17 Non-metal valves; non-metal butterfly valves; non-metal ball valves; non-metal seat valves; non-metal pinch valves; non-metal check valves; non-metal pressure valves; non-metal shutter valves; non-metal needle valves; non-metal globe valves; non-metal mixproof valves; non-metal plug valves; non-metal membrane valves; non-metal diaphragm valves; non-metal piston valves; non-metal pressure indicator valves; non-metal pressure modulating valves; non-metal pressure monitoring valves; non-metal pressure relief valves; non-metal valves for use in pipe fittings; non-metal valves for use in conduit fittings; valves for machines and process equipment; non-metal pipes and conduits; non-metal pipe fittings; non-metal conduit fittings; non-metal pipe and conduit elbows, clamps, extensions, connectors, couplings, joints, junctions, spacers, clips, supports, rings, collars and end caps; non-metal caps for indicating pressure; non-metal end caps for indicating pressure; seals; non-metal seals and sealing rings; non-metal seals and sealing rings used to connect pipes and conduits to other surfaces; sealing devices used to connect pipes and conduits to other surfaces; non-metal sealing devices; non-metal seals for attachment to the end of a pipe; non-metallic sealing membranes; non-metallic sealing strips; non-metallic sealing profiles; seals for pipe and conduit connections; rings of metal for use as pipe and conduit connection seals; rings of rubber for use as pipe and conduit connection seals; static seals; bonded seals; composite seals; dynamic seals; seal rings, sealing boots and sealing covers for use on penetrated parts between pipes, conduits and machine bodies, walls and floors to maintain an airtight or watertight condition; non-metal junctions for pipes and conduits