Flared type tube fittings Application:

flared tube fittings applies to pipe oil, gas, water and other connections. For medium: oil, water, gas and other non-corrosive or corrosive media fittings, equipped with flexible stainless steel pipe fitting specifications, pipe welding after having a solid connection, good sealing performance characteristics, which in refining, chemical, light industry, textile, defense, metallurgy, aviation, shipbuilding and other systems that are widely used; also applies to all kinds of mechanical engineering, machine equipment, such as hydraulic transmission lines.

Tube fittings have a solid connection

Tube fittings have a solid connection, high voltage capability, temperature, sealing, and repetition is good, easy installation and maintenance, safety and reliability.
Works Tube Fittings is the steel insert card kit, use card sets nut, inconsistent card sets, cut the pipe and seal. When it is connected with the pipe without welding, it is conducive to fire, explosion, and high-altitude operations, and to eliminate the evils of careless welding. So it is oil refining, chemical, oil, gas, food, pharmaceutical, instrumentation, and other pipeline systems controlled device in a more advanced connection. It applies to pipe oil, gas, water and other connections.
Card sets of pipe fittings is composed of three parts: the connector body, sleeve, nut. When the card is inserted into the sleeve and the sleeve nut on the pipe joint body, when tightening the nut, the front end of the outer sleeve and the connector body tapered fit, uniformly bite into the inner edge of seamless steel tubes, to form an effective seal.

Flare tube fittings for medium

Flare tube fittings for medium: oil, water, gas and other non-corrosive or corrosive media Tube fittings, equipped with steel pipe specifications more flexible, and After the pipe welding with a solid connection, good sealing performance characteristics, which are widely used in oil refining, chemical industry, light industry, textile, defense, metallurgy, aviation, shipbuilding and other systems; also suitable for all kinds of mechanical engineering, machine tools, etc. hydraulic transmission lines. Flared type tube fittings Manufacturing Standards
1, the flared end of the straight pipe fittings (GB / T 5625-2008)
2, flared taper thread straight couplings (GB / T 5626-2008)
3, flared long tapered threaded pipe fittings (GB / T 5627-2008)
4, Flared type tube fittings (GB / T 5628-2008)
5, flared taper thread elbow fittings (GB / T 5629-2008)
6, flared elbow fittings (GB / T 5630-2008)

high pressure tube fittings is a relatively high voltage capability fittings.

high pressure tube fittings as the name suggests is a relatively high voltage capability fittings. China's chemical standards to withstand the pressure of the pipeline ≥16MPa called high-pressure pipeline. High-pressure pipe used in certain circumstances such as pressure vessel pressure steam equipment, chemical high temperature and pressure pipelines, power plants and nuclear power plants, high-pressure boiler accessories.
Category division: 1, 2 high-pressure elbow, tee 3 high pressure, high pressure flange 4, high-pressure reducer 5, the high-pressure pipe caps, 6, 7 hyperbaric blind, high-pressure high-voltage Male connectors head 8 division: welded connections, threaded connection, bolted
Material division: 20G, 20MnG, 25MnG. 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG 12CrMoVG, 12Cr3MoVSiTiB 1Cr18Ni9,0Cr18ni9,1Cr18Ni11Nb like.

FD-LOK 37° flared tube fittings characteristics

FD-LOK 37° flared tube fittings characteristics:
1, the flared tube fitting design and manufacture in accordance with the standard SAE J514;
2, hardened and polished thread extend the life of the joint, avoiding yin and yang thread engagement;
3, elbow channel arc connections to ensure smooth flow of fluid;
4, stainless steel nut threads silver, to reduce friction with the body threads;
5, are engraved with sizes, materials and heat number on each joint;
6, removal and re-tighten fittings convenience, all of the male threads are wearing plastic protective cap.

Material selection of FD-LOK high pressure pipe fittings

High pressure pipe fittings materials are 20G, 20MnG, 25MnG. 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG 12CrMoVG, 12Cr3MoVSiTiB 1Cr18Ni9,0Cr18ni9,1Cr18Ni11Nb like.
We want to be depending on the material characteristics of the previous election in the choice of the time. Pipe material is a basic attribute pipe fittings, pipe fittings also the foundation. Our professional sales staff, or technical personnel, material parameters will pipe fittings do a detailed information for your understanding.
Seamless high-pressure pipe forging materials are F92, F91, F22, P91, P92.WB36. Each tubular member corresponds to different materials.

