Diaphragm vacuum valve uses the valve rod to press the rubber diaphragm directly on the valve seat. It is used to cut off or connect air flow. It is often installed between the pumped container and various low vacuum pumps. Its action principle is to rotate the handle to move the stem downward, press the rubber diaphragm directly on the valve seat, and cut off the air flow. Rotate the hand wheel in the opposite direction, and the valve rod moves upward to drive the rubber diaphragm away from the valve seat and connect the air flow.
The main body of the valve is made of aluminum alloy. Simple structure, light weight, small volume and good sealing performance. The diaphragm vacuum valve with NBR is used for the non corrosive gas on the low vacuum pipeline and the temperature of - 25 ~ 80 ℃. The diaphragm vacuum valve with fluororubber can be used for the high vacuum system with the temperature range of - 30 ~ 150 ℃
The existing series of diaphragm vacuum valves produced in China have nominal diameters of 10 mm, 25 mm, 40 mm and 50 mm respectively. Among them, GM type high vacuum diaphragm has five types: GM type, GMC type, gm-kf type, gm-d-h (I) and gm-d-h (II). The difference lies in the form of connecting flange of the valve.
SSR Roots Type Blowers
Dry Type Oilless Vacuum Pumps
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