api Cast Steel Gate Valve

Products description: Cast Steel Gate Valve

-Design and Manufacture：Cast steel gate valve to API 600(ISO 10434)or API 6D、API 600；

-Inspection and Test：API 598，API 600 or API 6D

-End flange dimension：ASMEBl65ffor、API 6050fASMEBl647seriesA、MSSSP一44(for NPS>24)

-BW end dimension：ASME B16 25

-Socket—weld dimension：ASME B16 1 1

-Face to face and end to end：ASME B16 10

-Pressure—temperature ratings：ASME B16 34

 - Carbon steel or stainless steel + flexible graphite combined gasket is usedforClassl50 gate valve；Stainless steel + flexible graphite -wounded gasket is used for Class 300 gate valve；Stainless steel + flexible graphite wounded gasket is used for Class 600 gate valve and ring joint gasket is also optional for Class 600 gate valve；Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used

-forClassl500一Class2500 gate valve

 -Molded flexible graphite is used for packing material PTFE or combined packing material can be also used if being requested by the customer The internal surface of the stuffing box，of which area is contacted with the packing，is of excellent finish(Ra 3 2 u m)The stem surface，contacting with the packing，should be rolled and pressed after being precisely machined．so as to reach to the high finish and compactness(Ra 0 8 u m)and ensure the reliable tightness of the stem area

-The body and bonnet ofClassl50～Class 900 gate valves are usually connected

-Hand wheel or gear box is usually used for gate valve actuation Chain wheel and electric actuator can be also used for gate valve actuation if being requested by the customers

-All our gate valves have the back seating design In most oases，the carbon steel gate valve is fitted with a renewable back seat For stainless steel gate valve，the back seat is machined directly in the bonnet or is machined after welding When the gate valve is at fully open position，the sealing of the back seat can be very reliable However．as per the requirement of API 600．it is not advisable to add or change packing by the

mean of back seating when the valve is pressure containing Usually．the stem nut is made of ASTM A439 D2 It is also can be made of copper ally if being requested by the customer For large sized

-gate valves(NPS 10 for Class 150，NPS 8 for Class 300．NPS 6 for Class 600，NPS 5 for Class 900)，rolling bearing is fitted at the two sides of the stem nut in order to minimize the open and close torque of the gate valve

 -The stem is of integral forged design。 The minimum diameter of the stem shall per the standard requirement The connection of the stem and disc is T type The strength of the connecting area is bigger than that of the T threaded part of the stem The strength test of that area conforms to API 591

  

-Welded on seat is used for NPS≤12 carbon steel gate valves For Stainless steel gate valve，integral seat is usually adopted，or to weld hard alloy directly integrally Threaded or welded on seat is also optional for stainless steel gate valve if being requested by the customer

  -For carbon steel gate valve．the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS≤10 gate valves, and welded on seat can be also optional if being requested by the customer

-Besides the common gate valves，Our company。s also makes cryogenic gate valve，Jacketed Gate Valve，Bellow Sealed Gate Valve, EXtension Stem Gate Valve for underground application，etc
Our products are very competitive, feel free to contact us and offer you the fastest

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safety valve

A boiler is most undoubtedly an enclosed mechanical device that gives a means for combustion high temps to come to be transmitted into water until it receives heated water or steam. its then prepared to use as obtaining a provide of high temps for residential, commercial, and industrial hearing. once the water or other fluid is heated within a boiler, its under pressure. whenever a boiler is under pressure, measures must come to be implemented to produce good as well a good offer pressure accumulates that cause an explosion. the principal kind of equipment accustomed to halt overpressure is a protection valve or protection alleviation valve.

A protection valve or protection alleviation valve is constructed to halt as well a good offer pressure produce up within a boiler. within a boiler, once the best pressure is reached, the protection valve will kick in by releasing a selected amount of fluid together the lines of steam from within of the boiler unit. The release will substantially reduce the undesirable pressure thus stopping hazardous income together the lines of the explosion. A protection valve must be in procedure whatsoever times. These valves must be set up where ever there may be acknowledged as obtaining a hazard of as well a good offer pressure building up within a boiler. pressure undesirable is commonly produced within a amount of unique situations, including: sudden pressure surges, protection to some fire, cooling program failure, instrumentation failure, high temps exchanger tube failure, unbalanced fluid circulation rate, and fluctuations in temperature.

