INVALCO

manually operated metal valves and valve parts for repair and replacement thereof, namely, vessel dump control valves, high pressure dump control valves, non-freeze dump control valves, flanged dump control valves, head pressure control valves, fuel control valves, pneumatic control valves, diaphragm operated valves, double port dump control valves, steel bodied valves, back pressure valves, relief valves, level operated valves, gas scrubber valves, [ valve actuators, ] valve controllers, and valve trim sets consisting of a stem, seat and plug all sold as a unit

automatic valves and valve parts for repair and replacement thereof, namely, diaphragm operated valves, steel bodied valves, back pressure valves, relief valves, level operated valves, gas scrubber valves, [ valve actuators, ] valve controllers, and valve trim sets consisting of a stem, seat and plug all sold as a unit; turbine meters for water, production fluids, process fluids, and consumable fluids, [ positive displacement meters for water, production fluids, process fluids, consumable fluids, and high viscosity fluids, paddlewheel meters for water, production fluids, process fluids, and consumable fluids, ] totalizers in the nature of a readout device wherein the output is in the form of an electric pulse and the device displays the amount of fluid flow, [ flow computers, electronic transmitters, ] frequency to currency converters, [ frequency to voltage converters, electronic batch controllers for batch processing, ] electronic analytical instruments for calculating flow and controlling processes, namely, oil and water monitors and associated probes, pneumatic level controls, electronic level controls, diaphragm controls, displacer controls, liquid level controllers, pressure switches, pulse scalers for electronic scaling and interface measurement systems, consisting of an electronic level control all sold as a unit