal die casting machine is very similar, in fact, die-casting machine, hydraulic forging the head can be coupled with the largest forging feeding a force equal to the maximum clamping force of the die casting machine.
It should be noted that the nominal parameters of this die forging machine is the most important, is not a clamping force, but forging the feeding force, which is equivalent to a four-column hydraulic press forging force meaning, which is in the device selection must be fully attention or bought a clamping force, but forging make up a the contractility small die forging equipment, its use value is significantly impaired.
The use of die forging machine production of rough, high dimensional accuracy, surface finish is also very high, the equivalent of more than six machining methods can achieve the accuracy and surface roughness level, it has been attributed to the limit shape —- The process means than cutting a small margin forming \"process a big step

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Liaoning Industrial Park theme, casting Nanfen Promotion held in Chongqing

Posted on November 21, 2011 by admin

10:00 am, Nanfen area trade group in Chongqing Marriott Hotel organized a “theme park in Liaoning concept Nanfen casting industry investment promotion,” Vice Mayor Fu Changsheng Benxi city, city and other cities by the co-director Wu Hongwei leadership, the district government head Nanfen blessing song with the Standing Committee Zeng Kai, deputy director Li Naixiu, deputy director of the Pan students learn, Deputy Mayor Li Ao loose, the District Court, Zhang Xiaowei, Nanfen casting Industrial Park, Liaoning Vice Renchen Qing, etc. , and park-related personnel and Chongqing and the surrounding more than 20 famous enterprises were present at the meeting.

chinese precision casting

Meeting was chaired by Deputy Mayor Li Ao loose chaired by the head of the district government Nanfen blessing song with welcoming remarks, the park management committee deputy Renchen Qing promote the park s investment environment and projects. It was also broadcast the “Industrial Park, Liaoning Nanfen casting commercials,” and held a project signing ceremony. The promotion of intent signed an agreement two, contract amount $ 400 million, including investment of 300 million produce 50,000 tons of compacted graphite cast letter of intent, invested 100 million yuan annual output of 20,000 tons precision castings letter of intent.

investment casting companies

Vice Mayor Fu Changsheng was introduced to the participating merchants Benxi s location, transportation, resources, industries, policies, contacts and other six advantages, play six cities card: mountains, were water, name of food, wine, Norm, city. Many customers have expressed for the recent visit to the Nanfen to seek further opportunities for cooperation. Chongqing Machinery & Electronics Co., Ltd. devices Xiao Jian Tong said sincerely: “Benxi has a good industrial base, the investment environment, policies are also very good, hope that through cooperation, allows businesses to develop more new level.”

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South Korea s steel export market and the Strategy of operating status

Posted on November 10, 2011 by admin

In recent years, Northeast Asia, with China and other stainless steel production lines running, overcapacity situation intensified. Korean companies in the country under hardship

saturated, have sought to defuse the crisis through exports, to survive. Meanwhile, South Korea, the domestic market is also no shortage of hot spots, 400 series stainless steel was

home on the market share, selling 300 series and 400 series of the two patterns is also gradually been formed: the middle of imported materials continue to erode the circulation,

while the domestic wood the effort in large end-user companies. The future of Korean steel company said business is to survive, how to interpret the king of the road? Promote

business prosperity, profit, and maintain the lifeline of the road, Where? Face foot step ahead of the opponent, how to stand out in the numerous and unorganized, I self-Lingual?

Warring States Korea stainless steel market has been quietly turned off the dispute. This initiate the reader to show that South Korea s stainless steel market, those companies do.

First, the South Korean steel exports to the status quo and Strategic Analysis

precision investment casting

1, South Korea exported hot-rolled stainless steel sheet situation of broadband

By observing the data for 2004-2006 shows that this stage in Northeast Asia, especially China s exports accounted for an overwhelming share. But with China s domestic

stainless steel production line in operation and expansion of production capacity, a significant reduction in imports. Lows reached in 2007, after it is all the way down. POSCO to

face the new situation, a positive response. The perspective shifted to Southeast Asia, Thailand, through the holding company Thainox stainless steel company, the acquisition of

Vietnam and other Asian steel companies a series of measures, quickly established its presence in Southeast Asia, the absolute power in the field of stainless steel, and dominant.

