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12500124-3 — VALVE ASSEMBLY,PRESSURE REGULATI

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

12500124-3: VALVE ASSEMBLY,PRESSURE REGULATI.

VALVE ASSEMBLY,PRESSURE REGULATI. Key specifications include end_item_identification: MAIN PROPULSION DIESEL ENGINES,ALCO MODEL 251 ONBOARD 270 FT COAST GUARD VESSELS FT. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-309-9828, 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
12500124-3
NSN: 4820-01-309-9828
FSC: 4820 — Valves, Nonpowered
CAGE: 50024 — COLTEC INDUSTRIES INC DBA FAIRBANKS MORSE ENGINE FM/ALCO (USA)
SPECIFICATIONS
end_item_identificationMAIN PROPULSION DIESEL ENGINES,ALCO MODEL 251 ONBOARD 270 FT COAST GUARD VESSELS FT
NSN4820-01-309-9828
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 12500124-3 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CONSISTS OF 1 EA. BACK PRESSURE REGULATOR AND 1 EA. PRESSURE PILOT VALVE; PRESSURE RANGE 5 TO 125 P.S.I.G; REGULATOR CONNECTION SIZE 2 IN. NPT; PILOT VALVE CONNECTION SIZE 1/4 IN. NPT; O/A HEIGHT 11.440 IN.; O/A WIDTH 10.880 IN. IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCONSISTS OF 1 EA. BACK PRESSURE REGULATOR AND 1 EA. PRESSURE PILOT VALVE; PRESSURE RANGE 5 TO 125 P.S.I.G; REGULATOR CONNECTION SIZE 2 IN. NPT; PILOT VALVE CONNECTION SIZE 1/4 IN. NPT; O/A HEIGHT 11.440 IN.; O/A WIDTH 10.880 IN. IN
END ITEM IDENTIFICATIONMAIN PROPULSION DIESEL ENGINES,ALCO MODEL 251 ONBOARD 270 FT COAST GUARD VESSELS FT
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
2280042Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 12500124-3?
12500124-3 is a VALVE ASSEMBLY,PRESSURE REGULATI.
What parts can replace 12500124-3?
There is 1 known substitute for 12500124-3: 2280042. Substitute compatibility should be verified for your specific system.
What is the NSN for 12500124-3?
12500124-3 is cataloged in the U.S. Government catalog under NSN 4820-01-309-9828. 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.