Steam Pressure Reducing Valve

Steam Pressure Reducing Valve

steam pressure reducing valve Pressure reducing valve/safety valve 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...

Product Details

steam pressure reducing valve



 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, Pk≤0.4, 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 Pk≥0.3, it's 90%Pk
Pk≤0.2, it's ≤  0.03
Pk >0.2, it's ≤ 0.15Pk
1.1Pkfull lift1/4do
low lift1/20do
Water or other liquidPk≤0.3, 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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XIAMEN KEMUS VALVE CO.,LTD.

Website : https://www.kemus-valve.com
Elaine Zheng
(Sales Director)
Email: sales1@kemus-valve.com
Tell: +86 0592 7103069
Phone: +86 18359108305
WhatsApp: +86 18359108305
Skype: Homealine93

Wechat:  +86 18359108305

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