FD-LOK 37° flared tube fittings

FD-LOK 37° flared tube fittings to connect both imperial and metric series of rigid pipe connecting the nut is American UNF thread, which is different from domestic flare fittings metric thread connection. It works through a dedicated flaring equipment will end rigid tube expansion into the 37° flare tube fittings; outer cone with the seal, so as to achieve the purpose of rigid pipe connections. Currently used widely in the North American market.
37° flare fittings, Triple-Lok connector and can be used as transition joints JIC hose fittings.
37flare fittings Overview
37° flare fittings in the 1930s in the US industry is used. This joint American Society of Automotive Engineers SAE type test included an industry standard.
37° flared fittings and fittings become the most widely used industrial hydraulic two fittings.
37° flare fittings applies to both British Standard Pipe, also applies to metric pipe fittings (3 mm-50 mm).
Flaring method can not process a large steel pipe wall thickness, so the 37° flare tube fittings withstand a limited extent.

Processing Considerations FD-LOK high pressure pipe fitting

Processing Considerations FD-LOK high pressure pipe fitting
High pressure pipe fittings replaced by normalizing annealing process is more economical. Let's say for processing Notes on stainless steel elbow, stainless steel elbow made of stainless steel, it is the most representative of the characteristics that is does not rust. No rust is closely related to the operation time, the time change will occur in different colors. Change the order of the color is brown, gold, red, purple and green. The process is especially a big galvanized elbow connection.
Tees, reducers, high-pressure pipe is generally used in our company's branch office in the steam pipe trunk, to provide users with the necessary means to a heat source, in dealing with more nodes, our products have unique technical processing experience, can users with the best advice. To ensure that the characteristics of high quality, high efficiency, low labor intensity.

Anticorrosive method of needle valve

First the body of the anti-corrosion, the main choice of materials for stainless steel, carbon steel. Corrosion is very rich, but can choose properly, or not easy, because the corrosion problem is very complex. Select Instrument needle valve material difficulty, lies not only consider the corrosion problem, and must consider the ability to withstand temperature, whether it is economically reasonable, is it easy to buy and other factors.
Second is to take the lining measures, such as lining of lead, aluminum lining, plastic lining, lining of natural rubber and synthetic rubber. If the medium conditions permit, this is an economical method.
Again, the pressure, temperature is not high case, the main Needle valve to do with non-metallic materials, can often be very effective to control corrosion.
In addition, the outer surface of needle valve body is also subject to corrosion, general steel materials to paint protection.

Needle valve

Is a fine needle Instrument valve , the valve plug into a needle shape, mainly for regulating the flow of solar term. Fine adjustment Instrumentation ball valves required valve port opens gradually become larger, maximum energy from the closed to open continuously adjusts. Needle valve plug that is able to achieve this function. Needle valve plug generally hardened steel with a long needle, while the seat is made of tin, copper and other soft materials. Valve needle and valve seat seal between the conical surface is depend on the close coordination to achieve. Taper needle valve 60 with 1:50 and two kinds of cone angle, cone surface after fine grinding. Stem and the valve seat seal between is to achieve by the bellows.

Processing Considerations high pressure pipe fittings

Wenzhou high-pressure pipe parts replaced by normalizing annealing process is more economical. Let's say for processing Notes on stainless steel elbow, stainless steel elbow made of stainless steel, it is the most representative of the characteristics that is does not rust. No rust is closely related to the operation time, the time change will occur in different colors. Change the order of the color is brown, gold, red, purple and green. The process is especially a big galvanized elbow connection.
Wenzhou Banda Tube Manufacturing Co. production of tees, reducers, high-pressure pipe is generally used in the steam pipe branch at the trunk, to provide users with the necessary heat source means more nodes in the process, our products have unique technology processing experience, can provide the best advice to users, under normal circumstances, in the three-way or four-way point, set a fixed point, in order to ensure the stability of the pipeline, the other in a natural setting on the branch line to reduce the compensation of trunk Thrust. (FD-LOK Metal Gasket Face Seal Fitting) means a pipe with elbow (flange or access disk). It may be cast from (Figure Reserved), but also by screwing or welding composition.
Two sealing surface of the bolt flange gasket pressed against each other and form a seal, but it also led to the destruction sealed. To maintain the seal, sometimes you have to maintain a huge rally to make welded joints, shock, bending tests. The test was completed by the test plate. The test plates with the best seam welded together into a cylindrical vertical, in order to ensure quality, high efficiency, low labor intensity characteristics.

