11 parts for refrigeration systems, namely, mechanical pump recirculators, gas pressure recirculators, hand expansion valves, float valves, pilot operated valves, check valves, drain valves, globe valves, pressure reducing valves, relief valves, flow control valves, liquid level control valves, three-way valves, and level controls; control systems, comprised of above mentioned valves, pressure vessels and liquid overfeed refrigeration pumps; refrigeration equipment and supplies, namely, sight glasses, liquid injectors, pressure vessels, receivers, and accumulators, all of the above being for industrial use