POSCO eyes focus on Southeast Asia in the global stainless steel market, the key moment, a step at the head, at every step, to establish its presence in the Southeast Asian

stainless steel market advantage and position. Stainless steel base with the acquisition of the establishment, also contributed to Korea s export hot-rolled stainless steel raw

materials.

Europe, after 2007, giving rise to the growth trend; Central and South America although the export volume in the small, but after 2004 showed substantial growth; the Middle

East in 2008 the strong performance of exports, but in 2009 Dubai crisis, exports are affected, began to decrease.

2, South Korea, the export trend of cold rolled stainless steel sheet broadband

The export market regions as follows: the more eye-catching performance in Europe, and since 2008 has been a steady growth, but recent rumors, Eurofer, or the start of the

Asian stainless steel anti-dumping investigation. In this context, Korea s exports of cold-rolled stainless steel, or will be affected, the export strategy must change will occur;

Southeast Asia needs stability after 2004 and increased steadily, but with the POSCO steel market in Southeast Asia, the improvement of the layout, Southeast Asia s exports has

been weakened to some extent. The latter part of the potential and space has been limited; the Middle East and Central and South America is currently actively explore the field,

and produce some results with the effects of exports since 2008, steady growth, the latter part of the space is still huge.

3, South Korea, domestic stainless steel industry export strategy

2008-2009, POSCO Stainless Steel proportion of domestic and export sales were 60% and 40%. Since 2010, the proportion of exports gradually increased to 50%. BNG

Steel, Hyundai Steel s exports of stainless steel sector and other enterprises, but the proportion decreased from 30% to 20%. Currently broadband material, narrow timber and

sheet business dilemma of supply exceeding demand in the domestic market, have to seek overseas markets. But a few happy tears, the overseas market is also not satisfactory, in

addition to the automotive, appliance, other downstream industries recover more slowly, which increases the difficulty for export. In addition, if only the blind pursuit of the

expansion of the export share, the compression domestic market share, is unreasonable, the company is obviously useless. Maintain the proper proportion of exports and seek

growth in export profits, while product quality, service, price competitiveness should be concerned about, according to the different characteristics of different markets, the

development of rational, targeted strategic measures should be considered is the focus of business . The so-called know ourselves, make the best fit through flexible policies to be

able to guarantee the profits of enterprises, the development of enterprises gain more room.

casting factory

POSCO s share of domestic sales and exports will remain the short term, exports account for a large proportion of not going to break the pattern. Hot-rolled stainless steel, the

domestic large steel service center, or a short process rolling power plant is clearly not the heart, in the context of fierce competition, the ability to hot-rolled stainless steel

digestion POSCO is very limited. In this case, actively explore overseas markets, to seek foreign partners, the model is compelling. In particular with Europe, Taiwan, Southeast

Asia and other regions within the short process of hot-rolled stainless steel rolling plant supply MOU signed between the co-operation agreement, POSCO virtually stable export

hot-rolled stainless steel. If the guarantee amount at the same time, concerned about the price competitiveness of local conditions, services, and other factors, will gain good

results. It is reported that, POSCO in Italy and Taiwan, with manufacturers to discuss hot supply MOU, and some have reached an agreement, and some are still under negotiation.

With the endless rolling technologies, cold-rolled stainless steel production expanded accordingly. Post-cold-rolled stainless steel selling pressure is still great, exports will

ease domestic well oversupply situation. South Korea is concerned about the export of three-step strategy, first of all to focus on a breakthrough in steel, for entering foreign

markets; Second, select the country or the region s key spending areas, the conditions allow, the establishment of the factory; final open up the country s end-market demand, and

actively promote product sales.

