4820-00-202-6821 VALVE,STOP-CHECK Index 4820-00-202-6825 VALVE,STOP-CHECK

National Stock Number:
4820-00-202-6822

Federal Supply Class:
4820

National Item Identification Number:
002026822

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:
4824-3132361REVDPC1-4-6T08-11-1-80064NAVAL SHIP SYSTEMS COMMAND


Techincal Specification:
BOLT CIRCLE NOMINAL DIAMETER3.938 INCHES 1ST END
BOLT HOLE NOMINAL DIAMETER0.562 INCHES 1ST END
BOLT HOLE QUANTITY6 1ST END
BONNET ATTACHMENT METHODBOLTED
BONNET TYPEINSIDE SCREW
CONNECTION TYPEFLANGE 1ST END
EXTRA LONG REFERENCE NUMBER4824-3132361REVDPC1-4-6T08-11-1-00
FACE TO FACE DISTANCE10.250 INCHES
FLANGE FACE DESIGNPLAIN 1ST END
FLANGE SHAPEROUND WITH HOLES 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 DIAMETER5.062 INCHES 1ST END
NOMINAL THICKNESS0.812 INCHES 1ST END
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSDRAWING NO.
RENEWABLE SEAT RING TYPETHREADED
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
VALVE OPERATION METHODMANUAL
VALVE SIZE1.500 INCHES


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