Gold Member Since 2013
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Hebei Xukang Meter Manufacturing Co., Ltd.

Pressure Relief Valve, Relief Valve, Safety Valve manufacturer / supplier in China, offering Pressure Reducing Valve for Steam, Magnetic Floater Bi-Color Water Level Meter Controller-Tank Level Gauge with Switches, Float & Board Tank Gauge-Magnetic Level Gauge and so on.

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Supplier Homepage Product Safety valve pressure safety valve Pressure Reducing Valve for Steam

Pressure Reducing Valve for Steam

FOB Price: US $26 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $26/ Piece
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Port: Tianjin, China
Production Capacity: 1000PCS/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: A21
  • Temperature: High Temperature
  • Pressure: Non-Ajustable
  • Structure: Spring
  • Process Temperature: Less Than 350ºC
  • Operation: Automatic
  • Pressure Rating: 1.6MPa to 32MPa; 150lb~2500lb
  • Transport Package: Carton or Wooden Case
  • Origin: Tianjin, China
  • Certification: ISO, CE
  • Connection: Flange or Thread
  • Closed: Closed
  • Material: Stainless Steel, Brass, Cast Iron
  • Port Size: 1/4 to 12′′
  • Ends: DIN Flange; G Thread; NPT, Bsp; R.F/S.W
  • Trademark: U-ideal
  • Specification: measuring medium: gas, oil, water, steam
  • HS Code: 8481804090
Product Description
  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)
Inlet flange pressure grade1.
Outlet flange pressure grade1.
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)
Shell-test pressure
Seal test pressure
Displace pressure
Relieving pressure
Pp (MPa)
Lift height
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

A21- 25
A21- 64
A21- 160
6. Main parts material
Parts nameA21H-C/A21F
KA21Y-C    material
KA21Y-P    material
A21Y-R    material
coupling nut352Cr131Cr18Ni9Ti
Spring seat2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
spring50CrVA50CrVAfluorine50CrVA fluorine
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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