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328D450PC3 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

328D450PC3: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include seat_radius: 1.042 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN, flange_diameter: 4.750 INCHES MINIMUM AND 4.751 INCHES MAXIMUM IN, style_designator: PLAIN FLANGED, under_flange_height: 2.938 INCHES NOMINAL IN, body_inside_diameter: 3.013 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN, body_outside_diameter: 3.812 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-976-3236, 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
328D450PC3
NSN: 4820-00-976-3236
FSC: 4820 — Valves, Nonpowered
CAGE: 24446 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
seat_radius1.042 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
flange_diameter4.750 INCHES MINIMUM AND 4.751 INCHES MAXIMUM IN
style_designatorPLAIN FLANGED
under_flange_height2.938 INCHES NOMINAL IN
body_inside_diameter3.013 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
body_outside_diameter3.812 INCHES NOMINAL IN
seating_surface_shapeRADIAL
flange_seat_to_disk_end_height0.898 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
NSN4820-00-976-3236
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 328D450PC3 · 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: 0.898 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 4.750 INCHES MINIMUM AND 4.751 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 3.812 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 3.013 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
•
SEAT RADIUS: 1.042 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
•
UNDER FLANGE HEIGHT: 2.938 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: RADIAL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.898 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN
FLANGE DIAMETER4.750 INCHES MINIMUM AND 4.751 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER3.812 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER3.013 INCHES MINIMUM AND 3.015 INCHES MAXIMUM IN
SEAT RADIUS1.042 INCHES MINIMUM AND 1.052 INCHES MAXIMUM IN
UNDER FLANGE HEIGHT2.938 INCHES NOMINAL IN
SEATING SURFACE SHAPERADIAL
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 2
137B367Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
328D450Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 328D450PC3?
328D450PC3 is a SEAT,VALVE.
What parts can replace 328D450PC3?
There are 2 known substitutes for 328D450PC3: 137B367, 328D450. Substitute compatibility should be verified for your specific system.
What is the NSN for 328D450PC3?
328D450PC3 is cataloged in the U.S. Government catalog under NSN 4820-00-976-3236. 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.