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Vacuum relief valve DDA

Features

This valve is used on the vacuum pipeline after the vacuum pump. When the vacuum degree in the pipeline system exceeds the allowable value, the valve automatically opens to balance the pressure in the pipeline system and protect the vacuum pump and system

Technical Parameters


Technical Parameter


model DDA -50  DDA -80
sealing pressure MPa absolute pressure 62800 13600
vacuum degree 37200 86400
Opening Pressure MPa absolute pressure 62800 13600
vacuum degree 37200 86400
reseating pressure MPa absolute pressure 5500 5300
vacuum degree 45000 94700
Using media Air, non corrosive gas
Temperature -25℃--+80℃

Main component materials:

valve body Valve seat, valve disc spring
QT400-18 ZG20Cr13; H62 50CrVR

vacuum relief valveDDA  External dimensions and connection dimensions

DN NPTR/ln pipe threadG/ln L L1 d0 H
50 R2 Rc2 85 95 38 185
80 R3 Rc3 102 115 58 205