PartsTable
Technical Data Sheet
9521 AND ML185 ✓ Verified by PartsTable
· GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) FIRST END, style_designator: ANGLE, thread_direction: RIGHT-HAND ALL ENDS, operating_pressure: 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-052-3975, 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
9521 AND ML185
NSN: 4820-01-052-3975
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) FIRST END
style_designatorANGLE
thread_directionRIGHT-HAND ALL ENDS
operating_pressure50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
flow_control_deviceDISK
nominal_thread_size0.500 INCHES SECOND END IN
valve_operation_methodAUTOMATIC
end_item_identificationLOS ANGELES CLASS SSN(688)
media_for_which_designedAIR SINGLE RESPONSE
thread_series_designatorNPT ALL ENDS
NSN4820-01-052-3975
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 9521 AND ML185 · 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
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY
THREAD DIRECTION: RIGHT-HAND ALL ENDS
CONNECTION STYLE: PLAIN (PIPE) FIRST END
MEDIA FOR WHICH DESIGNED: AIR SINGLE RESPONSE
OPERATING PRESSURE: 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD SERIES DESIGNATOR: NPT ALL ENDS
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,ALLOY D4/D/ FED SPEC SINGLE MATERIAL RESPONSE BODY
THREAD DIRECTIONRIGHT-HAND ALL ENDS
CONNECTION STYLEPLAIN (PIPE) FIRST END
END ITEM IDENTIFICATIONLOS ANGELES CLASS SSN(688)
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
OPERATING PRESSURE50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
FLOW CONTROL DEVICEDISK
NOMINAL THREAD SIZE0.500 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
200137Interchangeable
interchangeable cross-reference
interchangeable
5171097Interchangeable
interchangeable cross-reference
interchangeable
13337Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-751Interchangeable
interchangeable cross-reference
interchangeable
44107Interchangeable
interchangeable cross-reference
interchangeable
D42UU-09H-1/2-3/4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9521 AND ML185?
9521 AND ML185 is a VALVE,SAFETY RELIEF.
What parts can replace 9521 AND ML185?
There are 17 known substitutes for 9521 AND ML185: 200137, 5171097, 13337 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9521 AND ML185?
9521 AND ML185 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-052-3975. This indicates validated use in U.S. government and defense supply chains.
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