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20566-H PIECE 4 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

20566-H PIECE 4: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, pressure_rating: 600.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS, media_for_which_designed: STEAM. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-196-4031, 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
20566-H PIECE 4
NSN: 4820-01-196-4031
FSC: 4820 — Valves, Nonpowered
CAGE: 04537 — ATWOOD & MORRILL CO., INC. DBA WEIR VALVES AND CONTROLS USA (USA)
SPECIFICATIONS
materialSTEEL
pressure_rating600.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
media_for_which_designedSTEAM
NSN4820-01-196-4031
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20566-H PIECE 4 · 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
•
PRESSURE RATING: 600.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
MEDIA FOR WHICH DESIGNED: STEAM
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
PRESSURE RATING600.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
MEDIA FOR WHICH DESIGNEDSTEAM
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 1
20566-HReference 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
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FREQUENTLY ASKED QUESTIONS
What is 20566-H PIECE 4?
20566-H PIECE 4 is a DISK,VALVE.
What parts can replace 20566-H PIECE 4?
There is 1 known substitute for 20566-H PIECE 4: 20566-H. Substitute compatibility should be verified for your specific system.
What is the NSN for 20566-H PIECE 4?
20566-H PIECE 4 is cataloged in the U.S. Government catalog under NSN 4820-01-196-4031. 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.