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PartsTable / COMPONENT / A51H9223-1
A51H9223-1 ✓ 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: COPPER ALLOY ACTUATING ELEMENT, dial_size: 2-1/2 IN. DIA IN, bezel_type: THREAD, body_style: STRAIGHT HANDLE, lens_color: AMBER, scale_name: PRESSURE.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-123-1902, 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
A51H9223-1
NSN: 4820-00-123-1902
FSC: 4820
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY ACTUATING ELEMENT
dial_size2-1/2 IN. DIA IN
bezel_typeTHREAD
body_styleSTRAIGHT HANDLE
lens_colorAMBER
scale_namePRESSURE
scale_typeSINGLE
body_length0.625 INCHES NOMINAL IN
finger_typeBANANA SPRING SINGLE FINGER
scale_range+0.0 TO 3000.0 POUNDS PRESSURE PER SQUARE INCH LBS
pointer_typeINDICATING
adjustabilityNONADJUSTABLE
NSN4820-00-123-1902
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A51H9223-1 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
455-101Interchangeable
interchangeable cross-reference
interchangeable
MILL3976Interchangeable
interchangeable cross-reference
interchangeable
928570Interchangeable
interchangeable cross-reference
interchangeable
7261919Interchangeable
interchangeable cross-reference
interchangeable
800B2502LA210Interchangeable
interchangeable cross-reference
interchangeable
3269882-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A51H9223-1?
A51H9223-1 is a VALVE,RESTRICTOR CHECK.
What parts can replace A51H9223-1?
There are 7 known substitutes for A51H9223-1: 455-101, MILL3976, 928570 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A51H9223-1?
A51H9223-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-123-1902. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026