Application scope and standard specifications of welding safety valves

Application scope and standard specifications of welding safety valves

Welding safety valve introduction:
A61Y spring micro-opening safety valve is suitable for equipment and pipelines of air, ammonia, petroleum gas and other media with working temperature ≤200°C. A61Y-160P safety valve, A61Y-320P safety valve is suitable for temperature ≤200°C Corrosive gas or liquid equipment and piping as an overpressure protection device.

Welding safety valve application range:
A61Y spring micro-opening safety valve is suitable for equipment and pipelines of air, ammonia, petroleum gas and other media with working temperature ≤200°C. A61Y-160P safety valve, A61Y-320P safety valve is suitable for temperature ≤200°C Corrosive gas or liquid equipment and piping

Standard Specification for Welding Safety Valves :
Design and manufacturing standards: GB/T 12243-2005
Structure length standard: GB/T 12221-2005
Connection flange standard: GB/T 9113
Pressure temperature grade: GB/T 12224-2005
Test inspection standard: GB/T 13927-2008

Welding safety valve parts materials and working conditions:

NO.
Part Name
A61H-C A61Y-C material
A61Y-P material
1
Connector
20
1Cr18Ni9Ti
2
Joint nut
35
1Cr18Ni9Ti
3
Seat
2Cr13
1Cr18Ni9Ti
4
Valve body
35/35CrMoA
1Cr18Ni9Ti
5
Valve flap
2Cr13
1Cr18Ni9Ti
6
Guide sleeve
2Cr13
1Cr18Ni9Ti
7
spring
50CrVA
50CrVA coated fluoroplastic
8
Valve stem
2Cr13
2Cr13
9
cap
ZG230-450
1Cr18Ni9Ti
10
Adjustment screw
45
2Cr13
11
Bonnet
ZG200-400
1Cr18Ni9Ti
12
Sealing surface material
Y-type surfacing Co-based cemented carbide, H-type surfacing D507

Main dimensions and weight of welded safety valve :

Nominal pressure
Nominal diameter
size
Do
D
D1
D2
L
L1
H
16
10
6
17
14
12
115
135
78
15
8
twenty two
18
16
115
135
85
20
10
28
twenty two
20
115
135
135
25
12
35
26
twenty four
160
165
142
32
10
6
twenty two
14
12
115
135
80
15
8
25
17
15
115
135
90
20
10
30
twenty two
20
115
135
140
25
12
38
26
twenty four
160
165
148

  Welding safety valve installation instructions:
1. All A61Y stainless steel safety valves should be installed vertically.
2. There should be no resistance at the exit of A61Y stainless steel safety valve to avoid pressure.
3, A61Y stainless steel safety valve should be specially tested before installation, and check its official seal.
4. The A61Y stainless steel safety valve in use should be inspected regularly.

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