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5550531 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

5550531: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 BODY, connection_type: THREADED EXTERNAL PIPE FIRST END, connection_style: PLAIN (PIPE) FIRST END, style_designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY., thread_direction: RIGHT-HAND ALL ENDS, flow_control_device: POPPET. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-302-1887, 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
5550531
NSN: 4820-01-302-1887
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 303 BODY
connection_typeTHREADED EXTERNAL PIPE FIRST END
connection_stylePLAIN (PIPE) FIRST END
style_designatorSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
thread_directionRIGHT-HAND ALL ENDS
flow_control_devicePOPPET
nominal_thread_size0.750 INCHES ALL ENDS IN
valve_operation_methodAUTOMATIC
media_for_which_designedAMMONIA, GASEOUS THIRD RESPONSE
opening_pressure_setting90.0 POUNDS PER SQUARE INCH LBS
thread_series_designatorNPT FIRST END
NSN4820-01-302-1887
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 5550531 · 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: POPPET
•
CONNECTION STYLE: PLAIN (PIPE) FIRST END
•
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
•
STYLE DESIGNATOR: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
MEDIA FOR WHICH DESIGNED: ACETYLENE SECOND RESPONSE
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEPOPPET
CONNECTION STYLEPLAIN (PIPE) FIRST END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
STYLE DESIGNATORSTRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
MEDIA FOR WHICH DESIGNEDACETYLENE SECOND RESPONSE
MEDIA FOR WHICH DESIGNEDHYDROGEN FIFTH RESPONSE
MEDIA FOR WHICH DESIGNEDAMMONIA, GASEOUS THIRD RESPONSE
MEDIA FOR WHICH DESIGNEDAIR FIRST RESPONSE
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 1
5550531-1Same 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 5550531?
5550531 is a VALVE,SAFETY RELIEF.
What parts can replace 5550531?
There is 1 known substitute for 5550531: 5550531-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 5550531?
5550531 is cataloged in the U.S. Government catalog under NSN 4820-01-302-1887. This indicates validated use in U.S. government and defense supply chains.
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