Walworth Check valve P/N 428WS1 1-2 Size 11/2" 300SWP 600WOG CID 882032116 MATERIAL DOCUMENT AND CLASSIFICATION ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE BODY ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE CONNECTION TYPE UNTHREADED INTERNAL PIPE 1ST END MEDIA FOR WHICH DESIGNED STEAM 1ST RESPONSE WATER-OIL-GAS 2ND RESPONSE MAXIMUM OPERATING PRESSURE 300.0 POUNDS PER SQUARE INCH 1ST RESPONSE 1000.0 POUNDS PER SQUARE INCH 2ND RESPONSE NOMINAL PIPE SIZE ACCOMMODATED 1.500 INCHES 1ST END FLOW CONTROL DEVICE DISK MOUNTING POSITION HORIZONTAL CONNECTION STYLE B22B STREAMLINED W/TWO BRAZING RINGS 1ST END STYLE DESIGNATOR A4 STRAIGHT THRU MAXIMUM OPERATING TEMP 550.0 DEG FAHRENHEIT 1ST RESPONSE 150.0 DEG FAHRENHEIT 2ND RESPONSE VALVE OPERATION METHOD AUTOMATIC MATERIAL COPPER ALLOY BODY COPPER ALLOY FLOW CONTROL DEVICE COPPER ALLOY SEAT Walworth valve