Cast iron low lift safety valve is widely used in petroleum, gas, electricity, chemical industry, etc. It is applicable for water, steam, gas, oil or corrosive medium. The valve is made of cast iron and the working temperature is less than200℃. When the pressure in pipes is higher than permitted pressure, safe valve will open to release pressure to ensure the safety of pipes. When the pressure in pipes is lower than allowed pressure, safety valve will close and the pressure inside pipes will be increased.
Materials
Part Name
Materials
Body/bonnet
Ht200
Stem
2Cr13
Disc
Brass
Base
Brass
Spring
50CrVA
Parameters
Nominal Pressure PN(MPa)
Seal(MPa)
Intensity(MPa)
Working Pressure(MPa)
Working Temperature(℃)
Applicable Medium
1.0
1.0
1.5
10, 20, 30, 40, 50
≤200
Water, steam, oil
Dimensions
DN
Taper Thread(R)
L1
L
H
S
D0
Pipe Thread(G)
15
1/2
52
35
175
30
16
1/2
20
3/4
55
37
185
34
20
3/4
25
1
67
42
221
40
25
1
32
11/4
79
45
147
48
31
11/4
40
11/2
84
55
270
56
37
11/2
50
2
101
67
305
66
48
2
65
21/2
110
75
345
74.5
52
21/2
80
3
120
80
330
89
60
3
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