Conrader GV-Series check valves are used in compressed gas and pneumatic systems. These valves open to allow flow in one direction and close when the flow stops or reverses. The GV-Series are used in-line, have female connections, and are serviceable without removing the valve from the line. Max Operating Pressure: 250 psi Operating Temperature Range: -65° to 450°F Flow Capacities: 60SCFM @100 psig Connection Size: 3/4" npt Connection Type: Female NPT Construction Material: Brass Seal: Reinforced PTFE