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     ZHEJIANG LONGCHENG VALVE CO.,LTD. 

     About this company : Zhejiang Longcheng Valve Co.,Ltd is located in well-known China Pump & Valve hometown— Five–star industrial zone, Oubei town, Wenzhou. The company, established in 1989, belongs to the first-steep provider net of China Petroleum & Natural Gas Group, the pointed manufacture company of the Chemical Industry Equipment Corporation, and the member of CHINA CITY GAS ASSOCIATION . The company covers an area of 4500 square meters and the construction area is 3400 square meters. It has become a valve company which integrates Researching, manufacturing, designing,sales and after services as a specialized unit. The company has advanced machine equipment, owns workshops for numerical control, heat treatment, jointing, assembling, testing etc. We also owns the workshops for the steam trap、 the forged gate valve and the globle valve, etc.Our major products are:Free-ball float trap、Hot-motive force steam trap、Inverted bucket steam trap High temperature&pressure disc steam trap、Adjustable bimetal elements trap、Lever-ball float steam trap and the gate valve 、globe valve、check valve and the ball valve、butterfly valves etc.The company can produce “American Standard”ANSI,”Japanese standard”JIS,” Chinese standard”GB valve.

     Contact : Emily Xiang, Sales Assistant 
     Headquarters : Five-star Industrial Zone,Oubei, Wenzhou, Zhejiang, 325102, China
     Phone : 86-577-67372257 67372258, Fax : 86-577-67372256  
     Website : Log on to trade instantly , Email : Log on to trade instantly

     API globe valve API globe valve

Application Face to Face Dimensions ANSI B16.10 Basic Design BS1873 End Flange Dimensions ANSI B16.5 Test Standard API598
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     Adjustable bimetal elements trap Adjustable bimetal elements trap

Bimetal elements trap is the firmest of structure in hot-static traps. Its advantage is: anti-water hammer, bear high pressure, the volume is small, the weight is light, endure frozen, can automatically release the air, can install in any position; The rate of back pressure rate is bigger than 80%. It is widely usage in steam pipeline, steam heat tracing pipe, gage heat tracing pipe, heating for daily life and the heating equipment of high temperature condensate water. Feature May adjust the temperature of condensate water discharges, make use of the sensible heat of condensate water effectively. In front of the valve has condensate water all the time, forms water-sealing, without steam leakage. the free position installment, and may adjust the draining water temperature at any moment. anti- water hammer, good release capability. It has long usage circle for the way of ball face to close Working principle Bimetal elements trap is carries on-off of valve by the bimetal elements temperature sensing element impetus valve core. When the device starts, pipeline appears low temperature condensate water, the Bimetal elements are flat and smooth, the valve core is in opened position by the elasticity of spring. When the temperature of condensate water gradually rise, t Bimetal elements temperature sensing element becomes bending and distortion to push the valve core to closure. The trap completely closed before the condensate water reach saturated temperature. It has the high temperature condensate water before working, without the steam leakage,the energy-saving effect is remarkable.
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     API CHECK VALVE API CHECK VALVE

Application Face to Face Dimensions ANSI B16.10 Basic Design API6D&BS1868 End Flange Dimensions ANSI B16.5 Test Standard API598
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     API gate valve API gate valve

Application Face to Face Dimensions ANSIB16.10 Basic Design API600 End Flange Dimensions ANSI B16.5 Test Standard API598
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     Bell type ball float trap Bell type ball float trap

