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3-1750FBC — VALVE,VENT-CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3-1750FBC: VALVE,VENT-CHECK.

The VALVE,VENT-CHECK is a the manufacturer industrial component. Key specifications include material: COPPER FLOW CONTROL DEVICE, valve_size: 3.000 INCHES IN, connection_type: FLANGE ALL ENDS, flow_control_device: BALL, valve_operation_method: AUTOMATIC, end_item_identification: VENT-FLAME ARRESTOR. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-535-8888, 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
3-1750FBC
NSN: 4820-01-535-8888
FSC: 4820 — Valves, Nonpowered
CAGE: 79128 — ROBERT H WAGER CO INC (USA)
SPECIFICATIONS
materialCOPPER FLOW CONTROL DEVICE
valve_size3.000 INCHES IN
connection_typeFLANGE ALL ENDS
flow_control_deviceBALL
valve_operation_methodAUTOMATIC
end_item_identificationVENT-FLAME ARRESTOR
furnished_items_and_quantity1 COVER AND 1 FLOAT AND 1 FILTER SCREEN
part_name_assigned_by_controlling_agencyINVERTED VENT CHECK VALVE, 3" FLANGED
NSN4820-01-535-8888
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3-1750FBC · 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
•
FLOW CONTROL DEVICE: BALL
•
FURNISHED ITEMS AND QUANTITY: 1 COVER AND 1 FLOAT AND 1 FILTER SCREEN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
VALVE SIZE: 3.000 INCHES IN
•
MATERIAL: COPPER ALLOY BODY
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEBALL
FURNISHED ITEMS AND QUANTITY1 COVER AND 1 FLOAT AND 1 FILTER SCREEN
CONNECTION TYPEFLANGE ALL ENDS
VALVE SIZE3.000 INCHES IN
PART NAME ASSIGNED BY CONTROLLING AGENCYINVERTED VENT CHECK VALVE, 3" FLANGED
END ITEM IDENTIFICATIONVENT-FLAME ARRESTOR
MATERIALCOPPER ALLOY BODY
MATERIALCOPPER FLOW CONTROL DEVICE
VALVE OPERATION METHODAUTOMATIC
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

No substitute or cross-reference records for this part.

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 3-1750FBC?
3-1750FBC is a VALVE,VENT-CHECK.
What is the NSN for 3-1750FBC?
3-1750FBC is cataloged in the U.S. Government catalog under NSN 4820-01-535-8888. 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.