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Gas reserve supporting valve series
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Gas reserve supporting valve

Hydraulic emergency shut-off valve for station QDY421F-25/40

Features

1. Applicable to gas pipelines for safety protection. When the pipeline leaks, the hand-cranked oil pump is used to relieve the pressure and remotely control the valve to close. In the event of a fire, the high temperature melts the fusible plug and the v

Technical Parameters

Technical parameters:

Nominal pressure Mpa 2.5 4.0
Shell test pressure Mpa 3.75 6.0
Sealing test pressure Mpa 2.75 4.4
Applicable temperature -40℃-+50℃
Applicable media Liquefied petroleum gas, natural gas, liquid nitrogen, etc.
Flange Standard GB/T9113-2000
Manufacturing standards JB/T9094—1999
Emergency cut-off time ≤10-30 S
Melting temperature of fusible plug 75±5℃
Cylinder applicable medium Synthetic spindle oil, transformer oil
Cylinder pressure Mpa 4.0-6.0

Main parts materials

Valve body Valve stem Valve disc spring Gasket Cylinder Sealing ring
WCB 20Cr13 ZG20Cr13 50CrVA ,1Cr18Ni9 PTFE 20# NBR

Station hydraulic emergency shut-off valve ODY421F nominal pressure PN2.5MPa dimensions and connection dimensions

DN L D Dl D2 D3 Convex D4 concave b f Z-φd H
25 160 115 85 65 57 58 16 4 4-φ14 262
32 180 140 100 76 65 66 18 4 4-φ18 245
40 200 150 110 84 75 76 18 4 4-φ18 321

Station hydraulic emergency shut-off valve ODY421F nominal pressure PN2.5MPa dimensions and connection dimensions

DN L D Dl D2 D3 Convex D4 concave b f Z-φd H
50 230 165 125 99 87 88 20 4 4-φ18 346
80 310 200 160 132 120 121 24 4 8-φ18 435
100 350 235 190 156 149 150 24 4.5 8-φ22 460
125 400 270 220 184 175 176 26 4.5 8-φ26 495

Station hydraulic emergency shut-off valve ODY421F nominal pressure PN2.5MPa dimensions and connection dimensions

DN L D Dl D2 D3 Convex D4 concave b f Z-φd H1 H2
150 444 300 250 211 203 204 28 4.5 8-φ26 590 353
200 533 360 310 274 259 260 30 4.5 12-φ26 695 410
250 622 425 370 330 312 313 32 4.5 12-φ30 735 441