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8-139FB-S ITEM 3 — Technical Data Sheet

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— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The BALL,CHECK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, spherical_diameter: 9.000 INCHES NOMINAL IN, end_item_identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS, valve_design_control_activity: 79128, valve_size_for_which_designed: 8.000 INCHES IN, valve_model_number_for_which_designed: 8-1398FB-S. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-01-420-2149, 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
8-139FB-S ITEM 3
NSN: 4820-01-420-2149
FSC: 4820
CAGE: 79128 — ROBERT H WAGER CO INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
spherical_diameter9.000 INCHES NOMINAL IN
end_item_identificationSTRATEGIC SEALIFT CONVERSION SHIPS CLASS
valve_design_control_activity79128
valve_size_for_which_designed8.000 INCHES IN
valve_model_number_for_which_designed8-1398FB-S
part_name_assigned_by_controlling_agencyFLOAT
NSN4820-01-420-2149
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8-139FB-S ITEM 3 · 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
•
MATERIAL: COPPER ALLOY
•
SPHERICAL DIAMETER: 9.000 INCHES NOMINAL IN
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: 8-1398FB-S
•
VALVE DESIGN CONTROL ACTIVITY: 79128
•
VALVE SIZE FOR WHICH DESIGNED: 8.000 INCHES IN
TECHNICAL CHARACTERISTICS
MATERIALCOPPER ALLOY
SPHERICAL DIAMETER9.000 INCHES NOMINAL IN
END ITEM IDENTIFICATIONSTRATEGIC SEALIFT CONVERSION SHIPS CLASS
VALVE MODEL NUMBER FOR WHICH DESIGNED8-1398FB-S
VALVE DESIGN CONTROL ACTIVITY79128
PART NAME ASSIGNED BY CONTROLLING AGENCYFLOAT
VALVE SIZE FOR WHICH DESIGNED8.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
11B5090424InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
52-472-003InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4CInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8-1398FB-S ITEM 3InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8-139FB-S ITEM 3?
8-139FB-S ITEM 3 is a BALL,CHECK.
What parts can replace 8-139FB-S ITEM 3?
There are 4 known substitutes for 8-139FB-S ITEM 3: 11B5090424, 52-472-003, 4C and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8-139FB-S ITEM 3?
8-139FB-S ITEM 3 is cataloged in the Federal Logistics Information System under NSN 4820-01-420-2149. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026