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A31851 — VALVE,PNEUMATIC TANK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

A31851: VALVE,PNEUMATIC TANK.

The VALVE,PNEUMATIC TANK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, furnished_items: CAP, end_item_identification: RADAR AND IFF SYSTEM, media_for_which_designed: REFRIGERANT, core_environmental_protection: CORROSION, part_name_assigned_by_controlling_agency: REFRIGERATION ACCESS VALVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-506-7109, 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
A31851
NSN: 4820-01-506-7109
FSC: 4820 — Valves, Nonpowered
CAGE: 32402 — JB INDUSTRIES INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
furnished_itemsCAP
end_connection_quantity3
end_item_identificationRADAR AND IFF SYSTEM
media_for_which_designedREFRIGERANT
core_environmental_protectionCORROSION
part_name_assigned_by_controlling_agencyREFRIGERATION ACCESS VALVE
NSN4820-01-506-7109
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A31851 · 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
•
CORE ENVIRONMENTAL PROTECTION: CORROSION
•
END CONNECTION QUANTITY: 3
•
MEDIA FOR WHICH DESIGNED: REFRIGERANT
•
MATERIAL: COPPER ALLOY BODY
•
FURNISHED ITEMS: CAP
TECHNICAL CHARACTERISTICS
CORE ENVIRONMENTAL PROTECTIONCORROSION
END CONNECTION QUANTITY3
MEDIA FOR WHICH DESIGNEDREFRIGERANT
PART NAME ASSIGNED BY CONTROLLING AGENCYREFRIGERATION ACCESS VALVE
END ITEM IDENTIFICATIONRADAR AND IFF SYSTEM
MATERIALCOPPER ALLOY BODY
FURNISHED ITEMSCAP
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 2
3GD02Reference document
Same NSN cross-reference
Reference document — Secondary reference
20W308Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A31851?
A31851 is a VALVE,PNEUMATIC TANK.
What parts can replace A31851?
There are 2 known substitutes for A31851: 3GD02, 20W308. Substitute compatibility should be verified for your specific system.
What is the NSN for A31851?
A31851 is cataloged in the U.S. Government catalog under NSN 4820-01-506-7109. 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.