Second, South Korea, 400 series stainless steel domestic development and sales of Model of the status quo

1, South Korea, the proportion of domestic steel production of 400 series overview

At present South Korean domestic automobile and appliance field for the 400 series stainless steel end demand strong performance, combined with endless rolling equipment

delivery and promotion of Korean domestic market, the 400 series stainless steel market liquidity, there have been some growth.

South Korea s domestic steel case: POSCO400 system maintained at 40% production share. Demand growth in the context of the terminal, the middle of its domestic market

share is still stagnant circulation, mainly due to weak price competitiveness. 400 recent price of timber is imported Korean domestic market than the flow of low prices of about

30-40 million won. POSCO To the intermediate circulation in the market competition, must rely on the latter part of the price competitiveness and the endless rolling improvement

of product quality, so as to expand the market share of domestic intermediate flows.

In 2009, BNG Steel 400 series sold approximately 55% share. 2010, no more substantial changes, remained stable at this level. BNG Steel s downstream customers also

concentrated in the automotive and home appliances. BNG Steel 400 series variation in prices of raw materials more stable supply of raw materials to ensure the 400 system and

the stability of production, so the 400 series stainless steel output of over 300 large department. It is reported, BNG Steel 400 lines, 430 larger proportion of steel production and

marketing.

Hyundai Steel, the 400 series is not only much lower than the 300 production line, while more than 200 lines. According to the 2010 Hyundai Steel stainless steel production in

statistical data analysis, the proportion of all varieties of stainless steel are as follows: 200 series 18%, 12% of Department 400, 300 70%. The reason, Hyundai Steel in the field

of automotive and appliance end-use stainless steel less, so the direct supply is relatively less, which led to the production of 400 series stainless steel has been maintained at a

lower level. It is reported that in 2011, Hyundai Steel production of 400 series stainless steel will not share has increased at about the 10% level.

Cold-rolled stainless steel sales model 24 series

Cold-rolled stainless steel 400 series 2009 market share of 38.2%, once the fourth quarter, when 40% or more. In May 2010, 400 series stainless steel rose to 47.3% of the

high points, breaking the previous record.

Three quarters of 2010 sales of cold rolled stainless steel 400 series has surpassed the total sales in 2009. Annual production and sales of stainless steel 400 series will have

unexpected growth. The formation of such a fundamental change in South Korea because of the domestic automobile, home appliances and other end needs a strong pull. Of

course, exports have shown a good momentum in the third quarter of 2010, exports of cold rolled stainless steel 400 series total 178,372 tons.

Circulation in the middle market, imported products account for most of 400 series stainless steel market country.

January to September 2010, 400 series stainless steel cold-rolled imports totaled 84,438 tons, the average monthly imports of 9,382 tons. And in 2009 the average monthly

volume of 9,117 compared to the imports, there has been slight growth. According to this trend, then the next 400 series stainless steel cold-rolled imports worth the wait.

Cold-rolled stainless steel from South Korea on the sale of the domestic point of view, 300 circulation mainly in the middle of the main way of selling, and 400 series factory

direct supply to end customers is the main mode. Downstream automotive exhaust pipes, automotive castings and other special uses such strong demand, increasing the amount of

direct supply manufacturers. Although part of the terminal for appliances in savings of cost considerations, and may have chosen to import material, but overall, driven by strong

demand for terminal manufacturers of domestic enthusiasm. In contrast, imports of cold rolled stainless steel 400 series material circulation mainly through the middle into the

market, because of price advantages, mainly for construction and kitchen and other areas. In this way, Korea 400 series stainless steel cold-rolled to form a dual market model of

development. Domestic manufacturers to large domestic terminal as the center, with the establishment of close contacts and cooperation; imports of general-purpose material

places the center, through the price advantage, the middle flow of the domestic market eroded widow 400 K Department of growing imports, POSCO and BNG Steel, etc. have

also been given greater attention, the latter part of the formation of appropriate policies might have been timely response, but after all, takes time. The current model is more

difficult to form a qualitative change.
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investment casting company

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Technology: the evolution and development of pneumatic valve works

Posted on November 10, 2011 by admin

Evolution: pneumatic valve was evolved from the stopcock. It s 90 degrees with the same movement, the body is different is the cock ball, a round hole or channel through its axis.

