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PartsTable / COMPONENT / 40478-1 PIECE 25
40478-1 PIECE 25 ✓ 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 STEM,FLUID VALVE is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: BACK UP RING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-233-4876, 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
40478-1 PIECE 25
NSN: 4820-01-233-4876
FSC: 4820
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyBACK UP RING
NSN4820-01-233-4876
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 40478-1 PIECE 25 · 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
PVR18K27Interchangeable
interchangeable cross-reference
interchangeable
101700Interchangeable
interchangeable cross-reference
interchangeable
MIL-I-27710Interchangeable
interchangeable cross-reference
interchangeable
ARU-13/AInterchangeable
interchangeable cross-reference
interchangeable
101700-1Interchangeable
interchangeable cross-reference
interchangeable
1491-300-IT11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40478-1 PIECE 25?
40478-1 PIECE 25 is a STEM,FLUID VALVE.
What parts can replace 40478-1 PIECE 25?
There are 7 known substitutes for 40478-1 PIECE 25: PVR18K27, 101700, MIL-I-27710 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40478-1 PIECE 25?
40478-1 PIECE 25 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-233-4876. 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