PartsTable
Technical Data Sheet
Download PDF

LHD8428 ITEM 3 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

LHD8428 ITEM 3: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, style_designator: PLAIN, seating_surface_shape: O-RING, end_item_identification: WILLIAMS 8 IN. GATE VALVE,LHD8428 IN, seal_accommodation_type: GROOVED.

This part is cataloged in the U.S. Government catalog under NSN 4820-01-281-1637, 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
LHD8428 ITEM 3
NSN: 4820-01-281-1637
FSC: 4820 — Valves, Nonpowered
CAGE: 79342 — WILLIAM E WILLIAMS VALVE CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
style_designatorPLAIN
seating_surface_shapeO-RING
end_item_identificationWILLIAMS 8 IN. GATE VALVE,LHD8428 IN
seal_accommodation_typeGROOVED
NSN4820-01-281-1637
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: LHD8428 ITEM 3 · 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: GROOVED
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: STEEL OVERALL
•
SEATING SURFACE SHAPE: O-RING
TECHNICAL CHARACTERISTICS
SEAL ACCOMMODATION TYPEGROOVED
STYLE DESIGNATORPLAIN
END ITEM IDENTIFICATIONWILLIAMS 8 IN. GATE VALVE,LHD8428 IN
MATERIALSTEEL OVERALL
SEATING SURFACE SHAPEO-RING
SUBSTITUTES & CROSS-REFERENCES 1
LHD8428Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy LHD8428 ITEM 3?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is LHD8428 ITEM 3?
LHD8428 ITEM 3 is a SEAT,VALVE.
What parts can replace LHD8428 ITEM 3?
There is 1 known substitute for LHD8428 ITEM 3: LHD8428. Substitute compatibility should be verified for your specific system.
What is the NSN for LHD8428 ITEM 3?
LHD8428 ITEM 3 is cataloged in the U.S. Government catalog under NSN 4820-01-281-1637. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — LHD8428 ITEM 3

✓ 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.