Bell type ball float trap Features and property: 1. It is adapt to the condensate water that can intermittent draining or continuous draining. 2. The unique designed SCCV closure system has the function of compensating the error Which produced by the lever machinery. It avoids the rigid collision when closing and The service life is long. 3. The inter parts are made by stainless steel and install on the valve bonnet. So its maintenance Is convenient. 4. The backpressure rate is9%. 5. The steam and water can be reliably separated: (water and steam entering across the U channel under the valve). There is no steam leakage for the valve in water sealing. 6. The opened float can anti-water hammer and it has air vent in the bucket so that it can prevent Steam lock and air block. (The high temperature non-condensate air also can be exhausted. Usage It is applicable in the main steam pipe, the divided cylinder, the heat interchanger, the hot-blowing blast type dryer, the cylindrical dryer, the distiller, the concentration equipment, the hospital-use sterilizer and so on. The subminiature and light ES5 is suitable for the air conditioner, washing machine and so on. The complete stainless steel ESU5 is specially used in Food industry, the hospital steams equipment manufacture. The Distillers The wearable SCCV closure system SCCV closure system is the abbreviation of self-closing and center-ring valve system. This closure system broke through the traditional design, ingeniously uses the suction of condensate water when flowing out and the pressure in the valve to close the valve core. It makes the valve core slowly when closed and reduces attrition between the valve core and valve seat.
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     Bell type float(inverted bucket) steam trap  Bell type float(inverted bucket) steam trap

Bell type float (inverted bucket) steam trap Features and property: 1. It is adapted to the condensate water that can intermittently draining or continuous draining 2. It is small volume but large draining because of the double valve seats differential pressure Machine and SCCV closure system.. 3. The inter parts are made by stainless steel and install on the valve bonnet. So its maintenance Is convenient. 4. The back pressure rate is 90% 5. The steam and water can be reliably separated: (water and steam entering across the U channel under the valve). There is no steam leakage for the valve in water sealing. 6. The opened float can anti-water hammer and it has air vent in the bucket so that it can prevent Stream lock and air block.(the high temperature non-condensate air also can be exhausted) 7. It can be high-pressure valve combine with lever machine. The double valve seat differential pressure machine and SCCV closure system It has long usage life for the double valve seat differential pressure machine and SCCV closure system are installed in the same part. When the capacity of condensate water increases, the bucket loses the buoyancy to cause the machinery reverse sealing and have the differential pressure. The main valve opens and has great displacement, starting steam equipment rapidly, displaying the machine’s best thermal efficiently.
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     Bellows steam trap Bellows steam trap

The bellow seals steam trap is the most economical and experimental energy-saving trap in the hot-statical force trap. Its merits are: small volume, light weight, no fearing about the frozen, can automatically exhaust the air, free to install everywhere; The rare of back pressure will be larger than 80%, the stainless steel bellow seals-pipe can expands widely and good adjustment, this valve is equipped with the adjustable bolt, may adjust the application temperature according to requirement, the general subcooled temperature is lower than the saturation temperature 18 ℃ -40 ℃ 。 The bellow seals steam trap is suitable for the steam pipe network heating-concomitant、the meter heating-concomitant, heating for the living and allows to have the high temperature coagulation water heating equipment to sending the water, the scope of using it is very wide. Characteristic/ Trait The Stainless steel bellow seals-pipe is firm and durable; what’s more the service life is long too. May adjust the draining temperature of the condensing water, can use the Sensible heat,, the energy saving effect is remarkable. The valve has the condensing water throughout, forms the reliable hydraulic packing and will not have the steam to divulge. It is not affected by the vibrating, the undulation of steam pressure and the influence of the water hammer. The free angle installation, and no installed position limit, and the performance of exhausting is fine. Simple structure and has the filtrating equipment, facilitates for installment and the maintenance. Working Principle The internal structure of the bellows seal steam trap is mainly a stainless steel bellows seal pipe for movement part, inside it is one kind of liquid whose boiloff temperature is lower than the water saturation temperature. When the equipment start, the pipeline appears the cooling condensing water, the liquid inside the bellows seal pipe is at the condensation condition, the valve core in opens position with the spring tension. When the temperature of the condensate water raise gradually, the fluid inside the bellows seal pipe starts to evaporation and inflation. The inner pressure increased .Then it is distorted with elongates to drive the valve core to the closure traverse before the condensating water reaches the saturation temperature, the trap will shut down completely. In the foreside of the valve, it has the high temperature coagulation water throughout, without any steam to divulge, the energy-saving effect is good.
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     Bimetal elements trap Bimetal elements trap

