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174A-1IN-75PSI — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

174A-1IN-75PSI: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, bonnet_type: INSIDE SCREW, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, style_designator: ANGLE, thread_direction: RIGHT-HAND ALL ENDS, features_provided: VALVE STEM LOCK SHIELD. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-057-7231, 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
174A-1IN-75PSI
NSN: 4820-00-057-7231
FSC: 4820 — Valves, Nonpowered
CAGE: 79227 — WATTS REGULATOR COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
bonnet_typeINSIDE SCREW
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
style_designatorANGLE
thread_directionRIGHT-HAND ALL ENDS
features_providedVALVE STEM LOCK SHIELD
disk_loading_methodSPRING
flow_control_deviceDISK
nominal_thread_size1.000 INCHES ALL ENDS IN
valve_operation_methodMANUAL
bonnet_attachment_methodTHREADED
opening_pressure_setting75.0 POUNDS PER SQUARE INCH LBS
NSN4820-00-057-7231
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 174A-1IN-75PSI · 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
•
FLOW CONTROL DEVICE: DISK
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
•
CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) ALL ENDS
•
STYLE DESIGNATOR: ANGLE
•
FEATURES PROVIDED: VALVE STEM LOCK SHIELD
•
BONNET TYPE: INSIDE SCREW
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
NOMINAL THREAD SIZE: 1.000 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
NOMINAL PIPE SIZE ACCOMMODATED1.000 INCHES ALL ENDS IN
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) ALL ENDS
STYLE DESIGNATORANGLE
FEATURES PROVIDEDVALVE STEM LOCK SHIELD
BONNET TYPEINSIDE SCREW
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE1.000 INCHES ALL ENDS IN
DISK LOADING METHODSPRING
BONNET ATTACHMENT METHODTHREADED
SUBSTITUTES & CROSS-REFERENCES 1
174AReference document
Same NSN cross-reference
Reference document — Design control — primary 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 174A-1IN-75PSI?
174A-1IN-75PSI is a VALVE,SAFETY RELIEF.
What parts can replace 174A-1IN-75PSI?
There is 1 known substitute for 174A-1IN-75PSI: 174A. Substitute compatibility should be verified for your specific system.
What is the NSN for 174A-1IN-75PSI?
174A-1IN-75PSI is cataloged in the U.S. Government catalog under NSN 4820-00-057-7231. 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.