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ZJ Series Roots Vacuum Pump
This series of Roots-type vacuum pumps cannot be used alone. It needs to be used in series with the pre-stage vacuum pump to increase the pumping rate of the pre-stage vacuum pump when the pressure is lower than 1.3×103~1.3×10-1 Pa. The structure is composed of two 8-sha...Read more -
Common connection forms of vacuum valve
1. Flange connection This is the most commonly used form of connection in valves. According to the shape of the joint surface, it can be divided into the following categories: ● Smooth type: it is used for the valve with low pressure and convenient to process. ● Concave convex type: the working p...Read more