Stockham Check Valve P/N 20-SSW-316L-1IN Size 1" STYLE DESIGNATOR A2 STRAIGHT THRU CONNECTION TYPE UNTHREADED INTERNAL PIPE ALL ENDS VALVE OPERATION METHOD AUTOMATIC NOMINAL PIPE SIZE ACCOMMODATED 1.000 INCHES ALL ENDS MATERIAL DOCUMENT AND CLASSIFICATION ASTM A351, GRADE CF8M ASSN STD SINGLE MATERIAL RESPONSE BODY ASTM A276, TYPE 303 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE MATERIAL STEEL COMP 316L BODY STEEL CORROSION RESISTING FLOW CONTROL DEVICE MAXIMUM OPERATING PRESSURE 150.0 POUNDS PER SQUARE INCH SINGLE RESPONSE MOUNTING POSITION HORIZONTAL CONNECTION STYLE B20B SOCKET ALL ENDS FLOW CONTROL DEVICE DISK STOCKHAM VALVE