PartsTable
Technical Data Sheet
Download PDF

421DV4NCSC SPENCER — VALVE,DIAPHRAGM,STOP

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

421DV4NCSC SPENCER: VALVE,DIAPHRAGM,STOP.

The VALVE,DIAPHRAGM,STOP is a the manufacturer industrial component. Key specifications include special_features: VALVE SIZE 1IN.; NORMALLY CLOSED IN, valve_operation_method: MANUAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-407-7554, 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
421DV4NCSC SPENCER
NSN: 4820-01-407-7554
FSC: 4820 — Valves, Nonpowered
CAGE: 04816 — AQUAMATIC INC (USA)
SPECIFICATIONS
special_featuresVALVE SIZE 1IN.; NORMALLY CLOSED IN
valve_operation_methodMANUAL
NSN4820-01-407-7554
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 421DV4NCSC SPENCER · 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
•
VALVE OPERATION METHOD: MANUAL
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESVALVE SIZE 1IN.; NORMALLY CLOSED IN
VALVE OPERATION METHODMANUAL
SUBSTITUTES & CROSS-REFERENCES 2
630575Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PL 423383-A ITEM 2Same 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)No demilitarization required
Ready to buy 421DV4NCSC SPENCER?
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 421DV4NCSC SPENCER?
421DV4NCSC SPENCER is a VALVE,DIAPHRAGM,STOP.
What parts can replace 421DV4NCSC SPENCER?
There are 2 known substitutes for 421DV4NCSC SPENCER: 630575, PL 423383-A ITEM 2. Substitute compatibility should be verified for your specific system.
What is the NSN for 421DV4NCSC SPENCER?
421DV4NCSC SPENCER is cataloged in the U.S. Government catalog under NSN 4820-01-407-7554. 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 — 421DV4NCSC SPENCER

✓ 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.