Stainless steel tube pipe market heating up prospects

Led the development of technology to improve people's living standards, self-health awareness has increased a lot. In daily life, the use of "safe" and "healthy" products are the most modern topic of concern. The pursuit of health and lifestyle of modern people more and more use of stainless steel pipe fittings, polyethylene and other green pipe.
Drinking water quality and water is one of the people most concerned about the topic.  FD-LOK 37° flared tube fittings is generally easy to rust, corrode, leak, easy to scale, and so fatal weakness. Therefore, the stainless steel dry pipe does not rust, no corrosion, no leakage, no scaling features to get people of all ages about. Some developed countries also have developed legislation prohibiting the use of galvanized steel pipe used as a drinking water conveyance.
Fashion green pipe stainless steel pipe and other sales activity, sales booming, some products also appeared in short supply, has become a new growth point of national economy. Market survey, FD-LOK stainless steel tube fittings is the fastest growth in 2002 and 2003 production, and extraction that is expected to exceed the amount of 3.5 million tons or more.

Stainless steel pipe fittings during the winter rainy period Notes

In the current building are often used FD-LOK socket weld fittings, such as clamps, elbows, etc. are commonly used, these are of FD-LOK o ring face seal fitting outdoors when not know if you have had time to consider outdoor stainless steel pipe fittings Construction of rain What issues should pay attention to.
Normally outdoor water supply FD-LOK flared tubing fittings Construction in the rain, especially in the basement should be dug drain gutter, sump, ready pumps, hose and other pumping equipment for pumping, to prevent rainwater soak idler avoid drift tube accidents, construction After completion shall promptly backfill. Then how to deal with it in the special period? Like the rain in the winter period, when more should pay attention to:
(1) Asbestos cement interface hot water mixing materials should be used, but the water temperature should not exceed 500C, such as expanded when cement interface and the water temperature should not exceed 350C;
(2) when the temperature is below -50C, not suitable for the above two material interfaces,
(3) the interface is completed, can brine mixing slime seal conservation, and good cover straws son. Soil can also be warm (not frozen soil) landfill interface insulation;
(4) pressure test, should be exposed pipe or interface with a straw mat Gaiyan no interface tube body should backfill pressure test is completed as soon as the water put the net, do the preparatory work before the pressure test and pressure test After drainage, drainage and other work.

Stainless steel pipe installation techniques are the following nine considerations:

1, FD-LOK stainless steel tube weld fittings, not in direct contact with other metals, wood or rubber should be padded panels and other non-metallic materials.
2, pipe cutting allowed to use ordinary grinding wheel cutting, should be made of stainless steel special grinding wheel or plasma cutting.
3, the inner side of the weld should be filled with argon protection stainless steel pipe and tube tack welding.
4, arc and ending arc, arc welding method using back, crater should be filled crater. Arcing must be completed within the groove, is prohibited in pipes, fittings base metal surface arcing and arcing. If the arcing found at the crater holes, cracks and other defects should be promptly dealt clean.
5, stainless steel pipes, pipe fittings and FD-LOK stainless steel fittings, pipe fittings to connect with non-stainless steel pipes, pipe fittings, welded butt joint backing tube and the cavity should be filled with argon, in order to carry out TIG welding before.
6, multi-channel multi-arc welding, the arc of the income should be staggered.
7, stainless steel continuous welding, interlayer temperature does not exceed 60 ℃.
8, pipeline welds at weld after welding to pickling and passivation.
9, FD-LOK Stainless steel pipe fitting hydrostatic test water temperature and water quality have certain requirements, which shall not be less than 5 ° C water temperature; chloride ion content in water shall not be greater than 25Pmm.

The working principle of the instrument valve

Instrument manifoldsvalves: an analog signal conditioner, also known as analog instrumentation valves. It determines the form of controlled object simulation measurement values of the parameters and the deviation of a given value, and adjusted according to certain rules to generate analog output signals to promote the implementation used to eliminate bias, the controlled parameters remain near or predetermined rules change value in a given. In automatic Instrumentation ball valve , the instrument valves are often used to detect the output signal of a comprehensive instrument to achieve the purpose of controlling the production process. The adjustable parameters including temperature, pressure, flow, liquid level, component etc.. Classification of instrument valve instrument valve used in accordance with the energy into pneumatic instrument valves instrument valves and hydraulic valve three types of electric meters; in accordance with the principles and structure can be divided into self instrument valves, instrument valves adjusted base type, simple adjustment instrument valves, unit combination assembly type meter valve and integrated control device. Instrument valve according to regulation and divided into two Instrument Valves instrument valves ratio PI (proportional integral Instrument Valves instrument valves instrument valves), PID (proportional integral derivative controller), feedforward meter valve.

