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6565-21-121-9101 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

6565-21-121-9101: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL BODY, style_designator: PLAIN FLANGED, surface_treatment: PASSIVATE BODY, seating_surface_shape: FLAT, seal_accommodation_type: SLEEVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-489-9541, 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
6565-21-121-9101
NSN: 4820-00-489-9541
FSC: 4820 — Valves, Nonpowered
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL BODY
style_designatorPLAIN FLANGED
surface_treatmentPASSIVATE BODY
seating_surface_shapeFLAT
seal_accommodation_typeSLEEVE
NSN4820-00-489-9541
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6565-21-121-9101 · 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
•
SEAL ACCOMMODATION TYPE: SLEEVE
•
STYLE DESIGNATOR: PLAIN FLANGED
•
SURFACE TREATMENT: PASSIVATE BODY
•
MATERIAL: STEEL BODY
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
SEAL ACCOMMODATION TYPESLEEVE
STYLE DESIGNATORPLAIN FLANGED
SURFACE TREATMENTPASSIVATE BODY
MATERIALSTEEL BODY
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6565-21-121-9101?
6565-21-121-9101 is a SEAT,VALVE.
What is the NSN for 6565-21-121-9101?
6565-21-121-9101 is cataloged in the U.S. Government catalog under NSN 4820-00-489-9541. 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.