Bimetal elements trap General purpose bimetal elements trap has four kinds of function: 1. Let out the air and water: The pressure or the gravity of the transporting pipeline Causes the valve to open then rapidly deaerate the air and the water to reduce the time Of heating up the temperature. 2. anti-steam: The steam which has entered into the cavity of the valve will causes the bimetal elements to be curving to produce the hot drawing force and overcomes the pressure of the pipeline to closes the valve ball. The hot drawing force is changed along with the corresponding of saturated steam curve, so in its scope of pressure all can be the effective work. 3. Discharge the condensate-water: The condensate water has gradually changed the hot Drawing force of the bimetal part and caused the discharge hole to open graduallu,in that Way, the condensate water will has unimpeded discharging. 4. To have the function of the check valve: The valve ball will immediately shut down The discharging hole when the pipeline has the back flow and does not need the accessory Component.
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     Disc steam trap Disc steam trap

Disc steam trap is according to Bernoulli thermodynamic theory, with the different characteristic of thermodynamic steam and condensate water, bring the kinetic energy and potential energy changeable. The valve disc starts to on and off for the disc fluctuate differential pressure. so anti-steam drain. Feature The volume is small, the weight is light, is installed in any position The material is stainless steel, durable, anti-corrosive. It will adapt in cold condition, endures water hammer, bears the heat. The subcooled temperature is 8 ℃, the steam leakage is less than the actual displacement 3% Maximum back pressure 50%. The structure is simple, the installment and maintain is convenient. Working principle It has a disc in trap which is a sensor as well as actuating member. When the device starts, the cooling condensate water appears in the pipeline. The condensate water rapidly discharge depends on the working pressure push the valve disc. When condensate water discharging finished, the steam enters in the trap. The steam volume rapid expansion, caused fluctuate differential pressure of disc because velocity of flow of steam bigger than the condensate water, the valve disc rapid closed by the suction of the steam velocity of flow. When valve disc closed, the disc has two sides pressure. The stress under the disc is smaller than upper for the pressure in the steam-box originates from steam pressure and the disc close tightly. When the steam in steam –box cooled down to condensate water, the pressure in steam-box disappear. Condensate water push the disc by working pressure, condensate water continues to discharge, circulation work, interrupted draining water.
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     Forged Steel Cryogenic Valve Forged Steel Cryogenic Valve

RONZEcryogenic valves are available in three bonner designs.The first design is the Bolted Bonnet,with male-female joint,spiral woundgasket,made in F304L/graphite.Ring joint gasket are also available on request.The second design is the welded bonnet,with a threeded and seal welded joint.On request a full penetraion strength weldedjoint is avaliable. The cryoginic valves are available in gate and globe design configurations.Valves are designed with an extended bonnet for use in cold serves to - 196 degress C(-320 degrees F). Cryogenic Valve Design Construction and Specifications RONZE Cryogenic gate and globe valves conform to API 160. Each are tested according to API 598,and marking is per MSS SP-25nstruction is as follows: Full Port Conventional Port Two piece self-aligning packing gland Bolted bonnet with spiral wound gasket,threaded and seal welded bonnet Integral backseat Pressure relief hole on seat (for Gate Valves only) Socket weld ends to ASMB B16.11 Scrwed Ends(NPT) to ANSI/ASMB B1.20.1 Special extension lengths on request Soft seats for globe valves on request PTFE stem for globe valves on request Special low temperature testing on request Outside Screw and Yoke (OS & Y)
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     Forged Steel Extended Body Valve Forged Steel Extended Body Valve

RONZE extended body valves are avaiable in two bonnet designs.The first design is the Bolted Bonnet,with male-female joint,spiral wound gasket,made in F304L/graphite.Ring joint gasket are also availble on request.The second design is the wilded bonnet,with a threaded and sealjoint.On request a full penetration strength welded joint is available. Extended Body Valve Design Construction and Specifications RONZE extended body valves conform to API 602. Each are tested according to API 598,and marking is per MSS SP-25nstruction is as follws: Two piece self-aligning packing gland Integral extended body with threaded,socket weld or butt weld connection Bolted bonnet with spiral wound gasket or threaded and seal welded bonnet Integral backseat Socket weld ends to ASMB B16.11 Screwed Ends(NPT) to ANSI/ASMB B1.20.1 Outside Screw and YOke (OS &Y)
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     Forged Steel Globe Valves Forged Steel Globe Valves

