PartsTable
Technical Data Sheet
A51H9221-3 ✓ 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,RESTRICTOR CHECK is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, thread_class: 3B FIRST END, connection_type: THREADED INTERNAL BOSS FIRST END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND SECOND END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-574-5643, 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
A51H9221-3
NSN: 4820-00-574-5643
FSC: 4820
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
thread_class3B FIRST END
connection_typeTHREADED INTERNAL BOSS FIRST END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND SECOND END
mounting_positionHORIZONTAL OR VERTICAL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_devicePOPPET
nominal_thread_size0.562 INCHES FIRST END IN
valve_operation_methodAUTOMATIC
NSN4820-00-574-5643
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: A51H9221-3 · 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
CONNECTION STYLE: GASKET SEAL (BOSS) FIRST END
MOUNTING POSITION: HORIZONTAL OR VERTICAL
VALVE OPERATION METHOD: AUTOMATIC
THREAD QUANTITY PER INCH: 18 FIRST END
THREAD DIRECTION: RIGHT-HAND FIRST END
CONNECTION TYPE: THREADED EXTERNAL BOSS SECOND END
THREAD CLASS: 3A SECOND END A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEGASKET SEAL (BOSS) FIRST END
MOUNTING POSITIONHORIZONTAL OR VERTICAL
VALVE OPERATION METHODAUTOMATIC
THREAD QUANTITY PER INCH18 FIRST END
THREAD DIRECTIONRIGHT-HAND FIRST END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
THREAD CLASS3A SECOND END A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES FIRST END IN
MATERIALALUMINUM ALLOY OVERALL
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
61254Interchangeable
interchangeable cross-reference
interchangeable
10-504088Interchangeable
interchangeable cross-reference
interchangeable
6191Interchangeable
interchangeable cross-reference
interchangeable
537.8438Interchangeable
interchangeable cross-reference
interchangeable
50-10159Interchangeable
interchangeable cross-reference
interchangeable
GGG-R-180Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy A51H9221-3?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is A51H9221-3?
A51H9221-3 is a VALVE,RESTRICTOR CHECK.
What parts can replace A51H9221-3?
There are 10 known substitutes for A51H9221-3: 61254, 10-504088, 6191 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A51H9221-3?
A51H9221-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-574-5643. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — A51H9221-3