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8511447 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

8511447: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, taper_length: 0.625 INCHES NOMINAL IN, flange_diameter: 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN, style_designator: PLAIN FLANGED, seat_angle_in_deg: 45.000 NOMINAL, under_flange_height: 0.438 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-564-9891, 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
8511447
NSN: 4820-00-564-9891
FSC: 4820 — Valves, Nonpowered
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
taper_length0.625 INCHES NOMINAL IN
flange_diameter0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
style_designatorPLAIN FLANGED
seat_angle_in_deg45.000 NOMINAL
under_flange_height0.438 INCHES NOMINAL IN
body_inside_diameter0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
taper_major_diameter0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
taper_minor_diameter0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
body_outside_diameter0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
seating_surface_shapeANGULAR
flange_seat_to_disk_end_height0.188 INCHES NOMINAL IN
NSN4820-00-564-9891
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8511447 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 0.188 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
TAPER MINOR DIAMETER: 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-325 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
TAPER MAJOR DIAMETER: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.188 INCHES NOMINAL IN
FLANGE DIAMETER0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
TAPER MINOR DIAMETER0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-325 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TAPER MAJOR DIAMETER0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
TAPER LENGTH0.625 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.438 INCHES NOMINAL 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 8511447?
8511447 is a SEAT,VALVE.
What is the NSN for 8511447?
8511447 is cataloged in the U.S. Government catalog under NSN 4820-00-564-9891. 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.