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2158954 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

2158954: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE OVERALL, taper_length: 0.144 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, taper_major_diameter: 0.940 INCHES NOMINAL IN, taper_minor_diameter: 0.654 INCHES NOMINAL IN, seating_surface_shape: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-159-7021, 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
2158954
NSN: 4820-01-159-7021
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialRUBBER SILICONE OVERALL
taper_length0.144 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
taper_major_diameter0.940 INCHES NOMINAL IN
taper_minor_diameter0.654 INCHES NOMINAL IN
seating_surface_shapeFLAT
NSN4820-01-159-7021
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2158954 · 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
•
TAPER MINOR DIAMETER: 0.654 INCHES NOMINAL IN
•
TAPER MAJOR DIAMETER: 0.940 INCHES NOMINAL IN
•
TAPER LENGTH: 0.144 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SILICONE OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
TAPER MINOR DIAMETER0.654 INCHES NOMINAL IN
TAPER MAJOR DIAMETER0.940 INCHES NOMINAL IN
TAPER LENGTH0.144 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
MATERIALRUBBER SILICONE OVERALL
SEATING SURFACE SHAPEFLAT
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
2452712Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 2158954?
2158954 is a SEAT,VALVE.
What parts can replace 2158954?
There is 1 known substitute for 2158954: 2452712. Substitute compatibility should be verified for your specific system.
What is the NSN for 2158954?
2158954 is cataloged in the U.S. Government catalog under NSN 4820-01-159-7021. 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.