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VALVES-NAMELY, BLEEDER VALVES; TESTING VALVES FOR REFRIGERATION OF A CLOSED VALVE TYPE ADAPTED WHEN OPENED FOR USE IN PLACING A SOURCE OF FLUID PRESSURE IN COMMUNICATION WITH A GAUGING DEVICE; TANK VALVES; CYLINDER VALVES; PRESSURE REGULATING AND REDUCING VALVES; CHECK VALVES; FILLER VALVES; EXCESS FLOW CHECK VALVES; RELIEF VALVES; MANUAL AND AUTOMATIC VALVES OF A GENERAL VALVE TYPE SUCH AS SHUT OFF VALVES, METERING VALVES AND CHECK VALVES WHICH ARE EITHER OPERATED OR PRESET MANUALLY OR OPERATE AUTOMATICALLY IN RESPONSE TO A CHANGE IN THE FLOW OF THE FLUID OR PRESSURE WITHIN THE SYSTEM; AND COCKS-NAMELY, DRAIN COCKS; SHUT-OFF COCKS; DRAIN SHUT-OFF COCKS; THREE-WAY SHUT-OFF COCKS; CHOKE CONTROLS OF THE BOWDEN WIRE CONTROL TYPE HAVING A FLEXIBLE HOLLOW CONDUIT CONTAINING AN INNER MEMBER CAPABLE OF AXIAL OR ROTARY MOVEMENT INSIDE THE CONDUIT USED AS A FORCE TRANSMITTER; AND HANDLES FOR THE VALVES AND COCKS AS SET FORTH ABOVE, CONNECTING UNIONS AND NIPPLES FOR PIPES AND TUBES AND METAL TUBING, METAL COUPLINGS AND METAL FITTINGS THEREFOR