PartsTable
Technical Data Sheet
Download PDF

4900BX — VALVE,VACUUM BREAKING

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

4900BX: VALVE,VACUUM BREAKING.

The VALVE,VACUUM BREAKING is a the manufacturer industrial component. Key specifications include face_to_face_distance: 1.625 INCHES NOMINAL IN, end_item_identification: CDF DOMESTIC HOT WATER SYSTEM, SAINT JOHN SHIPBUILDING LTD, first_end_nominal_pipe_size_accommodated: 0.500 INCHES IN, second_end_nominal_pipe_size_accommodated: 0.500 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-390-4886, 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
4900BX
NSN: 4820-01-390-4886
FSC: 4820 — Valves, Nonpowered
CAGE: 0XEF0 — ALSONS CORP (USA)
SPECIFICATIONS
face_to_face_distance1.625 INCHES NOMINAL IN
end_item_identificationCDF DOMESTIC HOT WATER SYSTEM, SAINT JOHN SHIPBUILDING LTD
first_end_nominal_pipe_size_accommodated0.500 INCHES IN
second_end_nominal_pipe_size_accommodated0.500 INCHES IN
NSN4820-01-390-4886
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 4900BX · 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
•
FACE TO FACE DISTANCE: 1.625 INCHES NOMINAL IN
•
SECOND END NOMINAL PIPE SIZE ACCOMMODATED: 0.500 INCHES IN
•
FIRST END NOMINAL PIPE SIZE ACCOMMODATED: 0.500 INCHES IN
TECHNICAL CHARACTERISTICS
FACE TO FACE DISTANCE1.625 INCHES NOMINAL IN
SECOND END NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES IN
END ITEM IDENTIFICATIONCDF DOMESTIC HOT WATER SYSTEM, SAINT JOHN SHIPBUILDING LTD
FIRST END NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES IN
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
141-319Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 4900BX?
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 4900BX?
4900BX is a VALVE,VACUUM BREAKING.
What parts can replace 4900BX?
There is 1 known substitute for 4900BX: 141-319. Substitute compatibility should be verified for your specific system.
What is the NSN for 4900BX?
4900BX is cataloged in the U.S. Government catalog under NSN 4820-01-390-4886. 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 — 4900BX

✓ 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.