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603-1056 — VALVE,PILOT OPERATED RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

603-1056: VALVE,PILOT OPERATED RELIEF.

The VALVE,PILOT OPERATED RELIEF is a the manufacturer industrial component. Key specifications include end_item_identification: EATON CORP HYDRAULIC SYSTEMS COMPONENTS TEST STAND TYPE MK-3A A. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-070-4582, 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
603-1056
NSN: 4820-01-070-4582
FSC: 4820 — Valves, Nonpowered
CAGE: 99185 — EATON CORPORATION DBA AIRFLEX DIV DIV AIRFLEX (USA)
SPECIFICATIONS
end_item_identificationEATON CORP HYDRAULIC SYSTEMS COMPONENTS TEST STAND TYPE MK-3A A
NSN4820-01-070-4582
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 603-1056 · 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
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONEATON CORP HYDRAULIC SYSTEMS COMPONENTS TEST STAND TYPE MK-3A A
SUBSTITUTES & CROSS-REFERENCES 2
36Q246D1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
R1335-551Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 603-1056?
603-1056 is a VALVE,PILOT OPERATED RELIEF.
What parts can replace 603-1056?
There are 2 known substitutes for 603-1056: 36Q246D1, R1335-551. Substitute compatibility should be verified for your specific system.
What is the NSN for 603-1056?
603-1056 is cataloged in the U.S. Government catalog under NSN 4820-01-070-4582. This indicates validated use in U.S. government and defense supply chains.
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