Check Valves 131 CH SeriesCH Valves Check ® CH Series Check Valves for Instrumentation Tylok Check Valves are poppet-style valves made of 316 Stainless Steel, and feature a compact design that is perfect for instrumentation systems. These directional valves are normally closed, but open when the differential pressure between the inlet and outlet exceed the spring pressures. Features: • 6000 psig (413 bar) maximum pressure rating • -10°F (-23°C) to 400°F (204°C) temperature rating • 1/3 to 10 psig cracking pressure • Fluorocarbon FKM Seals • End Connections - Integral Tube Fittings (both twin [CBC-Lok®] & Single [CS-Lok®] ferrule designs) • Available in sizes 1/4”, 3/8”, 1/2”, 3/4” and 1" Pressure - Temperature Ratings (based on fluorocarbon FKM seals) Temperature °F (°C) Working Pressure psig (bar) s -10°F (-23°C) to 100°F (37°C) 6000 psig (413 bar) 200°F (93°C) 5160 psig (355 bar) Check Valve 250°F (121°C) 4910 psig (338 bar) 300°F (148°C) 4660 psig (321 bar) 375°F (190°C) 4280 psig (295 bar) Cracking and Reseal Pressures Nominal Cracking Pressure psig (bar) Cracking Pressure Range psig (bar) Reseal Pressure Range psig (bar) 1/3 psig (0.02 bar) 1/3 to 3 psig (0.02 to 0.20 bar) Up to 6 psig (0.41 bar) differential pressure 1 psig (0.06 bar) 1 to 4 psig (0.06 to 0.27 bar) Up to 6 psig (0.41 bar) differential pressure 5 psig (0.34 bar) 3 to 9 psig (0.20 to 0.62 bar) Up to 2 psig (0.14 bar) differential pressure 10 psig (0.68 bar) 7 to 15 psig (0.48 to 1.00 bar) Up to 3 psig (0.20 bar) differential pressure 25 psig (1.07 bar) 20 to 30 psig (1.04 to 2.01 bar) Up to 17 psig (1.02 bar) differential pressure 132 CH Series Check Valves 6 Material 5 Component 7 (Material Grade/ASTM Specification) 1 Inlet Body 316SS / A479 4 3 2 Bonded Poppet Fluorocarbon FKM - Bonded 316SS / A479 2 1 3 Poppet Stop 316SS / A240 4 Spring 302SS / A313 5 O-Ring Fluorocarbon FKM 6 Backup Ring PTFE / D1710 7 Outlet Body 316SS / A479 Cv = 0.67 Cracking = 1 psig Cv = 0.67 Cracking = 10 psig Water Flow (U.S. gal / min) 3 Air Flow (std ft / min) 0 0.26 0.53 0.79 1.06 1.32 1.59 1.85 2.11 80 5.52 0 3.5 7.1 10.6 14.1 17.7 21.2 24.7 28.3 31.8 35.3 38.8 42.4 45.9 49.4 140 9.65 130 8.96 70 4.83 120 8.27 110 7.58 60 4.14 Inlet Pressure, bar Inlet Pressure, bar 100 6.89 90 6.21 50 3.45 80 5.52 70 4.83 40 2.76 60 4.14 50 3.45 30 2.07 40 2.76 Check Valve Inlet Pressure, psig Inlet Pressure, psig 30 2.07 20 1.38 20 1.38 10 0.69 10 0.69 0 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 0 0 s Air Flow (std L / min) 0 1 2 3 4 5 6 7 8 Water Flow (L / min) Cv = 1.8 Cracking = 1 psig Cv = 1.8 Cracking = 10 psig 3 Air Flow (std ft / min) Water Flow (U.S. gal / min) 0 7.1 14.1 21.2 28.3 35.3 42.4 49.4 56.5 63.6 70.6 77.7 84.8 91.8 98.9 0 0.53 1.06 1.59 2.11 2.64 3.17 3.70 4.23 4.76 5.28 100 6.89 50 3.45 90 6.21 45 3.10 80 5.52 40 2.76 Inlet Pressure, bar Inlet Pressure, bar 70 4.83 35 2.41 60 4.14 30 2.07 50 3.45 25 1.72 40 2.76 20 1.38 30 2.07 15 1.03 Inlet Pressure, psig Inlet Pressure, psig 20 1.38 10 0.69 10 0.69 5 0.34 0 0 0 0 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 0 2 4 6 8 10 12 14 16 18 20 Air Flow (std L / min) Water Flow (L / min) 133 ® Temperature - Pressure Ratings Pressure Temperature s End Connection Pressure Rating Part Interchanges Check Valve At 100°F (37°C) Cv OAL HEX Number With Type Size psig (bar) 1/4 SS-CH-D4D4- SS-CHS4- 0.67 2.43 1/16 3/8 SS-CH-D6D6- SS-CHS6- 6000 (413) 2.75 CBC-Lok® 1.80 1 Tube Fitting 1/2 SS-CH-D8D8- SS-CHS8- 2.96 3/4 SS-CH-D12D12- SS-CHS12- 5000 (344) 4.70 3.52 1-5/8 1/4 SS-CH-S4S4- - 0.67 2.43 11/16 3/8 SS-CH-S6S6- - 6000 (413) 2.75 CS-Lok® 1.80 1 Tube Fitting 1/2 SS-CH-S8S8- - 2.96 3/4 SS-CH-S12S12- - 5000 (344) 4.70 3.52 1-5/8 134.