China Forged Cryogenic Check Valve Factory Supplies LF2/LF3 Cryogenic Forged Steel Check Valves, API 602, 1/2IN-2IN, CL150-CL1500, Metal Seat, SW Ends. Key Specifications / Features Name: Cryogenic Check Valve. Material: LF2, LF3, F316, F304, F316L. Standard: API 602. Face to ...