Shijiazhuang High & Middle Pressure Valves Manufacturer
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Vacuum relief valve DDA

Product Features

After the valve is used for vacuum pump vacuum tube road, when the vacuum degree in the piping system exceeds allowable values, automatically open the valve, balance the pressure in the piping system, vacuum pumps and protection system.

Technical parameters

Technical parameters

 

model DDA -50 DDA -80
Sealing pressure MPa Absolute pressure 62800 13600
vacuum 37200 86400
Opening pressure MPa Absolute pressure 62800 13600
vacuum 37200 86400
Back pressure MPa Absolute pressure 5500 5300
vacuum 45000 94700
Use medium The air, no corrosive gas
Suitable temperature 25ºC, + 80ºC

Main components:

 

The valve body The seat and disc spring
QT400-18 ZG20Cr13; H62 50CrVR

Vacuum relief valve DDA shape size and the connection size

 

DN Taper pipe threads R/ln Pipe thread G/ln L L1 d0 H
50 R2 Rc2 85 95 38 185
80 R3 Rc3 102 115 58 205

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