Spherical and the proportion of openings should be such that when the ball rotated 90 degrees, in imports and exports should all show spherical Department to cut off flow. This

type valve in the pipe can be installed anywhere.

gear box castings

Works

Just use the pneumatic valve pneumatic air source 90 degrees Used for the operation and a small rotation torque can be closed tightly. Complete equality of the body cavity for

the media to provide a little resistance, through the flow channel. Generally considered the most suitable valve opening and closing directly to do with, but the recent development

has been designed to give it a throttle valve and flow control purposes. The main features of the valve itself is compact, easy operation and maintenance for water, solvents, acids,

and natural gas work in general media, but also for poor working conditions of media, such as oxygen, hydrogen peroxide, such as methane and ethylene . Valve body can be a

whole, it can be modular.

The reality of the role of pneumatic valve

Pneumatic valve works by rotating the valve spool to make the flow or occlusion. Pneumatic valve switch light, small size, can be made large caliber, reliable sealing, simple

structure, easy maintenance, with the spherical sealing surface often in the closed state, is not susceptible to medium erosion pneumatic valve in the industry that is widely

applications. Pneumatic valves and plug valves belong to the same type of valve is only pieces of it off is a sphere, a sphere around the center line of a rotary valve to achieve

open and close a valve.

Advantage

Pneumatic valve in the pipe is mainly used to do cutting speed, the flow of media distribution and change direction. Pneumatic valve is widely used in recent years a new type

of valve, it has the following advantages: 1. Fluid resistance, the resistance coefficient and the length of the pipe with the same. 2. Simple structure, small size and light weight. 3.

Strong, reliable, current valve sealing surface material widely used plastic, sealing in the vacuum system has also been widely used. 4. Easy to operate, opening and closing

rapidly, from fully open to fully closed as long as the rotation 90 °, to facilitate the remote control. 5. Easy maintenance, simple pneumatic valve, seals are generally active, are

relatively easy to replace demolished. 6. In the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, the medium through, will not cause erosion

of the valve sealing surface. 7. Wide range of applications, from small to a few millimeters in diameter, large meters, from high vacuum to high pressure can be applied. 8

because the pneumatic valve power source used is a gas, usually 0.2-0.8MPa pressure, relatively safe. If the pneumatic valve leak, then the relative hydraulic, electric, the gas can

be directly discharged to the environment without pollution, and high security. 9 and turbine rotation relative to the manual valve, the pneumatic valve of large diameter can be

configured (manually and turbine rotating valve DN300 diameter generally in the following, pneumatic ball valves up to DN1200 diameter now.) Pneumatic valve has been

widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rockets and other departments, as well as people s daily lives.

Pneumatic valve structure can be divided by:

alloy steel casting

A floating ball valve pneumatic valve pneumatic ball is floating in the medium under pressure, the ball can produce some displacement and pressed in the export side of the

sealing surface to ensure the outlet seal. Floating pneumatic ball valve of simple structure, good seal, but the media sphere to bear the load of work to pass all export ring, so to

consider the ring material can withstand the sphere of media work load. This structure is widely used in low-pressure valve.

Second, the fixed ball pneumatic valve

Pneumatic ball valve is fixed, pressure produces no movement.

