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B-6522 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

B-6522: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE SEAT, special_features: GLASS CARBON FILLED POLYTETRAFLUOROETHYLENE SEAT; FOR 8.000 IN. BALL VALVE IN.

This part is cataloged in the U.S. Government catalog under NSN 4820-01-368-7576, 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
B-6522
NSN: 4820-01-368-7576
FSC: 4820 — Valves, Nonpowered
CAGE: 11859 — HUNT VALVE COMPANY, INC. (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE SEAT
special_featuresGLASS CARBON FILLED POLYTETRAFLUOROETHYLENE SEAT; FOR 8.000 IN. BALL VALVE IN
NSN4820-01-368-7576
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: B-6522 · 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
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE SEAT
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESGLASS CARBON FILLED POLYTETRAFLUOROETHYLENE SEAT; FOR 8.000 IN. BALL VALVE IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE SEAT
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
D-6665 PIECE 10AReference 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 B-6522?
B-6522 is a SEAT,VALVE.
What parts can replace B-6522?
There is 1 known substitute for B-6522: D-6665 PIECE 10A. Substitute compatibility should be verified for your specific system.
What is the NSN for B-6522?
B-6522 is cataloged in the U.S. Government catalog under NSN 4820-01-368-7576. 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.