HSCE400BB Dixon Valve HSC Spring Check Valve - 4" Weld Connection - EPDM Gasket - 316L Stainless SteelFeatures: Machined from solid bar Standard O ring (EPDM) and gasket seal design Can be serviced in field (no special tools required) Finish: sanitary polish 32 Ra Temperature Range: 15 F to 200 F Part Number Size Cracking Pressure Max. Operating Pressure HSCE050BB 1 2" 10. 0 PSI 145 PSI HSCE075BB 3 4" 4. 0 PSI 145 PSI HSCE100BB 1" 2. 5 PSI 145 PSI HSCE150BB 1 1 2" 1. 0 PSI 145 PSI HSCE200BB 2" 1. 5 PSI 145 PSI HSCE250BB 2 1 2" 0. 8 PSI 145 PSI