Floating ball valve comes with a fixed seat, by the media pressure, the valve seat have moved to seal pressed on the sphere, in order to ensure sealing. Usually with the ball in the

upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the operating torque and pneumatic valve to

increase the reliability of the seal, valve seal has emerged in recent years, both in the sealing surface injection pressure special lubricating oil, to form a layer of film that

enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Third, the elasticity of the ball valve pneumatic valve pneumatic sphere is flexible. Ball and seat rings are metal materials, sealing pressure than the large, rely on the media

itself can not seal the pressure has reached the requirements to be imposed by external forces. This valve suitable for high temperature and pressure medium. Elastic sphere is the

sphere wall at the bottom of a flexible open slot, and access flexibility. When the closed channel, wedge-shaped head with a stem and the valve seat to open up the ball pressed to

seal. Release the ball before turning the wedge-shaped head, along with sphere to restore the original prototype, the ball with a small gap between the valve seat, sealing surface

can reduce the friction and operating torque. Pneumatic valve according to their location can be divided into straight-channel, three-and right-angle type. The latter two ball

valves for the distribution media and change the flow of media.

Pneumatic ball valve manual

1, range

This manual applies to flanged end of the electric (or pneumatic) valve.

2, composed of

By the electric (or pneumatic) actuator (20) and valve body parts connected by its bracket (18) and the connecting shaft (17).

3, the use of restriction

Temperature and pressure valve limit l plate showing the maximum and minimum operating temperature of the maximum allowable operating pressure. l Use PTFE or RTFE

seat and seal materials, operating temperature should be 150 degrees to 200 degrees. Other types of seat and seal the operating temperature, should be KI factory checks. L low

nominal pressure level valve (PN), may indicate that the valve in the normal temperature conditions the maximum working pressure. (For example: PN4.0, that its operating

temperature-290C ~ 380C when the maximum working pressure of 40Bar (4.0MPa)). l electric or pneumatic actuators See Notes on the corresponding instructions.

4, the installation

1), removing the protective cover on both sides of the flange side, the valve is fully open state to wash clean. 2), the signal should be required prior to installation (electric or

gas) for the whole test (to prevent vibration affecting transport performance), after passing the on-line installation (wiring by electric actuator circuit diagram). 3), prepared with

the pipe connection, it shall be washed and cleaned of residual impurities in the pipeline (these substances may damage the valve seat and ball). 4), during installation, please do

not use the valve actuator as the lifting of the lifting some point, to avoid damage to the actuators and accessories. .5), This type valve should be installed in horizontal or vertical

pipe direction. 6), installation of the pipeline near the falls or not there is the phenomenon of external force can be used to pipe supports or supports to eliminate the deviation

from the pipeline. 7), and pipe connections, please use the provisions of cross-locking torque flange bolts. 4, operation and use 1), the operator be sure that the piping and valves

have been washed off. 2), the operation of the valve actuator according to the size of the input signal to drive the valve stem rotation to complete: forward rotation 1 / 4 turn (90

°), the valve off. Counter-rotating 1 / 4 turn (90 °) when the valve is open. 3), indicating the direction of the arrow when the actuator in parallel with the pipeline, the valve is

open; indication arrows and vertical lines, the valve is closed.

5, maintenance

Have a longer service life and maintenance-free period, will depend on several factors: the normal working conditions, to maintain harmony temperature / pressure ratio, and

reasonable corrosion data Note: ● valve in the closed state, the body still inside ● there is fluid under pressure before servicing, and to relieve line pressure valve in the open

position ● maintenance, disconnect the power or gas supply ● servicing, with the bracket from the actuator 1), was re-tighten the packing at l If the packing culvert at a micro-

discharge occurs, shall be re-locking stem nut (13). l careful not to lock tight, usually re-lock 1 / 4 turn to 1 ring, leakage will stop.

