What is that black cylindrical component in the metering pump head? How to operate it? Thank you all
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How does this work? Does it need to be refueled? Thank you all; the more detailed, the better
A safety valve, a return oil valve
This is the typical three-valve integrated design of diaphragm metering pumps; it combines an oil filling valve, an exhaust valve, and a safety valve. The proper operation of the metering pump depends entirely on these valves, and generally, transformer oil needs to be added