RONZE valves are available in Three bonnet designs.The first design is the Bolted,with male-femalejoint,spital wound gasket,made in F304L/graphite.Ring joint gasket are also available on request.The second design is the welded bonnet,with a thteaded and seal welded joint.On request a full penetrationstrength welded joint is available.The third design is the pressure seal bonnet,with a threaded and pressure seal bonnet joint. Globe Valve Design Construction and Specifications RONZE globe valves conform to API 602,and ASME B 16.34 Each are tested according to API 598,and marking is per MSS SP-25. Construction is as follows: Full Port or Convintional Port Outside Screw and Yoke(OS & Y) Two piece silf-aligning packing gland Bolted bonnet with spiral wound gasket,threaded and seal welded bonnet or threaded and pressure seal bonnet Integral backseat Loose solid disc Socket weld ends to ASME B16.11 Screwed Ends(NPT) to ANSI/ASME B1.20.1
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     Forged Steel Integral Flanged End Valves Forged Steel Integral Flanged End Valves

RONZE integral flanged valves are avaiable in three bonnet designs.The first design is the Bolted Bonnet, with male-female joint,spital wound gasket,made in F304L/graphite.Ring joint gasket are also available on request. The second design is the welded bonnet,with a thresded and seal wilded joint.On request a full pen- etration strength welded joint is available.The third design is the pressure seal bonnet,with a threaded and pressure seal joint. Integral Flanged end valves are available in gate,globe,piston check,and swing check design configurations. Integral Flanged End Valve Design Construction and Specifications RONZE integral flange valves conform to API 602,and ANSI B16.34. Each are tested according to API 598,and marking is per MSS SP-25. Construction is as follows: Full Port and Conventional Port Face to face according t ANSI B16.10 Flanges according to ANSI B16.5 Pressure seal bonnet Outside Screw and Yoke (OS & Y) Two piece self-aligning packing gland Integral backseat Integral body flanges Butt Welded Ends to ASME B16.25 RTJ bonnet gasket ring joint type Bolted bonnet with spiral wound gasket,threaded and seal welded bonnet or threaded and pressure seal bonnet
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     Free-ball float trap Free-ball float trap

Free-ball float steam trap is one of the most advanced steam traps in our country at present, the technique and manufacturing craft of the product have reached the level of the same product in international. It can insure the sealing property of the trap for the high precision of the ball float. The whole ball face can be the sealing face and the usage cycle will be longer. The distinct advantage of free-ball float steam trap is that it is smart and has high working ability to choose the inner air release valve which makes the usage life of the free-ball float steam trap longer. The most prominent advantage of the free-ball float steam trap is that it doesn’t affect by the pressure, temperature and the flow of condensate water. It continuously draining and draining in case there is any water. The lowest subcooled temperature is 0 oC. And it can make the heating equipment reach the best work efficiency. The minimum operating pressure is 0.01Mpa. The maximum rate of back pressure is ≤85%. This product is the most optical trap to applicable to the petroleum, chemical industry, printing and dying, pharmaceutical industry, paper making and foods. . Specification and technical parameter Nominal diameter ( DN ): 15-150 Nominal pressure( PN ): 1.6-4.0Mpa ; Maximum operating pressure(PMO) : 0.2-1.6 Mpa ; Maximum operating temperature (TMO) : 350 ℃; Operating medium: steam condensate water Rate of no-load steam loss less than 3%Subcooled temperature 0.5% Maximum operating pressure Working principle The construction of free-ball float steam trap is simple that only has a fine grinding hollow float inside which is ball float as well as disc. There is no wearing parts and has a long usage circle. When the device starts, in the pipeline appeared the air and cryogenic condensate water. The manual air release valve will release the no-condensate air, the trap turn into working situation. The cryogenic condensate water flow into trap, the liquid level of the condensate water rise, the ball float rise, the valve opened. The device will rise the temperature quickly, the air release valve has closed before the temperature in pipe rise to saturation temperature. When the device turn into normal working situation, the condensate water will be decrease, the liquid level will be descend, the ball float will adjust the flow rate of bore along with the liquid level’s up and down. When the condensate water stop entering, the ball float approach the seat along with the medium flow direction, the valve closed. The seat of free-ball float steam trap is below the liquid level and form water sealing, no steam leakage.
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     Free-semi-ball float trap Free-semi-ball float trap

