Working Principle: Quick couplings are devices which permit easy, immediate connections and separation of fluids, gases of hydraulic and pneumatics lines. When installed in a system, quick coupling saves time by eliminating the necessity to close valves, bleed the system, recharge with fluid and purge entrapped air whenever an accessory is being replaced. These couplings serve virtually every industry in the control and flow of fluid power - Hydraulic / Pneumatic / Chemical / Petrochemical / Cryogenic etc.Features: Quick release couplings eliminate valves and screw on fittings in many pneumatics, hydraulic and chemical systems Permits easy, safe, quick and reliable connections between delivery lines, pressure hoses etc Connection & Disconnection of fluid system is as easy as plugging in an electric gadget MoC: Body in SS-304, SS-316, Brass, MS chrome Plated, CS Spring in MS / SS as required Ball in MS / SS as required Seals : Nitrile, Viton, Neoprene, Silicon as desired Sizes: from 1/8" upto 3"Selection of QRC: Functions or Need Pressure Requirement Type of Coupling Pipe and thread size Flow Seal End Connections Types of Couplings: Three general types of quick couplings commonly recognized are1. One way Check valve coupling (Single Check Valve) comes with one way sealing with one check valve build in to coupler only, where as plug do not have any check valve. The coupler body should be installed on the upstream (Supply) end of the line to shut off the fluid supply, when coupling is disconnected.2. Twp way Check valve coupling (Double Check Valve) These are designed for connecting hydraulic lines. It is also used extensively where a variety of other fluids are invloved. It is made to withstand a pressure from 800 to 10000PSI depending upon size and material. Contains valves in both coupler and adaptor to prevent loss of fluid when the coupling is disconnected.3. Straight Through Coupling (No Check Valve) This type has no check valve. It is ideal for maximum flow application. Since there is no check valve, fluid flow should be shut off before the coupling is disconnected.+ Read More