Male female connection line

Male female connection line is very simple, is a connecting line of a male Male connector and a female head Male connector component, known as the male female connection line. Male female connection line we common is DC line, public bus terminal, used for LED lamp and the driving power supply connection. DC public bus is injection molding, DC is the head of the welding is good, then the injection can be processed, public bus terminal, the terminal is cold pressed online material, and then inserted in the male and female connector inside, has become a public bus terminal. The public bus is convenient repair and maintenance, such as lighting a bad driver, a driver can directly, no need of welding.

Trunnion ball valve using the principles of

Trunnion ball valve is guaranteed by the pressure poorly. Flat stack valve to valve flatness and smoothness requirements friction plane quite high, and the requirements for the use of materials Instrument needle valve also have high demands. To solve these problems, flat lamination stack valve using a ceramic substrate under the topsheet other using a high-strength wear-resistant material, in full accordance with the principles of chemical mechanical seal manufacturing and processing, both to ensure a reasonable contact surface, and ensure the minimum coefficient of friction. Trunnion ball valve has emerged cause Valve manifolds quality problems due to prolonged blockage of the pilot hole, the pressure relief valve stem causing the valve stem is stuck adsorption of iron particles and other issues, through the use of market information and feedback, developers have learned Trunnion ball valve actuators Division is currently unsuitable water quality of water use. Thus, the developers turned to the ball and flat stack valves. Now use the ball a little more.

Trunnion ball valve of the main features of which

The main features of Trunnion ball valve is its own compact, reliable sealing, simple structure, easy maintenance, regular spherical surface and seal in the closed state, the media can not easily be eroded, easy operation and maintenance for water, solvents, acids, and natural gas general working media, but also suitable for harsh working conditions of media, such as oxygen,Instrument needle valve hydrogen peroxide, methane and ethylene, in various sectors has been widely used. Trunnion ball valve is mainly used to cut off or turn on the line of medium, can also be used to regulate and control the fluid,Instrumentation ball valve which has a very hard seal between the V-ball ball core with its V-shaped carbide hardfacing metal seat strong shear force, especially for fiber-containing, small solid granule and other media. And Trunnion ball valve on the pipeline flexibility to control not only the confluence of media, streaming, and flow switch, but also to close any channel leaving the other two channels are connected.

Trunnion ball valve preservation method described

Trunnion ball valve body's first anti-corrosion, the main choice of stainless steel, carbon steel. Although anti-corrosion materials is very rich, but whether the election was appropriate or not an easy thing, because the corrosion problem is very complex.Valve manifolds Choose body material difficulties, lies not only consider the corrosion problem, but must consider the ability to withstand temperature, whether economically justified, is it easy to buy and other factors. Followed Trunnion ball valve liner take measures, such as lead-lined, Instrument needle valve lining aluminum, plastic lining, the lining of natural rubber and synthetic rubber and the like. The medium conditions permit, This is an economical way. Again, under pressure, the temperature is not high,(Check valve) made with non-metallic valve body materials can often be very effective corrosion prevention and control. In addition, Trunnion ball valve has an outer surface exposed to atmospheric corrosion, general steel materials to paint to protect.

Features Trunnion ball valve is constructed

Trunnion ball valve stem through the flat keys or splines or square convergence deed with the handle, versatile,Trunnion ball valve convenient disassembly. Stainless steel ball valve stem with anti-blown construction. High-pressure valve packing selection knitting, flexible graphite seals or tetrafluoroethylene-ene ring, so that to achieve robust stainless steel ball valve stem seals must be smooth in the case. Based on need, high-pressure valve can be planned into the anti-static structure, providing a conductive spring between the ball and the Double ferrule fitting  stem and the valve, to prevent static sparking extinguish flammable materials to ensure system safety. Trunnion ball valve seal vice situation varied. Trunnion ball valve task truth is by reversing valve love to make valve dredge or occlusion. Valve switch light, small size, can be made very large caliber, reliable sealing, simple structure, convenient maintenance,(Instrument needle valve) regular spherical surface and seal in the closed condition, can not easily be eroded media, in all sectors lost universal use.

