6 metal valves not being parts of machines, namely, air valves, angle valves, automatic valves, balanced valves, ball check valves, blow off valves, boiler valves, bonnet valves, bronze valves, butterfly valves, by-pass valves, cast steel valves, check valves, composition disc valves, gate valves, gear operated valves, globe valves, iron valves, lever operated valves, marine service valves, monel metal valves, needle valves, non-return valves, regrinding valves, screw down type valves, steel valves, stop check valves, spring acting valves, swing check valves, union valves, y valves; metal valve parts not being parts of machines, namely, valve bodies, bolts, bolt pins, valve bonnets, bonnet seal rings, valve bonnet yokes, bumper plugs, caps, cap screws, disk carriers, disc holders, disc spreaders, disc lock nuts, disc valve elements, valve glands, guide collars, hinge pins, levers, links, lock nut keys, packing nuts, packing rings, plugs, seat rings, side plugs, stems, stuffing box studs, thrust plates, metal washers, yokes, yoke arms, yoke stem bushings; and valve fittings, namely, bushings, caps, chain guides, couplings, cross fittings, elbows, flanges, hand wheels, lock nuts, nipples, plugs, reduction fittings, return bends, sprocket wheels, swing joints, swivel couplings, t-valves, templates, unions and y fittings