Safety valves are prepared to use on boilers with compressible gases, generally deliquescent ways together the lines of steam. As well, they may be prepared to use in pressure pumped ways together the lines of pressurized water tanks. Boiler categorization is in accordance to some amount of good reasons together the lines of just how a good offer its prepared to use as well as kind of program together the lines of obtaining a energy firing or energy fired system. That is, boiler sorts together the lines of essential boilers, essential oil fired boilers, gasoline fired boilers coal fired boilers, fluidized bottom boilers etc. These sorts of boilers are prepared to use in industrial energy generation. Therefore, boilers are categorized dependent at the subsequent factors: kind of energy used, firing type, kind of heating up process together the lines of steam, circulation method, and kind of construction.

The two most well-known sorts of boilers that need protection valves are steam boilers and warm water boilers. warm water boilers are commonly prepared to use industrial buildings, manufacturers, and businesses. water is heated to temps that can permit distribution with some boilers heating up the steam even hotter versus the boiling factor temperature. The steam within your boiler is prepared to use for these sorts of programs as producing energy or heating up a building. because it relates to producing steam for power, the steam is removed within your steam boiler at an really huge temps and pressure. Therefore, a protection alleviation valve is desired in circumstance of the crisis where in the pressure receives dangerously as well high.

The two important sorts of boilers that need a protection alleviation valve are energy era Boilers and Industrial Steam Generators. they may be also categorized as water Tube Boilers and Fire Tube Boilers. Fire tube boilers include: Domestic Use Boilers, Locomotive Boilers, and Industrial Boilers. Other sorts of boilers that need a protection valve include: regular circulation boiler, Forced circulation Boilers, and very essential pressure Boilers. dependent at the kind of energy used, boilers is commonly categorized as multi-fuel fired, gasoline fired boilers, coal fired boilers, essential oil fired boilers, biomass fired boilers, and industrial waste materials fired boilers. every one of these unique boilers that keep huge pressure and temps need protection valves. its very important that tumble short safe and seem mechanisms together the lines of protection valves and protection alleviation valves are set up in boilers at the identical time as other devices that keep pressure in choose to halt the pressure from accumulating to hazardous levels

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API Floating ball valve

-Structural Features: API Floating ball valve

-Float ball valves are superior products developed upon the advanced technology

home and abroad Provided with updated design ideas．they meet the requirements

on safety and convenience in general industrial standards

1 Switch Indication of Hand 0perated Float Ball Valve

    As the moving parts of valve，ball．valve stem and handle are an assembly

unit The head of valve stem is shaped a diploid thus to easily distinguish whether

valve is in the。ON。position or。0FF。position from handle position When handle

or stem diploid is in parallel with the pipe axis valve is in。0N‘position；when handle

or stem diploid is vertical to the pipe axis valve is in。OFF。position

2 Valve Locking Device

  To prevent misoperation，the fully opened or closed position of valve can be

locked up，especially when valves are mounted outdoors or when valves are not

allowed to be opened or closed by technical process To prevent misoperation by

other persons，it seems very important to have valve position locked up Thereby，

lockhole locating ab is designed if requested by users to meet the technological

requirements of users

3 Anti—flyout Structure of Valve 8tem

  When medium passes through the valve，the pressure in valve body may

possibly push the stem out，or when the valve is in repair，if there is pressure in

the middle cavity．the stem or medium seems to easily fly out upon disassembling

the valve which can cause injuries to human beings To prevent these possibilities

a dummy club Is placed at the lower part of the stem In this way．even if there is

fire，packing and the rust bearing are burnt or packing is damaged due to other

causes．the pressure of medium in valve body will make the dummy club of valve

stem in close contact with the upper seal face of valve body．Thus to prevent medium

leaking out from the damaged packing position

4 Antistatic Device

    When operating the valve，the friction between the ball and the nonmetal seat．

1ike PTFE or etc will produce electrostatic charge that can be accumulated on the

ball To prevent static spark an antistatic device is placed on the valve to derive

the electric charge accumulated on the ball from the static channel between the ball

and the stem，or between the stem and valve body

5 Fire Protection Structure

    In case of fire．the nonmetal packing or seat(non—fireproof material)will be

burnt．the considerable medium leakage may possibly cause fire spread Here，the

fire protection structure functions to prevent medium from mass leakage As shown

in the figure once the seat is burnt the ball will directly contact the metal face on

valve body thus to prevent medium leaking out from the burnt seat The design of

fire protection and antistatic structure shall conform to the requirements of APl607．

