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D20305 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

D20305: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include height: 21.000 INCHES NOMINAL IN, material: STEEL BODY, seat_angle: 45.0 DEGREES NOMINAL, valve_size: 12.000 INCHES IN, taper_length: 12.062 INCHES NOMINAL IN, overall_height: 1.439 INCHES MINIMUM AND 2.372 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-425-4242, 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
D20305
NSN: 4820-01-425-4242
NIINs: 014254242, 014284454, 014284455, 014286425
FSC: 4820 — Valves, Nonpowered
CAGE: 85130 — FLOWSERVE CORPORATION DIV FLOWSERVE US INC (USA)
SPECIFICATIONS
height21.000 INCHES NOMINAL IN
materialSTEEL BODY
seat_angle45.0 DEGREES NOMINAL
valve_size12.000 INCHES IN
taper_length12.062 INCHES NOMINAL IN
overall_height1.439 INCHES MINIMUM AND 2.372 INCHES MAXIMUM IN
connection_typeBUTT WELD PIPE
outside_diameter12.000 INCHES NOMINAL IN
style_designatorSOLID WEDGE
attachment_methodRETAINING RING
seat_angle_in_deg5.000 NOMINAL
body_inside_diameter10.500 INCHES NOMINAL IN
NSN4820-01-425-4242
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: D20305 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 BY-PASS
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
CONNECTION TYPE: BUTT WELD PIPE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE STEM
•
VALVE SIZE: 12.000 INCHES IN
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 BY-PASS
CRITICALITY CODE JUSTIFICATIONZZZY
CONNECTION TYPEBUTT WELD PIPE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A276 ASSN STD SINGLE MATERIAL RESPONSE STEM
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A1823 ASSN STD SINGLE MATERIAL RESPONSE SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A217 ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A217 ASSN STD SINGLE MATERIAL RESPONSE DISK
VALVE SIZE12.000 INCHES IN
MATERIALSTEEL BODY
MATERIALSTEEL DISK
SUBSTITUTES & CROSS-REFERENCES 1
D20305S1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is D20305?
D20305 is a DISK,VALVE.
What parts can replace D20305?
There is 1 known substitute for D20305: D20305S1. Substitute compatibility should be verified for your specific system.
What is the NSN for D20305?
D20305 is cataloged in the U.S. Government catalog under NSN 4820-01-425-4242. 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.