ball float trap is one of the most reliable trap of working capacity in mechanical trap. Its internal structure has only one down-facing semi-ball float bucket for move part. The whole ball face can be sealing face for the semi-ball float bucket through fine grinds. It has long usage circle, can anti-water hammer, does not have the breakdown, durable, without steam leakage and can save energy. This Free-semi-ball float trap widely uses in the steam heating equipment and the steam pipe network condensate water recovery system, is the most advanced steam trap nowadays. Working principle The Free-semi-ball float trap has only one down-facing semi-ball float bucket for move part. The ball bucket is disc as well as sealing. When the device starts, the air in pipe and cryogenic condensate water enter in trap through transmitting tube, the bimetal evacuate parts flick the ball bucket, the valve opened, the air and the cryogenic condensate water rapidly discharged. When the steam enters into the ball bucket which produces upward buoyancy, simultaneously temperature in the valve rise, bimetal evacuate parts shrink, the ball bucket floats to the valve port, the valve closed. When steam in ball bucket turns to condensate water, the ball bucket goes down for losing the buoyancy, the valve opened, condensate water rapidly discharges. When the steam enters to the ball bucket again, the valve closed , interrupted and continuously works. The trap works without steam leakage for the valve seat locates in the water sealing isolately with the steam and water separately. Main property and parts Name of parts Material Property Body、bonnet WCB Minimum subcooled temperature 0 ℃ --3 ℃ semi-ball float 304 Maximum allowable back pressure 80 ﹪ Seat 3cr13 Maximum allowable temperature of Cast steel body 425 ℃ Filter 304
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     High temperature and high pressure disc steam trap  High temperature and high pressure disc steam trap

High temperature&pressure disc steam trap This valve is suitable for the steam pipeline and the steaming equipment. It can prevents the steam to divulge and can remove the condensing water, thus achieve saving energy and prevent the phenomenon of water hammer and stop the possible malfunction which caused by it. The construction features and the using principle (1)Construction features Has the steam or the air attemperator and doesn’t affect by the influence of the ambient temperature, reducing the frequency of the movement, lengthening the life. Has the strainer installation. This valve’s movement is quick and reassuring, the displacement is large. (2)Working Principle This trap uses the characteristic of hot dynamics, when the coagulate water flows to the lower pressure zone it will occur the second time evaporation, and use the difference actuation of viscosity, density between the steam to run the disc. Model specification Type HRF3 HRW3 HR3 HRF150 CS49H-160V HRW150 CS69H-160V ends connection Flange Socket Flange Socket DN{MM} 15 20 25 11 20 25 32 40 50 The Max. Press.. 8 Mpa 150 Mpa The Min. Press.. 0.8Mpa 0.8Mpa Working Temp. 500 ℃ 500 ℃ Material WC6
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     Inverted bucket steam trap Inverted bucket steam trap

