Profile: V. H. T. Engineering is a manufacturer of air intake valves, pressure valves, blow down valves and reciprocating compressor valves. Our air intake valves are installed at the compressor inlet, which controls compressor capacity. At start up the air intake valves & check valves stay open on a control signal is applied to close the valve and restrict the flow. We are supplying air intake valve, check valve, compressor intake valve and screw compressor control valves. Oil stop valve is designed for oil injected screw compressors and rotary screw air compressors. The pilot port must be connected to compressor discharge upstream from the minimum pressure valve and preferably to the wet side of the oil separator. The inlet port must be connected to downstream side of a oil cooler & thermal valve, to provide PSI pressure difference between the pilot and the inlet. Return line sight glass is used to suck the oil stored in the separator and pass in through the return line of sight glass. Oil level indicators control the temperature in hydraulic systems. Blow down valves are used to relief pressure from the separator of compressor, when it is switched off.