JB6899 and the second part of BS6755

6 Middle Flange Leak-tight Structure

  The connection between valve body and the left body is sealed by gasket To

prevent seal leakage resulted from fire high temperature or vibration etc the valve

body and the left body is designed metal—to—metal contacted thustofor|11 up a seal

flange to ensure leak—tightness

7 Dependable Seating Structure

  The two-way sealing structure embodying the years of our manufacturing experience in ball valves and the internationally advanced technology can release the pressure at valve seat and ensure reliable seal under high or low pressure and vacuum state When the pressure of medium is IOW the contact area between valve seat insert and ball is relatively small，thus providing high sealing load to ensure dependable seating seal When the pressure of medium Is high，the contact area between valve seat insert and ball is relatively large，so that the valve seat insert can endure the considerable medium thrust and cannot be damaged

  Regarding ball valves of very low working pressure．in consideration that the pressure of medium cannot guarantee the dependable seal of valve seat．and that the pretightening force will decrease after a long time of service，so we apply leaf spring loaded seating structure for valves working under IOW and ultralow pressure or under vacuum conditions。thus to ensure persistent and dependable seal

    The seating structure of medium and high temperature ball valves use PPL for seal ring that carl serve a temperature of 300℃Ball valves

with metal seal and high temperature resisting materials can be used to deal with even higher temperature This structure takes the function of one—way seal

8 Self-relieving Structure

    In case of abnormal rise of pressure in the middle cavity of valve resulted from the medium left there suffered from changes of pipeline pressure or medium temperature automatic pressure relief of valve seat can be effected under the pressure of the medium itself,  thus to guarantee the safety of valve

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high pressure globe valves introduction

There are many types of globe valve, and high pressure globe valve is one of them. See the specification as below:

1)Size: 2"-16"
2)Pressure rating: 150#-900#
3)Material: WCB/CF8/SS304/CF8M/SS316 etc.
4)Standards:
A)Design and manufacture: BS 1873/ASME B16.34
B)Inspection and Test: API598
C)Flange connection: ANSI B16.5
D)Face to Face: ASME B16.10

If this is not the globe valve you are interested in, you can refer other types in our website.

Learn about gate valve

If you are into valve industry, you may need to learn much knowledge for kinds of valves. Here is a detailed introduction for gate valve:

Application Specification gate valve1、Design and manafacture: API 602. BS5352. ASME B16.34
2、End connection size:
1)Socket—weld dimension: ANSI B16.11. JB/T1751
2)Screw thread dimension: ANSI Bl.20.1. JBrr7306
3)Butt-welding dimension: ANSI B16.25. JB[T12224
4)Flange end dimension: ANSI B16.5. JB79
3、Valve inspection and test: AP1598. GBf T13927. JB[T9092
4、Structure features: Bolted bonnet (B.B) and outside screw and yoke (OS&Y) or welded bonnet (W.B) and outside screw and yoke (OS&Y)
5、Material according to ANSUASTM
6、Main materiaI:A105. LF2. F5. F11. F22. 304(L). 316(L) . F347. F321. F51 etc.
Carbon Steel Pressure-temperature Ratings
CL150-285P.S.I @1000 F
CL300-740P S l @1000 F
CL600-1480P.S.I @1000 F
CL800-1975P.S.I @1000 F
CL1500-3705P.S.I @1000 F

Triple Offset Butterfly Valve--the fashion style!

Since the Triple Offset Butterfly Valve is new model, if you are curious about its structure, you can see its draw below:

note: The chart above only lists out some common composition of valve parts, We may provide other different parts material composition according to the customer's request or the actual valve working condition
Our production of Gate valve in line with international standards, we support the DIY custom valve, sell the best is: Globe valve，Y strainer，wing check valve

If you want to know more about it, you can visit this website for details: http://www.wlvalves.com/.