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VA-1998 PIECE 6 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

VA-1998 PIECE 6: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, taper_length: 0.656 INCHES NOMINAL IN, overall_height: 0.873 INCHES NOMINAL IN, style_designator: PLAIN, body_inside_diameter: 6.000 INCHES NOMINAL IN, taper_major_diameter: 7.297 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-137-5346, 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
VA-1998 PIECE 6
NSN: 4820-01-137-5346
FSC: 4820 — Valves, Nonpowered
CAGE: 27424 — MORLAND VALVE CO INC SUB OF SMITH VALVE CORP (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
taper_length0.656 INCHES NOMINAL IN
overall_height0.873 INCHES NOMINAL IN
style_designatorPLAIN
body_inside_diameter6.000 INCHES NOMINAL IN
taper_major_diameter7.297 INCHES NOMINAL IN
taper_minor_diameter6.000 INCHES NOMINAL IN
body_outside_diameter8.000 INCHES NOMINAL IN
seating_surface_shapeFLAT
NSN4820-01-137-5346
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: VA-1998 PIECE 6 · 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
•
BODY OUTSIDE DIAMETER: 8.000 INCHES NOMINAL IN
•
TAPER MINOR DIAMETER: 6.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
TAPER MAJOR DIAMETER: 7.297 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 6.000 INCHES NOMINAL IN
•
TAPER LENGTH: 0.656 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.873 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER8.000 INCHES NOMINAL IN
TAPER MINOR DIAMETER6.000 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
TAPER MAJOR DIAMETER7.297 INCHES NOMINAL IN
BODY INSIDE DIAMETER6.000 INCHES NOMINAL IN
TAPER LENGTH0.656 INCHES NOMINAL IN
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE 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 1
VA-1998 PIECE 60Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is VA-1998 PIECE 6?
VA-1998 PIECE 6 is a SEAT,VALVE.
What parts can replace VA-1998 PIECE 6?
There is 1 known substitute for VA-1998 PIECE 6: VA-1998 PIECE 60. Substitute compatibility should be verified for your specific system.
What is the NSN for VA-1998 PIECE 6?
VA-1998 PIECE 6 is cataloged in the U.S. Government catalog under NSN 4820-01-137-5346. 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.