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PartsTable / COMPONENT / 8988 ITEM 3
8988 ITEM 3 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL SEAT, style_designator: PLAIN, seating_surface_shape: FLAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-311-8393, 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
8988 ITEM 3
NSN: 4820-01-311-8393
FSC: 4820
CAGE: 79342 — WILLIAM E WILLIAMS VALVE CORP (USA)
SPECIFICATIONS
materialSTEEL SEAT
style_designatorPLAIN
seating_surface_shapeFLAT
NSN4820-01-311-8393
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8988 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
•
SEATING SURFACE SHAPE: FLAT
•
MATERIAL: STEEL SEAT
•
STYLE DESIGNATOR: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
SEATING SURFACE SHAPEFLAT
MATERIALSTEEL SEAT
STYLE DESIGNATORPLAIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
8988Interchangeable
interchangeable cross-reference
interchangeable
1M141-1Interchangeable
interchangeable cross-reference
interchangeable
S193CLInterchangeable
interchangeable cross-reference
interchangeable
13B22703Interchangeable
interchangeable cross-reference
interchangeable
191Interchangeable
interchangeable cross-reference
interchangeable
M8988Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8988 ITEM 3?
8988 ITEM 3 is a SEAT,VALVE.
What parts can replace 8988 ITEM 3?
There are 7 known substitutes for 8988 ITEM 3: 8988, 1M141-1, S193CL and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8988 ITEM 3?
8988 ITEM 3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-311-8393. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026