Trunnion ball valve elastic ball valve

The ball valve is elastic. Ball and seat ring are made ??of metal materials, sealing pressure than large, rely on the media itself has reached less pressure sealing requirements must apply force. This valve is suitable for high temperature and pressure medium. Elastic sphere is the sphere in the lower end of the inner wall of the opening of a resilient groove, Instrument valve and access flexibility. When closing the channel, wedge-shaped head with a stem so that the ball up on and the valve seat seal. Before turning the ball first release wedge-shaped head, the ball followed by restoration of the original prototype, so there is very small gap sealing surface can reduce friction and operating torque between the ball and the valve seat. Ball position can be divided according to their straight-channel, three-way and the right angle. After two ball valves for dispensing media and change the flow of the medium. Ball O-Ball and V-ball points. O type ball floating structure, ball core for precision castings, hard chrome plated exterior,Double ended cylinder seat with PTFE material, the same stream crossings and pipe diameter, maximum flow capacity, flow resistance is extremely small, closed without leakage, generally do switch valve, especially suitable for high viscosity, fibrous, granular media; V-ball with a fixed structure, opened a V-notch ball core, can achieve proportional control, flow characteristics such as the approximate percentage. Depending on the choice of process equipment pneumatic or electric actuators, pneumatic valve and were composed of electric valve, which pneumatic valve as required to achieve the proportional control valve with positioner, electric valve as required to achieve the selected electronic proportional control electric actuator or with servo amplifiers.

Trunnion ball valves

Two-axis ball belongs to the high-pressure Trunnion ball valve  series, the compact features of the structure of the Instrument needle valves, appearance, maximum flow rate, low operating torque, enabling 2-way and 3-way path, enabling the panel installation, enabling pneumatic and electric actuators, important about seeking law instructions, ball unused for some time may have a higher initial torque to open all series ball valves are bi-directional test using nitrogen at the factory. The maximum allowable leakage test pressure the ball for the simple task can not be detected leaks.

Advantages of manual ball valve

High pressure ball valve is a relatively new type of ball category , it has its own unique structure of some advantages, such as switches without friction , sealing easy to wear, a small opening and closing torque . Such actuators can be reduced with the specifications. With multi-turn electric actuators , can be realized on media regulation and tight cut . Widely used in petroleum, chemical, water supply and drainage and other cities demanding cutting conditions.
Manual valve in the pipeline is mainly used for cutting, distribution and change the flow direction of the medium. Ball is a new type of Instrument needle valve is widely used in recent years , it has the following advantages:
1 . Fluid resistance , its drag coefficient with the same pipe length equal.
2 . Simple structure, small size, light weight.
3 . Close and reliable valve sealing surface material widely used plastic , sealing, has also been widely used in the vacuum system .
4 . Easy to operate, opening and closing rapidly , from fully open to fully closed as long as the rotation of 90 °, to facilitate remote control .
5. Easy maintenance , simple High pressure ball valve , seals are generally activities , removal replacement is more convenient.
6. When fully open or fully closed, the sealing surface and the dielectric isolation ball and seat , through the media , will not cause erosion of the valve sealing surface.
7 . Wide range of applications , from small diameter to a few millimeters to a few meters from the high vacuum to high pressure can be applied . When the ball is rotated 90 degrees , in the import and export of office should be fully rendered sphere , thus cutting off the flow.

The performance advantage of the fixed ball valve:

1, the operation is labor-saving: ball support, composed of upper and lower bearings to reduce friction, due to the elimination of the great seal load inlet pressure to promote the ball with the sealing seat formation caused by excessive torque.
2, reliable sealing performance: PTFE unisexual material sealing ring is embedded in the Stainless steel needle valves seat, metal seat end with the spring to ensure adequate pre tightening force of sealing ring, valve sealing surface is abraded during use, in the spring under the action of the valve to ensure good sealing performance.
3, structural fire protection: to prevent the sudden appearance of heat or fire, burn the PTFE sealing ring, large leak occurred, and contribute to the fire, in the ball and Needle valve seat sealing ring is arranged between the fire, when burned in the ring, under the action of the spring force, will quickly push the ball valve seat sealing ring, the formation of metal and metal seal, to a certain degree of sealing effect. Fire test to meet the requirements of APl6FA and APl607 standard.
4, automatic pressure relief feature: when the medium pressure cavity inside the valve is much higher than the pre] spring force, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatic complex
5, a drain line: all set vent valve body, valve seat can check whether leakage occurs in the work, the valve is fully open or fully closed, remove the pressure in the chamber, can be directly replace packing; can cavity left in emissions, reduce pollution medium on the valve.

