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74-830155-347 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

74-830155-347: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include style_designator: STRAIGHT THRU, valve_operation_method: AUTOMATIC, media_for_which_designed: WATER, FRESH SINGLE RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-474-5558, 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
74-830155-347
NSN: 4820-01-474-5558
FSC: 4820 — Valves, Nonpowered
CAGE: 76823 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN IS DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS (USA)
SPECIFICATIONS
style_designatorSTRAIGHT THRU
valve_operation_methodAUTOMATIC
media_for_which_designedWATER, FRESH SINGLE RESPONSE
NSN4820-01-474-5558
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 74-830155-347 · 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
•
STYLE DESIGNATOR: STRAIGHT THRU
•
MEDIA FOR WHICH DESIGNED: WATER, FRESH SINGLE RESPONSE
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSTRAIGHT THRU
MEDIA FOR WHICH DESIGNEDWATER, FRESH SINGLE RESPONSE
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 2
821340Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
821340-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 74-830155-347?
74-830155-347 is a VALVE,SAFETY RELIEF.
What parts can replace 74-830155-347?
There are 2 known substitutes for 74-830155-347: 821340, 821340-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 74-830155-347?
74-830155-347 is cataloged in the U.S. Government catalog under NSN 4820-01-474-5558. 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.