SRL hand valve is a manual shut-off valve designed for installation in the liquid, suction and hot gas lines of refrigeration plant. SRL-6S, 1/4'' , SRL-10S, 3/8'', SRL-12S, 1/2'', SRL-15S, 5/8'', SRL-18S, 3/4'' SRL-22S 7/8'' Features: 1.Can be used for all fluorinated refrigerants. 2. Fitted with three stainless steel diaphragms that prevent leakage through out the operating life of the valves 3.Valve plate of polyamide nylon to give complete shut-off with minimum torque 4.Valve cover with special designed to prevent the ingress-of moisture.