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D139-18-954ITEM4 — PARTS KIT,BUTTERFLY VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

D139-18-954ITEM4: PARTS KIT,BUTTERFLY VALVE.

The PARTS KIT,BUTTERFLY VALVE is a the manufacturer industrial component. Key specifications include special_features: SEAT MADE OF VITON. INCLUDES 1X VITON SEAT P/N 440-206-180-139-000 AND 2X BUNA(N) O-RINGS P/N 230-927-225-730-000., end_item_identification: CVN REACTOR BOUNDRY AREA; BUTTERFLY VALVE 18.0IN IN, part_name_assigned_by_controlling_agency: PARTS KIT BUTTERFLY VALVE.

This part is cataloged in the U.S. Government catalog under NSN 4820-01-554-5400, 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
D139-18-954ITEM4
NSN: 4820-01-554-5400
FSC: 4820 — Valves, Nonpowered
CAGE: 04613 — EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP (USA)
SPECIFICATIONS
special_featuresSEAT MADE OF VITON. INCLUDES 1X VITON SEAT P/N 440-206-180-139-000 AND 2X BUNA(N) O-RINGS P/N 230-927-225-730-000.
end_item_identificationCVN REACTOR BOUNDRY AREA; BUTTERFLY VALVE 18.0IN IN
part_name_assigned_by_controlling_agencyPARTS KIT BUTTERFLY VALVE
NSN4820-01-554-5400
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: D139-18-954ITEM4 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESSEAT MADE OF VITON. INCLUDES 1X VITON SEAT P/N 440-206-180-139-000 AND 2X BUNA(N) O-RINGS P/N 230-927-225-730-000.
PART NAME ASSIGNED BY CONTROLLING AGENCYPARTS KIT BUTTERFLY VALVE
END ITEM IDENTIFICATIONCVN REACTOR BOUNDRY AREA; BUTTERFLY VALVE 18.0IN IN
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
440-206-180-139-000Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D139-18-954ITEM4?
D139-18-954ITEM4 is a PARTS KIT,BUTTERFLY VALVE.
What parts can replace D139-18-954ITEM4?
There is 1 known substitute for D139-18-954ITEM4: 440-206-180-139-000. Substitute compatibility should be verified for your specific system.
What is the NSN for D139-18-954ITEM4?
D139-18-954ITEM4 is cataloged in the U.S. Government catalog under NSN 4820-01-554-5400. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.