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    Hebei, China
    Business Type:
    Manufacturer/Factory, Trading Company
    Management System Certification:
    ISO 9001, QC 080000, BSCI, QHSE, HACCP, ANSI/ESD
    Main Markets:
    North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, ...
    OEM/ODM Service
    Sample Available

    Pressure Relief Valve, Relief Valve, Safety Valve manufacturer / supplier in China, offering Pressure Reducing Valve for Steam, Stainless Steel Float Ball for Floating Water Level Switch, Full Port Forged Steel Gate Valves and so on.

    Gold Member Since 2013
    Audited Supplier

    Pressure Reducing Valve for Steam

    Min. Order / Reference FOB Price
    1 Piece US $26/ Piece
    Port: Tianjin, China
    Production Capacity: 1000PCS/Month
    Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram
    Certification: ISO, CE
    Temperature: High Temperature
    Connection: Flange or Thread
    Pressure: Non-Ajustable
    Closed: Closed
    Structure: Spring

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    Basic Info.

    Model NO.
    A21
    Material
    Stainless Steel, Brass, Cast Iron
    Process Temperature
    Less Than 350ºC
    Port Size
    1/4 to 12′′
    Operation
    Automatic
    Ends
    DIN Flange; G Thread; NPT, Bsp; R.F/S.W
    Pressure Rating
    1.6MPa to 32MPa; 150lb~2500lb
    Trademark
    U-ideal
    Transport Package
    Carton or Wooden Case
    Specification
    measuring medium: gas, oil, water, steam
    Origin
    Tianjin, China
    HS Code
    8481804090
      Pressure reducing valve/safety valve
    1. Application
         A21H is applicable to equipment or piping for air, ammonia,oil gas and other medium with operating temperature less than 200 ºC. A21W is applicable to equipment or piping for corrosive gas or liquid and other medium with operating temperature less than 200 ºC. 1Fis applicable to equipment or piping for LPG,oil gas and other medium with operating temperature less than 200 ºC as over pressure protection. When Pressure exceeds the allowable value, the valve automatically open, and then the full amount is released; when the pressure reduced to the specified value, the valve automatically shut down to ensure the safe operation of equipment.

       2. Set pressure grouping
    PN( nominal pressure) Set Pressure grade
    1.60.06-0.1   0.1-0.16 0.16-0.25  0.25-0.4  0.4-0.6  0.6-0.8  0.8-1.0 1.0-1.3  1.3-1.6
    2.5> 1.3-1.6    > 1.6-2.0   > 2.0-2.5
    4.0> 1.3- 1.6    > 1.6- 2.0   > 2.0- 2.5   > 2.5-3.2 > 3.2- 4.0
    6.4> 2.5- 3.2    > 3.2- 4.0   > 4.0- 5.0   > 5.0-6.4
    10.0> 4.0- 5.0   > 5.0- 6.4   > 6.4- 8.0   > 8.0-10
    16.0> 10-13    > 13-16
    32.0> 16-19     > 19-22    > 22-25   > 25-29 > 29-32
     
    3. Inlet and outlet flange size
    PN refer to Table 5; inlet and outlet DN refer to Table 6 ( MPa)
    Table 5
    PN( nominal pressure)1.62.54.06.410.016.032.0
    Inlet flange pressure grade1.62.54.06.410.016.032.0
    Outlet flange pressure grade1.61.61.64.04.04.0/16.016.0
    Table6
    Safety valve's Open Type 
    Low lift
    Full lift
    Inlet DN the same as DN
    Outlet DNthe same as DNLarger than DN by one degree or more

     4. Performance specification(as per GB12243-2005)
     
    Medium
    Shell-test pressure
    Ps(MPa)
    Seal test pressure
    PM(MPa)
    Displace pressure
     △P(MPa)
    Relieving pressure
    Pp (MPa)
    Lift height
    H(mm)
    steam1.5PN
     
     
     
     
                   
    90% Pk or the minimum return pressure, Pk0.4, it's 0.04
    Pk >0.4, it's 0.1Pk
     
    1.03Pkfull lift1/4do
     
    low lift1/20 do
    Air or other gasWhen Pk<0.3, it's Pk-0.03;
    When Pk0.3, it's 90%Pk
    Pk0.2, it's ≤  0.03
    Pk >0.2, it's 0.15Pk
    1.1Pkfull lift1/4do
    low lift1/20do
    Water or other liquidPk0.3, it's ≤  0.06
    Pk >0.3, it's 0.2Pk
    1.2Pkfull lift1/4do
    low lift1/20do
    Note: Pk is set pressure, do is orifice diameter.
    5. Main dimension( mm)
    Pressure Reducing Valve for Steam

     
    Type(DN)dodDoGD1Lh1hMH
         16
    A21- 25
        40
    151013201/2''30365782M27*1.566
    201418253/4''35416090M33*1.568
    251723311''425270105M39*1.5105
    A21- 64
        100
    151015251''425270105M39*1.5105
    201015251''425270105M39*1.5105
    251215251''425270105M39*1.5105
    A21- 160
        320
    1581020M33*2465270105M30*2105
    2081525M33*2465270105M30*2105
    2581828M33*2465270105M30*2105
     
    6. Main parts material
    Parts nameA21H-C/A21F
    KA21Y-C    material
    A21W-P/A21F-P  
    KA21Y-P    material
    A21Y-R    material
    coupling201Cr18Ni9Ti1Cr18Ni12Mo2Ti
    coupling nut352Cr131Cr18Ni9Ti
    seat351Cr18Ni9Ti1Cr18Ni12Mo2Ti
    body2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
    disc2Cr13/2Cr13+PTFE1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE1Cr18Ni12Mo2Ti
    Spring seat2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
    spring50CrVA50CrVAfluorine50CrVA fluorine
    Locknut0235-A2Cr131Cr18Ni9Ti
    Spring guide pad2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
    Adjusting nut0235-A2Cr131Cr18Ni12Mo2Ti
    Seal surface material
     
    Y type  surfacing Co-based hard alloyW type surfacing D 507 F type PTFE


     

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