4820-00-922-8420, VALVE,STOP-CHECK

National Stock Number:
4820-00-922-8420

Federal Supply Class:
4820

National Item Identification Number:
009228420

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.

Manufacturer Information:

2620-902ASSYE	63686	THE WALWORTH COMPANY
2620-902ASSYE	96169	ELECTRIC BOAT CORPORATION
2620-902ASSYEL1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
DS2140-1B260WS1INL1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
SS845-1889587ASSYE	80064	NAVAL SHIP SYSTEMS COMMAND
DS2140-1B260WS1IN	95995	WALWORTH CO THE
SS845-1889587ASSYEL1	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG

Techincal Specification:

BONNET TYPE	INSIDE SCREW
BONNET ATTACHMENT METHOD	UNION
CONNECTION STYLE	SOCKET WITH BRAZING RING (PIPE) FIRST END
CONNECTION TYPE	UNTHREADED INTERNAL PIPE FIRST END
CRITICALITY CODE JUSTIFICATION	ZZZY
FEATURES PROVIDED	BONNET PACKING
FLOW CONTROL DEVICE	DISK
MATERIAL	COPPER ALLOY BODY
MATERIAL	NICKEL ALLOY SEAT
MATERIAL	NICKEL ALLOY STEM
MAXIMUM OPERATING TEMP	150.0 FAHRENHEIT SINGLE RESPONSE
MEDIA FOR WHICH DESIGNED	WATER-OIL-GAS SINGLE RESPONSE
MOUNTING POSITION	HORIZONTAL
NOMINAL PIPE SIZE ACCOMMODATED	1.000 INCHES FIRST END
OPERATING PRESSURE	700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS	QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
RENEWABLE SEAT RING TYPE	THREADED
STYLE DESIGNATOR	STRAIGHT THRU
SUPPLEMENTARY FEATURES	VALVE OPERATION METHOD: HYDRAULIC

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