7 Machine parts, namely, valve housings, valve yokes in the nature of straps embracing slide valves and connecting them to the valve stems, clamping rings, clamping ring joints, bayonet locks, butterfly valve housings, butterfly valve flaps, flanges, flange connections in the nature of bolts; valves being parts of machines, namely, automatically controlled, primarily by means of spring-air actuators, or manually controlled single-seated, double-seated and regulating valves, butterfly valves, valves for gaseous, liquid and for pumpable fluids, valves for the food and beverage industry and for the pharmaceuticals, chemicals and food industries, valves for connecting and/or shutting of tanks, containers and machines, ball valves; fittings, namely, connection fittings specially adapted to use with machines, namely, flanges, metal pipes with welding ends, screws, clamps, clamping ring joints; valves being parts of machines, namely, double-seated valves, single-seated valves, changeover valves, tank bottom valves, tank shutoff valves, sterile valves, pressure relief valves, safety valves, control valves, sampling valves; pumps, namely, centrifugal pumps, rotary lobe pumps, and rotary pumps, excluding water pumps for use in swimming pools, spas and bathtubs, and all of the foregoing pumps for use in processing dairy, food, beverage, brewing, cosmetics, fine chemical, and pharmaceutical products ; machine parts, namely, pressure valves, pressure-reducing valves, power-operated valves, hydraulic valve actuators, pneumatic valve actuators; machine parts, namely, expansion compensators, in the nature of metal expansion joints for the aforementioned valves; cleaners in the nature of automatic nozzles which are parts of power-operated sprayers being parts of machines, namely, orbital cleaners, rotating cleaners, and static cleaners, excluding hand-operated nozzles; aerators; milk filtering machines; filtering machines for chemical processing