Cryogenic Check Valve is used in the management system of cryogenic liquid storage and transportation equipment to prevent the backflow of cryogenic medium. When the medium flows in the specified direction, the valve flap is opened by the force of the medium; when the medium flows backward, the valve flap is tightly closed with the sealing surface of the valve seat due to the weight of the valve flap and the opposing force of the medium. Closed to achieve the purpose of preventing the backflow of the medium. It has the characteristics of flexible switch and reliable sealing. Applicable Medium: Cryogenic temperature medium like Methane/Liquid natural gas/Hexene/Carbon dioxide/Liquid ammonia/Liquid oxygen/Liquid nitrogen/Liquid hydrogen and so on. Specifications 1. Valve Size : 2 ~ 36” 2. Applicable Rating : ASME 150# ~ 600# 3. Temperature : Down to -196 ℃ 4. Code & Standard : BS, ASME, ASTM Designed by BS6364, ASME B16.34, and ASME B16.25/16.5 5. Shell & Seat Leak Test : API 598 & BS6364 6. Constructions： End Connection : Flanged, Butt-Welded or RTJ Type Full Bore /Reduce Bore Design Feature FEATURE: 1.Low fluid resistance. 2.Can be installed horizontally and vertically. 3.Cryogenic temperature liquid nitrogen pretreatment of parts. 4.Bolted bonnet, welded bonnet, pressure self-tightening bonnet. Technical Property MATERIALS FOR MAIN PARTS:

PARTS NAME	MATERIAL
BODY	Cast Steel – ASTM A351-CF8(M)/CF3(M)
BONNET	Cast Steel – ASTM A351-CF8(M)/CF3(M)
SEAT	SOFT: PCTFE METAL: ASTM A276-304(L) / 316(L)-(H.F)
DISK	ASTM A351-CF8(M) / CF3(M), A276-304(L) / 316(L)-(H.F)
GASKET	SPIRAL WOUND GRAPHITE