647B-1-1/8-28 — VALVE,SAFETY RELIEF

✓ Government record, cited

— · GATE VALVE

PRODUCT OVERVIEW

647B-1-1/8-28: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM SEAT, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: ANGLE, thread_direction: RIGHT-HAND ALL ENDS, flow_control_device: POPPET. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-447-9211, 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

647B-1-1/8-28

NSN: 4820-01-447-9211
FSC: 4820 — Valves, Nonpowered
CAGE: 09990 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV HYDRAULIC VALVE DIVISION (USA)

SPECIFICATIONS

material	RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM SEAT
connection_type	THREADED EXTERNAL PIPE ALL ENDS
connection_style	PLAIN (PIPE) ALL ENDS
style_designator	ANGLE
thread_direction	RIGHT-HAND ALL ENDS
flow_control_device	POPPET
nominal_thread_size	0.125 INCHES ALL ENDS IN
valve_operation_method	AUTOMATIC
end_item_identification	STRATEGIC SEALIFT CONVERSION SHIPS CLASS
opening_pressure_setting	8.0 POUNDS PER SQUARE INCH LBS
thread_series_designator	ANPT ALL ENDS
material_document_and_classification	MIL-R-25897 CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE SEAT
NSN	4820-01-447-9211

COMPONENT DIAGRAM

KEY FEATURES

•

FLOW CONTROL DEVICE: POPPET

•

CONNECTION STYLE: PLAIN (PIPE) ALL ENDS

•

CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS

•

STYLE DESIGNATOR: ANGLE

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-25897 CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE SEAT

•

THREAD DIRECTION: RIGHT-HAND ALL ENDS

•

NOMINAL THREAD SIZE: 0.125 INCHES ALL ENDS IN

TECHNICAL CHARACTERISTICS

FLOW CONTROL DEVICE	POPPET
CONNECTION STYLE	PLAIN (PIPE) ALL ENDS
CONNECTION TYPE	THREADED EXTERNAL PIPE ALL ENDS
STYLE DESIGNATOR	ANGLE
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-R-25897 CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE SEAT
THREAD DIRECTION	RIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE	0.125 INCHES ALL ENDS IN
END ITEM IDENTIFICATION	STRATEGIC SEALIFT CONVERSION SHIPS CLASS
MATERIAL	STEEL COMP 303 BODY
MATERIAL	RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM SEAT

SUBSTITUTES & CROSS-REFERENCES 3

4820PL1792809Reference document

Same NSN cross-reference

Reference document — Informative reference only

3150143-2Reference document

Same NSN cross-reference

Reference document — Secondary reference

3150143Reference document

Same NSN cross-reference

Reference document — Vendor item drawing 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 647B-1-1/8-28?

647B-1-1/8-28 is a VALVE,SAFETY RELIEF.

What parts can replace 647B-1-1/8-28?

There are 3 known substitutes for 647B-1-1/8-28: 4820PL1792809, 3150143-2, 3150143. Substitute compatibility should be verified for your specific system.

What is the NSN for 647B-1-1/8-28?

647B-1-1/8-28 is cataloged in the U.S. Government catalog under NSN 4820-01-447-9211. This indicates validated use in U.S. government and defense supply chains.

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