2), replace the valve seat and seals. A), remove the valve is half open l position, flush, clear body of dangerous substances that may exist inside and outside. L close the valve,

removed both sides of the flange bolts and nuts , then the valve is completely removed from the pipeline. l order of demolition drive – actuator (20), connecting bracket (18), lock

washers (14), stem nut (13), butterfly tabs (12), Glam (11), wear-resistant films (10), stem packing (9) l remove the body cover bolts (5) and nut, the valve cover and valve body

separation, and remove the valve cover gasket (16). l confirm the ball (3) in the “off” position, which can be more easily from the body out, then remove the seat. l from the valve

stem in the hole, push down slightly (6) until it is completely removed, then remove the O-ring (8) and lower stem packing (7) Note: Please exercise caution to avoid scratches the

surface and the valve stem body parts of stuffing box seal B), re-assembled l remove parts for cleaning and inspection is strongly recommended spare parts package to replace its

valve seat and valve cover gaskets and other seals l by reverse order of disassembly for assembly. l with the specified torque, cross-locking flange bolts (5). l with the specified

torque, tighten the stem nut (13) l install the actuator, the input signal corresponding drive spool rotated by rotating the stem, the valve to open and closed position. l If possible,

install pipes in the back before, according to relevant standards for pressure sealing of the valve testing and performance testing. D, model representation: as the valve Q11S-16C

prior to this were “S” that is the older method, “S” pay on behalf of the plastic seal is now with the “F” said Representative PTFE or PTFE material

sand casting

Classification and characteristics of pneumatic valve

Pneumatic valve with O-pneumatic valve and pneumatic valve V-divided. O-pneumatic ball valve with floating structure, core ball for precision casting, chrome plated

exterior, with enhanced PTFE seats, stream crossing and the same pipe diameter, flow capacity significantly, flow resistance is extremely small, closed When no leak-off valve is

generally used to do, particularly for high viscosity, V-ball valve with fixed structure, the ball core has opened a V-notch, cutting can be achieved with fiber, granular media can

be different according to the process equipment use pneumatic or electric actuators, pneumatic valves and electrical components, respectively, ball valve, pneumatic valve, such

as one to achieve the proportional control valve positioner shall be equipped with electric proportional control valve as required to achieve the election or electronic actuator

with servo amplifier. From the material, can be divided into: carbon steel ball valve, stainless steel 304 ball valve, ball valve and brass valve 316 according to the pressure, can

be divided into: high-pressure ball valve and low pressure pneumatic valve: mainly used in oil, natural gas , hydraulic oil, construction machinery and other low pressure

pneumatic valve industry: mainly used in corrosive media such as water pipes on the road!

open die forging

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Yancheng is committed to creating the world center of the valve industry.

Posted on November 10, 2011 by admin

The rapid development in recent years, the size of Yancheng valve sales of $ 3 billion in 2006, strong growth to $ 5.5 billion in 2007, is expected in 2009 exceeded 60 billion

yuan in 2010 exceeded ten billion yuan for major off. The industry believes that, following the Zhejiang Yongjia, Longwan after becoming China s Jiangsu Yancheng another large

valve manufacturing base.

casting factory

Yancheng valve early start in industrial development, reform and opening up, the local government and increase support for efforts to encourage private enterprises to focus on

the development of the valve industry, thereby speeding up the Yancheng valve industry. The region now has about 400 large and small companies around the valve, of which

more than 110 enterprises above designated size valve, basically forming a cluster with specialized production pattern. In addition, production and export Yancheng valve

manufacturers are also increasing, two or three national development from the beginning to now have large-scale export-oriented enterprises with more than 50, more recent

years, foreign sales to 40% to 50% annual rate of growth, products sold in Europe, America, Southeast Asia, the Middle East and other countries and regions, exports from the

previous small-caliber valve, gate valve gradually transition to the low-end products such as large diameter valves, ball valves and other higher value-added products.

