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“PIONEER” produce various of high performance vacuum valves, especially in vacuum angle valve, vacuum ball valve, vacuum butterfly valve, vacuum charge valve, electromagnetic vacuum valve, vacuum baffle valve, vacuum gate valve, vacuum metering valve etc". The valves are driven approach: manual, pneumatic, electromagnetic, electric motorized. Each product goes through rigorous test and helium mass spectrometer leak detector test. Used in the field of vacuum technology, like machinery, electronics, metallurgy, refrigeration, medicine, food, energy, environmental protection, scientific research and etc.