Stainless steel needle valve exterior feature presentation

Stainless steel needle valve simple structure, small size, resistance to fluid flow is small, the disadvantage is turned on or off too quickly, it will produce water hammer (when a sudden change in the flow velocity in the pipe pressure will rise) in the pipeline. Instrument needle valve Therefore should not be used in the main pipe valve, available in dry, or the end of the branch pipe for wash-use, flushing sewage effect. Including the development of iron and steel, sealing materials, and mechanical processing industries will have a significant impact on the level of technical parameters of the valve. Stainless steel needle valve of strength, ductility,High pressure ball valve  corrosion resistance, resistance to high pressure directly affects the valves, corrosion resistance; production level determines the valve sealing material applicable to medium and can withstand the pressure; precision machining is the impact of the interface seal, the valve head and an important factor in seating levels.

Stainless steel needle valve structure in the form of presentation

Stainless steel needle valve pneumatic device safe, reliable, low cost, easy maintenance, the structure of the valve drive a big branch. World Valve Network Xiaobian for you Instrument needle valves in detail the structure of the valve pneumatic device technology requirements and performance requirements for reference. Structural technical requirements valve pneumatic device: the pneumatic cylinder by means opening indication, stroke limit, pneumatic components, manual mechanism, signal feedback and other components. Pneumatic device with a buffer mechanism, the stroke length of the buffer mechanism can refer to Table l requirements. Buffering mechanism with adjustable pneumatic devices, there should be external to adjust its buffer cylinder body. Stainless steel needle valve with Instrument valve manifolds manual mechanism in the gas supply is interrupted, the valve should open and close operations can be performed manually institutions, while facing the hand wheel, hand wheel or handle counterclockwise rotation of the valve should open the valve clockwise turn off. Rod ends for the inner and the outer thread, there should be a standard spanner wrench applicable mouth. Piston seals should be easy to replace and repair. Stainless steel needle valve when the main line in the pipeline and gas pipeline buried in the ground in the need, the need to use full bore welded ball valve.(Double ferrule fitting)  in the wider application of irrigation systems, mainly used in the branch entrance. Ball simple structure, small size, resistance to fluid flow is small, the disadvantage is turned on or off too quickly, it will produce water hammer (when a sudden change in the flow velocity in the pipe pressure will rise) in the pipeline. Therefore should not be used in the main pipe valve, available in dry, or the end of the branch pipe for wash-use, flushing sewage effect.

Stainless steel needle valve is the instrument to measure the pipeline system is an important part of

Its function is turned on and off the pipeline path. Good sealing needle valve, needle valve long service life, even after the needle valve sealing surface damage, needle valves only need to replace wearing parts, needle valves can continue to use. Needle valve should be installed so that the flow is consistent with the direction of the arrow on the valve body medium. Needle valves are often used with pressure transmitters, Trunnion ball valves flow meters and other ancillary equipment. Stainless steel needle valve is used to adjust the carrier gas flow rate, and some instruments use it to control the flow of gas and air. Adjustment handle on a connection in a straight shaft, which stem in the lower end of the shaft that was pointed cone valve needle 5, by changing the relative position of the valve needle valve to control the flow. When adjusting the handle rotated in a counterclockwise direction,Instrument needle valve the gap increases with the valve needle valve, gas resistance decreases, thus increasing the outflow from the needle valve gas flow. When adjusting the handle is turned clockwise, the valve needle valve seal will hold him down, the needle valve is closed. Embed a fluorine rubber gasket groove in the middle of the stem. I.e., the seal ring 4, and its surface is coated with silicone vacuum grease, the stem moves when the seal ring is always in close contact with the inner wall of the valve body, the valve body to maintain a sealed state when the needle valve is not working, the needle valve should be full (this point and the regulator valve opposite) to prevent the valve needle stuck in the valve inlet seal also prevents the spring prolonged pressure and failure.

