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Technical Data Sheet
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51741-1 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

51741-1: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 4820-00-433-3672, 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
51741-1
NSN: 4820-00-433-3672
NIINs: 004333672, 014451643
FSC: 4820 — Valves, Nonpowered
CAGE: 45681 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV CORPORATE HEADQUARTERS (USA)
SPECIFICATIONS
Part Number51741-1
NSN4820-00-433-3672
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 51741-1 · 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
SUBSTITUTES & CROSS-REFERENCES 2
6-1145-75Reference document
Same NSN cross-reference
Reference document — Secondary reference
667145Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 51741-1?
51741-1 is a VALVE,CHECK.
What parts can replace 51741-1?
There are 2 known substitutes for 51741-1: 6-1145-75, 667145. Substitute compatibility should be verified for your specific system.
What is the NSN for 51741-1?
51741-1 is cataloged in the U.S. Government catalog under NSN 4820-00-433-3672. This indicates validated use in U.S. government and defense supply chains.
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