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P11521 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

P11521: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL OR COPPER ALLOY OVERALL, flange_diameter: 0.547 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, under_flange_height: 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN, body_inside_diameter: 0.172 INCHES NOMINAL IN, fsc_application_data: FEEDER,WATER METER DRIVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-424-2731, 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
P11521
NSN: 4820-00-424-2731
FSC: 4820 — Valves, Nonpowered
CAGE: 79172 — SIEMENS WATER TECHNOLOGIES CORP. DIV WALLACE & TIERNAN PRODUCTS (USA)
SPECIFICATIONS
materialNICKEL OR COPPER ALLOY OVERALL
flange_diameter0.547 INCHES NOMINAL IN
style_designatorPLAIN FLANGED
under_flange_height0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
body_inside_diameter0.172 INCHES NOMINAL IN
fsc_application_dataFEEDER,WATER METER DRIVE
body_outside_diameter0.250 INCHES NOMINAL IN
seating_surface_shapeFLAT
flange_seat_to_disk_end_height0.125 INCHES NOMINAL IN
NSN4820-00-424-2731
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: P11521 · 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: 0.125 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.547 INCHES NOMINAL IN
•
FSC APPLICATION DATA: FEEDER,WATER METER DRIVE
•
BODY OUTSIDE DIAMETER: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.172 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
MATERIAL: NICKEL OR COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.125 INCHES NOMINAL IN
FLANGE DIAMETER0.547 INCHES NOMINAL IN
FSC APPLICATION DATAFEEDER,WATER METER DRIVE
BODY OUTSIDE DIAMETER0.250 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.172 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
MATERIALNICKEL OR COPPER ALLOY 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

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 P11521?
P11521 is a SEAT,VALVE.
What is the NSN for P11521?
P11521 is cataloged in the U.S. Government catalog under NSN 4820-00-424-2731. 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.