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National Stock Number:
4820-00-203-7917
Federal Supply Class:
4820
National Item Identification Number:
002037917
Description:
VALVE,STOP-CHECK
Detail:
A VALVE WITH A BOLT OR STEM THAT MAY BE MECHANICALLY ACTUATED TO TWO DIFFERENT POSITIONS BY ROTARY OR LINEAR MOTION. IN THE FIRST POSITION, THE VALVE DISK IS LOCATED AND LOCKED AGAINST THE SEAT PERMITTING NO FLUID FLOW THROUGH THE VALVE. IN THE SECOND POSITION, ONE SIDE OF THE VALVE DISK IS LOCATED AGAINST THE SEAT PERMITTING MOVEMENT OF THE DISK IN A MANNER THAT WILL ALLOW A FLOW OF FLUID IN ONE DIRECTION THROUGH THE VALVE. THE VALVE DISK MAY BE SPRING LOADED. IT MAY BE INLINE OR CARTRIDGE (MANIFOLD) DESIGN. SEE ALSO VALVE (1), LIFT-CHECK AND VALVE (1), STOP-LIFT-CHECK.
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Techincal Specification:
| BOLT CIRCLE NOMINAL DIAMETER | 5.000 INCHES ALL ENDS | | BOLT HOLE NOMINAL DIAMETER | 0.562 INCHES ALL ENDS | | BOLT HOLE QUANTITY | 6 ALL ENDS | | BONNET ATTACHMENT METHOD | THREADED | | BONNET TYPE | INSIDE SCREW | | CONNECTION TYPE | FLANGE ALL ENDS | | FIRST CONNECTION FACE TO CENTERLINE DISTANCE | 4.500 INCHES | | FLANGE FACE DESIGN | PLAIN ALL ENDS | | FLANGE SHAPE | ROUND WITH HOLES ALL ENDS | | FLOW CONTROL DEVICE | DISK | | MATERIAL | COPPER ALLOY 922 BODY | | MATERIAL | COPPER ALLOY 922 FLOW CONTROL DEVICE | | MATERIAL | COPPER ALLOY 922 SEAT | | MATERIAL | NICKEL ALLOY STEM | | MAXIMUM OPERATING PRESSURE | 100.0 POUNDS PER SQUARE INCH SINGLE RESPONSE | | MAXIMUM OPERATING TEMP | 425.0 FAHRENHEIT SINGLE RESPONSE | | MEDIA FOR WHICH DESIGNED | STEAM SINGLE RESPONSE | | MOUNTING POSITION | HORIZONTAL OR VERTICAL | | NOMINAL OUTSIDE DIAMETER | 6.125 INCHES ALL ENDS | | NOMINAL THICKNESS | 0.500 INCHES ALL ENDS | | SECOND CONNECTION FACE TO CENTERLINE DISTANCE | 4.500 INCHES | | STYLE DESIGNATOR | ANGLE FLANGED ENDS | | VALVE OPERATION METHOD | MANUAL | | VALVE SIZE | 2.500 INCHES |
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