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Metal Seated Piston Lift Check Valve Cast Steel Stellite Double Flanged Non Return Valve

Categories Swing Check Valve
Brand Name: GOLD TOP
Certification: API 6D
Place of Origin: 中国
MOQ: 1pcs
Price: Negotiation
Supply Ability: 100+pcs+30days
Delivery Time: 30days
Packaging Details: Plywood Case
Material: Carbon / Stainless / Alloy / Duplex Steel
Size: 2"~36"
End Connection: FF / RF/ RTJ / BW
Pressure: 150# ~1500 #
Testing Standard: API598
Application: Water , Oil, Gas, Etc.,
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    Metal Seated Piston Lift Check Valve Cast Steel Stellite Double Flanged Non Return Valve

    Metal Seated Piston Lift Check Valve Cast Steel Stellite Double Flanged Non Return Valve
    Piston Lift Check Valve
    Introduction
    • A piston check valves are similar to lift check valves. the only difference is that piston check valves has a dashpot consisting of piston and cylinder that provides cushioning effect during operations.
    • The dashpot produces a damping effect during operation, thereby eliminating the damage caused by the frequent operation of the valve.
    • The flow of fluid through piston check valve is similar as lift check valve.
    • The construction of seat and disc for the piston check valve also same with the construction of lift check valve where the arrangement of seating is similar to a globe valve.
    • Piston check valves do not require an operation. The closing of the disc depends on the back flow and gravity whereas; the opening of the disc depends on the upward flow.
    • Piston check valve can be found in 1” to 12” size range with 150# to 900# class range.
    Operation
    • Flow to piston check valves must always enter below the seat.
    • As the flow enters, the disc is raised within guides from the seat by the pressure of the upward flow.
    • When the flow stops or reverses, the disc is forced onto the seat of the valve by both the backflow and gravity.
    Application
    • Piston check valves are used primarily in conjunction with globe and angle valves in piping systems experiencing very frequent changes in flow direction.
    • Piston Check Valves are particularly suitable for high-pressure service where velocity of flow is high.
    One Type
    Cass 900~2500 Pressure Seal Piston Check Valve
    ressure-seal Piston Check Valve 90Lb~2500Lb
    Standard Material Specifications
    NO.
    Part Name
    CS to ASTM
    AS to ASTM
    SS to ASTM
    Type A105
    Type F22
    Type F304(L)
    Type F316(L)
    1
    Body
    A105
    A182 F22
    A182 F304(L)
    A182 F316(L)
    2
    Life Disc
    A276 420
    A276 304
    A276 304(L)
    A276 316(L)
    3
    Sealing Seat
    A105
    F22
    A182 F304(L)
    F316(L)
    4
    Pressure Ring
    08F
    08F
    A276 304L
    A276 316L
    5
    Retaining Nut
    A194 2H
    A194 4
    A194 8
    A194 8M
    6
    P.S.Lock Nut
    A194 2H
    A194 4
    A194 8
    A194 8M
    Suitable Medium
    W.O.G.etc
    W.O.G.etc
    HNO3,CH3OOH etc
    Suitable Temperature
    -29 425
    -29 550
    -29 180
    Note: Other materials are available upon request.
    Dimensions (mm) and Weights (Kg)
    NPS
    1/2~
    3/4~
    1~
    1-1/4~
    1-1/2~
    2~
    L
    900~1500Lb
    140
    140
    140
    178
    178
    216
    250Lb
    186
    186
    186
    232
    232
    279
    H
    117
    117
    117
    152
    152
    195
    Weights
    900~1500Lb
    7.5
    7.0
    6.8
    18.5
    18.1
    20.3
    2500Lb
    9.0
    7.6
    8.4
    19.5
    20.1
    21.8
    China Metal Seated Piston Lift Check Valve Cast Steel Stellite Double Flanged Non Return Valve factory
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