Applications:
　　electro-vacuum difference pressure valve is a safety valve for mechanical vacuum pump. It is mounted at the intake nozzle of mechanical vacuum pump, synchronously opened and closed with the pump. In case that pump stops working or power supply is suddenly broken off, valve disc will be closed automatically under atmospheric pressure, to keep the vacuum system vacuum and the air charged into pump cavity, thus to prevent pump oil from reverse flow that can pollute the vacuum system. Applicable medium can be pure air or noncorrosive gases.
Technical Data:
Fluid：gas、water、stream、acid liquid more
Leak rate：≤1.0×10^-5Pa·L/S
Operating pressure：1.0×10⁵Pa～1.0×10^-5Pa
Working temp.：-30~+120℃
Materials: DN16-DN50 aluminium alloy；DN63-DN160 SS304
Sealing element:：VITON
PipeConnection ：KF、Loose Flange
Electrical data:
Voltage: AC220V、DC24V
Open or close Time：≤3s
Electrical connection: Connecting box type (popular type),
electric cable lead wire type (explosion-proof)
Protection class: German standard DIN43650A(IP65/IP67)
Other functions: E explosion-proof (explosion-proof rank Ex I/IIT4)
Figure Structure：