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Technical Data Sheet
R51 ✓ Verified by PartsTable
· GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The VALVE,FIRE EXTINGUISHER is a the manufacturer industrial component. Key specifications include color: WHITE BORDER, width: 30.000 INCHES NOMINAL IN, length: 30.000 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING, end_style: FULL LOOP BOTH ENDS, thickness: 0.080 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-142-1523, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
R51
NSN: 4820-00-142-1523
FSC: 4820
CAGE: 33334 — KEROTEST MANUFACTURING CORP. (USA)
SPECIFICATIONS
colorWHITE BORDER
width30.000 INCHES NOMINAL IN
length30.000 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING
end_styleFULL LOOP BOTH ENDS
thickness0.080 INCHES NOMINAL IN
point_typeCONVENTIONAL
seat_angle45.0 DEGREES FIRST END
design_typeDIAMOND OR TRIANGLE
inscription1ST INSCRIPTION: DO NOT ENTER; 2ND INSCRIPTION: HORIZONTAL BAR
point_angle118.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
NSN4820-00-142-1523
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: R51 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
OPERATING PRESSURE: 235.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
ADJUSTABLE PRESSURE RANGE: +100.0 TO 500.0 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD SIZE: 0.875 INCHES FIRST END IN
SEAT ANGLE: 45.0 DEGREES FIRST END
MEDIA FOR WHICH DESIGNED: SULPHUR DIOXIDE, GASEOUS SINGLE RESPONSE
THREAD SERIES DESIGNATOR: NPTF SECOND END
THREAD DIRECTION: RIGHT-HAND SECOND END
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE235.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
ADJUSTABLE PRESSURE RANGE+100.0 TO 500.0 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD SIZE0.875 INCHES FIRST END IN
SEAT ANGLE45.0 DEGREES FIRST END
MEDIA FOR WHICH DESIGNEDSULPHUR DIOXIDE, GASEOUS SINGLE RESPONSE
THREAD SERIES DESIGNATORNPTF SECOND END
NOMINAL THREAD SIZE0.500 INCHES SECOND END IN
THREAD DIRECTIONRIGHT-HAND SECOND END
FLOW CONTROL DEVICEBALL
VALVE OPERATION METHODAUTOMATIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES

No verified substitutes available.

LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R51?
R51 is a VALVE,FIRE EXTINGUISHER.
What is the NSN for R51?
R51 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-142-1523. This indicates validated use in U.S. government and defense supply chains.
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