With North America, Western Europe and other developed countries to increase procurement in Yancheng joint venture production of valves and valve strength, Wenzhou,

Yancheng valve enterprises to accelerate the transfer, there are 15 well-known recent valve business Development Zone, Yancheng business presence, so that further growth of

the local valve industry.

china investment casting

Recently, the government made money Yancheng Yancheng fight for the “World Valves Industry Center” vision, Yancheng Economic and Trade Commission also proposed the

“starting point Yancheng valve industry development plan preparation, strengthen construction of the park, to undertake industrial transfer valve the establishment of intermediary

organizations valve industry, construction, valve industry logistics platform to promote the construction of the valve business e-commerce, to create Talents, the valve industry to

accelerate technological innovation, speed up to cultivate leading enterprises, promote the rational allocation of resources, regular valve China Yancheng fairs, to strengthen the

valve to open up international markets, to convene the World Conference of the valve center named “10 measures, and decided to create castings, forgings, pig iron, coke, steel,

seals, standard parts, pneumatic parts, hydraulic valve parts, etc. industry-related products distribution center supporting Jackie Chan for the valve to form a complete industrial

chain basis, eventually leading Yancheng into the international level on behalf of the international valve industry production base, procurement base and R & D base, started

“Yancheng valve” the brand.

investment castings

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Machine parts to build industrial base transformation Demonstration Zone, Ningbo

Posted on November 10, 2011 by admin

From Ningbo Economic Development Bureau, Ningbo go all the machine parts industry base in Ningbo City, playing advanced industrial transformation and upgrading

demonstration area. It is understood that this machine parts industry in miniature bearings, seals, featuring the precision low-noise bearings, automotive bearings, special bearings

and other high-grade small bearings, special seals for the direction to Yokogawa, Zhouxiang, white sand core block, the level of equipment to enhance and accelerate the

integration of industry resources to create a certain influence in the world of miniature bearings and seals industry base. Strive for more than 20 million in 2011 value exceeded

6.5 billion yuan scale enterprises (including the city six billion yuan), up 12%. Industrial R & D funding to 1.6% of sales, new product output value growth rate of more than 15%,

10% of industrial investment growth, profit growth of 10% or more tax, regulation on corporate yield industrial added value increased more than 8%, backbone enterprises of

local matching rate by 2 percentage points.

open die forging

Casting equipment manufacturing industry is the basic industry. An advanced, powerful equipment manufacturing industry is bound to have an advanced, strong foundation and

support for the foundry industry. According to the International Mould & Plastic Hardware Industry Suppliers Association official Luo Baihui introduced Ningbo foundry industry

has been walking in the forefront of the foundry industry, regardless of the size of the industry, or the level of casting technology has greatly improved. There are all kinds of

casting the city s thousands of enterprises, employment of about 70,000. The city s casting production reached 100 million tons, production value of about 100 billion yuan for

Ningbo s economic construction and promote the development of equipment manufacturing industry has made great achievements.

Yangtze River Delta Economic Zone of Ningbo as the most active industrial cities, has already become China general machinery, shipbuilding, plastics machinery, printing

machinery, packaging machinery, motor vehicles and parts, electrical equipment, household appliances and accessories, electrical and mechanical parts, power tools, stainless

steel products, fasteners, bearings, plastic products, stationery, lighting, electrical and other important production base.

In recent years, with the casting of Ningbo enterprises to increase export volume and export high-quality casting requirements, forcing Ningbo foundry business through

continuous technological innovation, to improve their competitiveness. March 5, 2011 至 7 Day Year Ningbo International Foundry, Forging, Die Casting Industry Exhibition will

be held at Ningbo International Convention and Exhibition Center. The exhibition organized by the Ningbo Economic Committee and Ningbo foundry industry associations,

Ningbo Huacheng Exhibition, Ningbo Zhong Cheng exhibition companies. The exhibition will display the device type casting, forging equipment, classes, class die-casting

machines and auxiliary equipment, raw materials, class, category industrial furnaces heat treatment and various uses of castings and forgings, energy saving equipment and

technology. Ningbo International Foundry, Forging, Die Casting Industry Exhibition to be held, as well as the promotion of Ningbo, Zhejiang Province, foundry industry, the

province and the Yangtze River Delta region to meet the growing manufacturing sector demand for metallurgical products and equipment, will play a pivotal role in .

