| CONNECTION TYPE | UNTHREADED INTERNAL PIPE ALL ENDS |
| CONNECTION STYLE | SOCKET (PIPE) ALL ENDS |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM-D2000 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281 CL. B FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281 CL. B FED SPEC SINGLE MATERIAL RESPONSE STEM |
| MATERIAL | COPPER ALLOY BODY |
| MATERIAL | NICKEL ALLOY SEAT |
| MATERIAL | NICKEL ALLOY STEM |
| MATERIAL | RUBBER SYNTHETIC FLOW CONTROL DEVICE |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | 3/8" 81PM-1 CHECK VALVE |
| PROPRIETARY CHARACTERISTICS | PACS |
| MAXIMUM OPERATING PRESSURE | 250.0 POUNDS PER SQUARE INCH SINGLE RESPONSE |
| NOMINAL PIPE SIZE ACCOMMODATED | 0.3750 INCHES ALL ENDS |
| SPECIAL FEATURES | VALVE ACTUALLY HAS THREE END CONNECTIONS. 1 INLET, 1 OUT, AND 1 ACTUATING PRESSURE END |
| SPECIFICATION/STANDARD DATA | 81349-MIL-V-17501 MODIFIED TYPE 1 CLASS 1 & 2 GOVERNMENT SPECIFICATION |
| VALVE OPERATION METHOD | AUTOMATIC |
| STYLE DESIGNATOR | ANGLE |