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Technical Data Sheet
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VR4125BR — VR4125BR

✓ Government record, cited
AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC · GATE VALVE
PRODUCT OVERVIEW

VR4125BR: VR4125BR.

The VR4125BR is a AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC industrial component. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-457-5860, 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
VR4125BR
NSN: 4820-01-457-5860
FSC: 4820 — Valves, Nonpowered
CAGE: 42905 — AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC (USA)
SPECIFICATIONS
Part NumberVR4125BR
ManufacturerAIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC
NSN4820-01-457-5860
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: VR4125BR · AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC ⚠ 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
•
OPENING PRESSURE SETTING: 125.0 POUNDS PER SQUARE INCH LBS
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONLOS ANGELES CLASS SSN(688)
OPENING PRESSURE SETTING125.0 POUNDS PER SQUARE INCH LBS
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 1
BB100NNS26 ITEM 31Same 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
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FREQUENTLY ASKED QUESTIONS
What is VR4125BR?
VR4125BR is a VR4125BR manufactured by AIR SYSTEMS INTERNATIONAL, INC. (USED IN VA BY: AIR SYSTEMS, INC.) DBA AIR SYSTEMS INTERNATIONAL INC.
What parts can replace VR4125BR?
There is 1 known substitute for VR4125BR: BB100NNS26 ITEM 31. Substitute compatibility should be verified for your specific system.
What is the NSN for VR4125BR?
VR4125BR is cataloged in the U.S. Government catalog under NSN 4820-01-457-5860. 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.