Ningbo foundry industry has been walking in the forefront of the foundry industry, regardless of the size of the industry, or the level of casting technology has greatly improved.

There are all kinds of casting the city s thousands of enterprises, employment of about 70,000. The city s casting production reached 100 million tons, production value of about

100 billion yuan for Ningbo s economic construction and promote the development of equipment manufacturing industry has made great achievements.

Since 2000, Ningbo casting industry entered a period of rapid growth, almost 40% per year rate of increase. Although the decline in 2005, casting has achieved 22.64% of total

growth in output to achieve a 28.48% growth. 2010 from the latest available information to see the company s sales, Ningbo foundry industry is showing a strong rebound is very

encouraging.

heavy forgings

Analysis of Ningbo foundry industry

In recent years, Ningbo City, the foundry industry developed rapidly. Yangtze River Delta region has become an important production and export base casting. Casting product

development together.

Classification from the material perspective, including cast iron, steel and non-metallic alloys. The main products are ductile cast iron, gray cast iron. Steel precision castings

mainly for class, including carbon steel, stainless steel, alloy steel. Non-alloy castings including steel alloys, aluminum alloys, magnesium alloys, zinc alloys and titanium.

The application of the product categories from the casting, casting products involves six major categories. Class diesel engines, including power accessories, automobile,

motorcycle cylinder parts. Class of high pressure valves, fire equipment. Machine type injection molding machine parts, CNC parts, general machinery machinery parts. General

device class engineering machinery, mining machinery parts. Class of thermal power boiler accessories. A variety of civil class family lamps, automotive lamps, road covers,

etc. are produced.

From a regional distribution, mainly in the Foundry Ningbo Yinzhou, Yuyao, Cixi, Beilun, Fenghua, Xiangshan and other places. Yinzhou District, which is the city s most

concentrated areas of foundry business. Luo Hui commented that, in the foundry industries, Ningbo has formed a certain scale of production and industrial base, industry

concentration is strong, clear regional characteristics.

First, Yinzhou District, the main production of cast iron and steel castings. Yinzhou District, the production of ductile iron and cast iron Soochow dominated, especially sun and

the moon casting Group, has become the largest manufacturer of cast iron, cast iron, and the proportion of exports in recent years, growing; Yunlong Yinzhou District, Hengxi area

dominated by the production of precisioniron castings, and high-intensive enterprises, and foreign products, known as the Kingdom and the casting casting town.

Second, Beilun, Ninghai primary production of aluminum alloy, magnesium alloy die-casting products.

Third, Cixi also produce iron castings, the products mainly for large castings and valves based power.

alloy steel castings

Fourth, the main cast iron products Xiangshan cylinder engine, pumping cap. And strong industry cluster, but also to die as the basis, driven foundry industry.

Fifth, the dominant private enterprises, foreign-funded enterprises began to seize Ningbo foundry industry. Ningbo foundry business is mainly responsible for private-owned

enterprises, private stock companies, foreign-invested enterprises, very few state-owned joint-stock enterprises. As the flexible mechanism of private enterprise, Ningbo foundry

business development rapidly.

Posted in Uncategorized | Tagged cast iron foundry, dozer cutting edges, excavator wear parts | Leave a comment

Yancheng will strive to create the world center of the valve industry..

Posted on November 10, 2011 by admin

The rapid development in recent years, the size of Yancheng valve sales of $ 3 billion in 2006, strong growth to $ 5.5 billion in 2007, is expected in 2009 exceeded 60 billion

yuan in 2010 exceeded ten billion yuan for major off. The industry believes that, following the Zhejiang Yongjia, Longwan after becoming China s Jiangsu Yancheng another large

valve manufacturing base.

investment casting china