Product features All the moving parts of trim are stainless steel which is wearability and anti-corrosive. For the steam cannot arrive to the valve seat hole by the water sealing that does not have steam losing and have highly effective energy saving. It can’t be destroyed and staved because of the Inverted bucket. It can bear water hammer and have a long usage circle. It has air vent in the top of Inverted bucket. It has good performance to continuously vent air to lest Cold lag and aired up. It can’t influence by the back pressure and working well in the high back pressure. It Works reliably, only has two movement parts (lever and Inverted bucket.) so that cannot form hinder. The valve seat and disc are in the top of valve, the valve disc may cause the contamination passing in the on and pass. It has the good self- clean performance and no contamination. . Working principle Inverted bucket steam trap using the density contrast of condensate water and steam to work. The internal structure is lever system connect with inverted bucket. The inverted bucket steam trap has a down facing inverted bucket as hydraulic sensor in order to overcome the steam pressure. When the device starts, in the pipeline appears the air and the low temperature condensate water. The Inverted bucket steam trap is full opening in this time, the condensate water rapidly discharges, the temperature rises quickly. The steam enters into inverted bucket which will produce upward buoyancy and the lever impetus valve core to close the valve. It has one hole in the inverted bucket which releases the air automatelly. When a little of steam discharges from the hole, the remainder steam will form condensate water. The inverted bucket loses the buoyancy and downward, the lever impetus the valve core to open the valve. When the steam enters into the inverted bucket, the valve closed again, circulate working, interrupted draining water.
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     Lever-ball float steam trap Lever-ball float steam trap

The most prominent advantage of Lever-ball float steam trap is that it doesn’t affect by the pressure, temperature and the flow of condensate water. It continuously draining and draining in case there is any water. The lowest sub-cooled temperature is 0 oC. And it can make the heating equipment reach the best work efficiency. It has no steam leakage because the seat of the Lever-ball float steam trap locates below the fluid level and forms water sealing. The minimum operating pressure is 0.01Mpa. The maximum rate of back pressure is ≤85%. It has the air release equipment in the interior, the lever-ball float steam trap adopts automatic air release valve which will release the un-coagulate air keenly. It has high working efficiency and has a long usage circle. This steam trap has balance double valve seats that achieve small area with great displacement. It specially suitable for large heating equipment and heat transfer station equipment anti-steam draining water. It is the first choice of steam trap for large heating equipment. Features / Property It uses the new type valve structure (new SCCV closure way) and has excellent sealing ability and durability. Balance double valve seat design, small but the displacement is bigger than the common steam trap, can display the superiority especially in the big displacement situation. Its interior installs bimetal elements automatic air release valve that can prevent the air block and the steam block. All the parts install on the valve bonnet so that the valve can maintain conveniently without uninstall from tubing. Working principle This valve use double valve hole to reduce the pressure of core when opening and reach the great displacement. The float ball fluctuates along with the change of fluid level when working so that the lever open or close the seat. It has no steam leakage for the valve seat hole locates below the condensate water level and forms water sealing, the water and steam separately. Purpose It widely uses in petroleum, chemical industry, food, papermaking, metallurgy etc. of large steam equipment , high pressure sterilization, air condition equipment, heat exchanger and so on.
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     Membrance-box steam trap Membrance-box steam trap

The hot-statical membrance-box steam trap (steam pressure balance type) is the most commonly use advanced energy-saving trap. Embrance-box steam trap has smart response. It has the high temperature condensate water before working, without the steam leakage,the energy-saving effect is remarkable. Its advantage is: The automatic release air, the volume is small, bear frozen, can install at any position. It maintains conveniently for inspecting, repairing and replacing the parts on the pipeline. The maximum rate of back pressure is ≤ 80%. Its membrance-box is firmly and has a long usage circle. It has a widely usage for steam pipeline, steam heat tracing pipe, gage heat tracing pipe and the anti-small steam displace of heat-up equipment. Working Principle The main actuating member of membrance-box steam trap is metal membrance-box which fills with the liquid of gasified temperature lower than the saturation temperature of water. When the device starts, the pipeline appeared the low temperature condensate water, the liquid in the membrance-box is at the condensation condition, the valve is opened. When the temperature of condenste water gradually rises, the sufficient fluid in the membrance-box starts to evaporate. the pressure in membrance-box goes up, the membrance impetus valve core moves to the closure direction. The trap completely closed before the condensate water reach saturation temperature. The membrance control the valve on-off along with the steam temperature changed for anti-steam drain. It supplies two kinds membrance of the valve temperature is lower than saturation temperature 15 ℃ and 30 ℃ to choose.. Main property and parts Parts name Material Body Bonnet WCB Membrance-box 1Cr18Ni9Ti Membrance Kazak alloy Seat 3Cr13 Filterr 1Cr18Ni9Ti
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