Apparatus, machines and component parts thereof for vacuum production, namely pumps, motors, valves, regulators, distributors, check valves, relief valves, venturi tubes, suction cups, pneumatic control circuits; compressors [machines]; pressure reducers [parts of machines]; vacuum pumps [machines]; pump diaphragms; pumps [parts of machines, engines or motors]; pressure regulators [parts of machines]; pressure valves [parts of machines]; valves [parts of machines]; apparatus and instruments f...