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VA SERIES SAFETY VALVES
VA SERIES SAFETY VALVES2

VA500 SERIES ANSI STANDARD SAFETY VALVE

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VA500 SERIES ANSI STANDARD SAFETY VALVE

  • 2026 年 6 月 24 日

Description

Set pressure deviation ≤±3%
Exceeding pressure ≤10%
Opening and closing pressure difference ≤15%
Sealing performance Compliant with API 527

 

va500

va500 2

  • The valve seat and valve body are detachable,facilitating maintenance and being economical.
  • The umbrella-shaped counter-pressure disc can effectively enhance the lift force. The valve disc can be quickly opened under a small overpressure, thereby achieving the purpose of protecting the equipment.
  • The adjusting ring can adjust the opening and closing differential pressure.
  • The appropriate selection of the clearance between the counter- pressure disc, the guide sleeve and the valve stem ensures the flexible movement of the valve opening and closing.
  • The sealing surfaces of the valve disc and the valve seat are welded with hard alloy, and after surface fine grinding, they ensure high sealing performance and long service life.
  • The wave-shaped tube in the balanced wave-shaped tube safety valve can eliminate the influence of back pressure fluctuations on the valve performance and also protect the spring and other internal components from corrosion by the medium.
  • The selection of the material and processing technology of the spring and the wave tube are meticulous, and strict tests and inspections are carried out.

Throat Dia.D Specification&Dimension

d₀=14mm
154mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
1D2 150 150 1.96 1.58 114 105 30 440
1D2 300 150 1.96 1.58 114 105 30 440
1D2 300 150 1.96 1.58 114 105 30 440
1D2 600 150 1.96 1.58 114 105 30 440
Throat Dia.E Specification&Dimension
d₀=14mm
154mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
1E2 150 150 1.96 1.58 114 105 30 440
1E2 300 150 1.96 1.58 114 105 30 440
1E2 300 150 1.96 1.58 114 105 30 440
1E2 600 150 1.96 1.58 114 105 30 440

 

Throat Dia.F Specification&Dimension
d₀=18mm
254mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
11/2F2 150 150 1.96 1.58 121 124 32 536
11/2F2 300 150 1.96 1.58 121 124 32 536
11/2F2 300 150 1.96 1.58 152 124 35 536
11/2F2 600 150 1.96 1.58 152 124 35 536
Throat Dia.G Specification&Dimension
d₀=22.5mm
398mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
11/2G3 150 150 1.96 1.58 121 124 32 536
11/2G3 300 150 1.96 1.58 121 124 32 536
11/2G3 300 150 1.96 1.58 152 124 35 536
11/2G3 600 150 1.96 1.58 152 124 35 536
Throat Dia.H Specification&Dimension
d₀=28.3mm
629mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
11/2H3 150 150 1.96 1.58 124 130 38 542
11/2H3 300 150 1.96 1.58 124 130 38 542
2H3 300 150 1.96 1.58 124 130 43 666
2H3 600 150 1.96 1.58 162 154 56 691
Throat Dia.J Specification&Dimension
d₀=36mm
1018mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
2J3 150 150 1.96 1.58 124 137 49 673
2J3 300 150 1.96 1.58 124 137 49 673
2J3 300 150 1.96 1.58 181 184 49 786
2J3 600 150 1.96 1.58 181 184 49 786
Throat Dia.K Specification&Dimension
d₀=43mm
1452mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
3K4 150 150 1.96 1.03 162 156 49 758
3K4 300 150 1.96 1.03 162 156 49 758
3K4 300 150 1.96 1.03 162 156 49 758
3K4 600 150 1.96 1.38 181 184 49 786
Throat Dia.L Specification&Dimension
d₀=53.5mm
2248mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
3L4 150 150 1.96 0.69 165 156 49 758
3L4 300 150 1.96 0.69 165 156 49 758
4L6 300 150 1.96 1.17 181 179 49 853
4L6 600 150 1.96 1.17 203 179 57 853

Throat Dia.M Specification&Dimension

d₀=60.3mm
2856mm²		 Set Press Pk(MPa) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
4M6 150 150 1.96 0.55 184 178 48 852
4M6 300 150 1.96 0.55 184 178 48 852
4M6 300 150 1.96 1.10 184 178 48 852
4M6 600 150 1.96 1.10 203 178 56 852
Throat Dia.N Specification&Dimension
d₀=66mm
3421mm²		 Set Press Pk(MPa) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
4N6 150 150 1.96 0.55 210 197 48 871
4N6 300 150 1.96 0.55 210 197 48 871
4N6 300 150 1.96 1.10 210 197 48 871
4N6 600 150 1.96 1.10 222 197 72 871
Throat Dia.P Specification&Dimension
d₀=80mm
5027mm²		 Set Press Pk(MPa) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
4P6 150 150 1.96 0.55 229 181 48 855
4P6 300 150 1.96 0.55 229 181 48 855
4P6 300 150 1.96 1.03 254 225 62 1079
4P6 600 150 1.96 1.03 254 225 62 1079
Throat Dia.Q Specification&Dimension
d₀=105.5mm
8742mm²		 Set Press Pk(MPa) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
6Q8 150 150 0.79 0.48 241 240 68 855
6Q8 300 150 0.79 0.48 241 240 68 1120
6Q8 300 150 0.79 0.79 241 240 68 1120
6Q8 600 150 0.79 0.79 241 240 68 1120
Throat Dia.R Specification&Dimension
d₀=126mm
12568mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
6R8 150 150 0.41 0.41 241 240 68 1120
6R8 300 150 0.41 0.41 241 240 68 1120
6R10 300 150 0.69 0.69 267 240 68 1426
6R10 600 150 0.69 0.69 267 240 68 1426
Throat Dia.T Specification&Dimension
d₀=161.5mm
20485mm²		 Flange Rating(Lb) 38°C Max. Back Press(Mpa) Dimension(mm)
Inlet Outlet Normal Type Bellows Type L L1 X (VA500)H≈
8T10 150 150 0.20 0.20 279 276 62 1462
8T10 300 150 0.20 0.20 279 276 62 1462
8T10 300 150 0.41 0.41 279 276 62 1462
8T10 600 150 0.69 0.69 279 276 62 1462

 

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