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Station hydraulic emergency shut-off valve QDY421F-25/40

Features

1. Suitable for gas or liquid ammonia pipelines, providing safety protection. When a pipeline leaks, use a hand-operated oil pump to relieve pressure and achieve remote control of valve closure. When a fire occurs, high temperatures cause the fusible plug

Technical Parameters


Technical Parameter


MPa 2.5 4.0
Shell Test Pressure MPa 3.75 6.0
Seal test pressure MPa 2.75 4.4
Temperature -40℃~+150℃
Applicable Medium Ammonia, liquid ammonia, vinyl chloride, refrigerants, etc
Flange standard GB/T9113-2000
manufacturer's standard JB/T9092-1999
Emergency cut-off time ≤10~30秒
Melting temperature of fusible plug 75±5℃
Applicable medium for oil cylinder Synthetic spindle oil, transformer oil
max MPa 4.0~6.0

Main component materials:

valve body valve stem Valve flap spring gasket hydro-cylinder sealing ring
WCB、LCB 20Cr13 20Cr13 20CrVA,1Cr18NI9 PTFE 20’ NBR

Station hydraulic emergency shut-off valve QDY421Fnominal pressurePN2.5MPaExternal dimensions

DN L D D1 D2 D3bulge D4bulge b f Z-φ 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
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