4820-00-202-6820 VALVE,STOP-CHECK Index 4820-00-202-6822 VALVE,STOP-CHECK

National Stock Number:
4820-00-202-6821

Federal Supply Class:
4820

National Item Identification Number:
002026821

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:
3600-12096169ELECTRIC BOAT CORPORATION
S4824-3132363ASSYGLBSTPCHK80064NAVAL SHIP SYSTEMS COMMAND
X167971905DERBYSHIRE MACHINE & TOOL CO


Techincal Specification:
BONNET ATTACHMENT METHODBOLTED
BONNET TYPEINSIDE SCREW
CONNECTION TYPEFLANGE 1ST END
FACE TO FACE DISTANCE12.500 INCHES
FLANGE FACE DESIGNPLAIN 1ST END
FLANGE SHAPEROUND 1ST END
FLOW CONTROL DEVICEDISK
MATERIALCOPPER ALLOY 903 BODY
MATERIALCOPPER ALLOY 903 FLOW CONTROL DEVICE
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 STEM
MATERIALNICKEL ALLOY 400 OR NICKEL ALLOY R-405 SEAT
MAXIMUM OPERATING PRESSURE500.0 POUNDS PER SQUARE INCH SINGLE RESPONSE
MEDIA FOR WHICH DESIGNEDWATER, SALT SINGLE RESPONSE
MOUNTING POSITIONHORIZONTAL OR VERTICAL
NOMINAL OUTSIDE DIAMETER6.125 INCHES 1ST END
NOMINAL THICKNESS0.938 INCHES 1ST END
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSASDIFFERENTIATED BY ITEM NAME AND FLANGE SHAPE STYLE
RENEWABLE SEAT RING TYPETHREADED
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
VALVE OPERATION METHODMANUAL
VALVE SIZE2.500 INCHES


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