Profile stainless steel needle valve

Stainless steel needle valve is the instrument to measure an important part of the piping system , the main shut-off valve and ball High pressure needle valve , its function is to be used to turn on or off the pipeline path .
Card sets with easy installation and removal instrument valves , connections are tight , there is conducive to fire , explosion and high voltage capability , good sealing performance, etc., are power plants, oil refineries, chemical plant piping and instrumentation to measure an advanced connection valve. This type valve in the pipe should generally be installed horizontally.
Stainless steel needle Instrumentation ball valve sealing a good , long life, even after the sealing surface is damaged, only need to replace wearing parts , you can continue to use.
Should be installed so that the flow is consistent with the direction of the arrow on the valve body medium .
1 , needle valves standards , needle valves with easy installation and removal , needle valve connections are tight , the needle valve is conducive to fire , explosion and needle valve high pressure capability . Needle valve sealing performance advantages of a good valve power plant , oil refinery, chemical plant piping and instrumentation to measure connection in an advanced way . Good sealing needle valve , needle valve long service life , even after the needle valve sealing surface is damaged , needle valves only need to replace wearing parts , needle valves can continue to use. Needle valve should be installed so that the flow is consistent with the direction of the arrow on the valve body medium . Needle valve is a valve can be precisely adjusted broader purposes such as flame cutting with the cutting from the flame temperature adjustment knob is needle valves, instrumentation needle valve instrument measuring the piping system is an important part of the main needle valve there are shut-off valves and ball valves , needle valves whose function is to be used to turn on or off the pipeline path .
Stainless steel needle valve base on self-designed structure , is currently the most popular new generation valve.
First, the body 's anti-corrosion, mainly correct selection of materials . Although corrosion data is very rich, but whether the election was appropriate or not an easy thing , because the corrosion problem is very complex. Choose body material difficulties, lies not only consider the corrosion problem , but must consider the ability to withstand temperature , whether economically reasonable , is it easy to buy and other factors .

The performance advantage of the fixed ball valve

1, the operation is labor-saving: ball support, composed of upper and lower bearings to reduce friction, due to the elimination of the great seal load inlet pressure to promote the ball with the sealing seat formation caused by excessive torque.
2, reliable sealing performance: PTFE unisexual material sealing ring is embedded in the stainless steel Stainless steel needle valve seat, metal seat end with the spring to ensure adequate pre tightening force of sealing ring, valve sealing surface is abraded during use, in the spring under the action of the valve to ensure good sealing performance.
3, structural fire protection: to prevent the sudden appearance of heat or fire, burn the PTFE sealing ring, large leak occurred, and contribute to the fire, in the ball and valve seat sealing ring is arranged between the fire, when burned in the ring, under the action of the spring force, will quickly push the ball valve seat sealing ring, the formation of metal and metal seal, to a certain degree of sealing effect. Fire test to meet the requirements of APl6FA and APl607 standard.
4, automatic pressure relief feature: when the medium pressure cavity inside the Instrument valve manifolds is much higher than the pre] spring force, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatic complex
5, a drain line: all set vent valve body, valve seat can check whether leakage occurs in the work, the valve is fully open or fully closed, remove the pressure in the chamber, can be directly replace packing; can cavity left in emissions, reduce pollution medium on the valve.

Valve

The High pressure needle valve is in fluid system, a device used to control the direction of the fluid flow, pressure, is to make the piping and equipment within the media (liquid, gas, powder) device for controlling the flow of energy flow or stop and the.
The Instrumentation ball valve is a pipeline control unit of fluid delivery system, which is used to change the channel section and flow direction of medium, with diversion, cut-off, throttling, check, diversion or overflow relief functions. For fluid control valves, valve from the simple to the extremely different kinds of valve control system used in complex, its many varieties and specifications, the valve nominal diameter pipeline industry from large to tiny instrument valve diameter up to 10m valve. Can be used for the control of water, steam, oil, gas, mud, all kinds of corrosive medium, the liquid metal and radioactive fluids and other types of fluid flow, the valve working pressure is from 0.0013MPa to 1000MPa of ultra high pressure, working temperature from ultra low temperature to high temperature of 1430 DEG C -270 C.
The control valve can use a variety of transmission, such as manual, electric, hydraulic, pneumatic, pneumatic turbine, electromagnetic, electromagnetic hydraulic, electric hydraulic, pneumatic and hydraulic, gear, bevel gear drive; in pressure, temperature or other forms of sensor signals under the action, according to the requirements, or not depends on the sensing signal and a simple open or closed, the valve to rely on drive or automatic mechanism to make the opening and closing parts for lifting, sliding, rotating or turning motion, so as to change the size of the flow area to achieve the control function.