537A-4D-12 — VALVE,SAFETY RELIEF

✓ Government record, cited

— · GATE VALVE

PRODUCT OVERVIEW

537A-4D-12: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, thread_class: 3A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: GASKET SEAL (TUBE) FIRST END, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-147-4951, 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

537A-4D-12

NSN: 4820-01-147-4951
FSC: 4820 — Valves, Nonpowered
CAGE: 91816 — CIRCOR AEROSPACE, INC. DBA CIRCOR AEROSPACE INC (USA)

SPECIFICATIONS

material	ALUMINUM ALLOY 2024 OVERALL
thread_class	3A FIRST END A
connection_type	THREADED EXTERNAL TUBE FIRST END
connection_style	GASKET SEAL (TUBE) FIRST END
style_designator	STRAIGHT THRU
thread_direction	RIGHT-HAND FIRST END
surface_treatment	ANODIZE LOCATION NOT OTHERWISE SPECIFIED
operating_pressure	200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_method	SPRING
flow_control_device	POPPET
nominal_thread_size	0.438 INCHES FIRST END IN
maximum_operating_temp	250.0 FAHRENHEIT SINGLE RESPONSE DEGF
NSN	4820-01-147-4951

COMPONENT DIAGRAM

KEY FEATURES

•

FLOW CONTROL DEVICE: POPPET

•

CONNECTION STYLE: GASKET SEAL (TUBE) FIRST END

•

CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END

•

STYLE DESIGNATOR: STRAIGHT THRU

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL

•

OPERATING PRESSURE: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS

•

THREAD DIRECTION: RIGHT-HAND FIRST END

•

NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN

TECHNICAL CHARACTERISTICS

FLOW CONTROL DEVICE	POPPET
CONNECTION STYLE	GASKET SEAL (TUBE) FIRST END
CONNECTION TYPE	THREADED EXTERNAL TUBE FIRST END
STYLE DESIGNATOR	STRAIGHT THRU
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OPERATING PRESSURE	200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD DIRECTION	RIGHT-HAND FIRST END
NOMINAL THREAD SIZE	0.438 INCHES FIRST END IN
MAXIMUM OPERATING TEMP	250.0 FAHRENHEIT SINGLE RESPONSE DEGF
DISK LOADING METHOD	SPRING

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 2

GV500HW4A12-37Reference document

Same NSN cross-reference

Reference document — Secondary reference

GV500HW4A12-77Same 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 537A-4D-12?

537A-4D-12 is a VALVE,SAFETY RELIEF.

What parts can replace 537A-4D-12?

There are 2 known substitutes for 537A-4D-12: GV500HW4A12-37, GV500HW4A12-77. Substitute compatibility should be verified for your specific system.

What is the NSN for 537A-4D-12?

537A-4D-12 is cataloged in the U.S. Government catalog under NSN 4820-01-147-4951. This indicates validated use in U.S. government and defense supply chains.

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