PartsTable
Technical Data Sheet
A51H9190-1 ✓ 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 seat_angle: 37.0 DEGREES SECOND END18.0 DEGREES FIRST END, thread_class: 3A FIRST END3A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END, connection_style: FLARELESS (TUBE) FIRST ENDFLARELESS (TUBE) FIRST END, thread_direction: RIGHT-HAND FIRST ENDRIGHT-HAND FIRST END, features_provided: VALVE STEM LOCK SHIELD AND VALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDEPRESSURE TIGHT OUTLET SIDE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-328-8180, 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
A51H9190-1
NSN: 4820-00-328-8180
FSC: 4820
CAGE: 61174 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES SECOND END18.0 DEGREES FIRST END
thread_class3A FIRST END3A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARELESS (TUBE) FIRST ENDFLARELESS (TUBE) FIRST END
thread_directionRIGHT-HAND FIRST ENDRIGHT-HAND FIRST END
features_providedVALVE STEM LOCK SHIELD AND VALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDEPRESSURE TIGHT OUTLET SIDE
surface_treatmentPAINT LOCATION NOT OTHERWISE SPECIFIED
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRINGSPRING
flow_control_devicePOPPETPOPPET
nominal_thread_size0.562 INCHES SECOND END0.562 INCHES SECOND END IN
valve_operation_methodAUTOMATICAUTOMATIC
NSN4820-00-328-8180
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: A51H9190-1 · 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
MEDIA FOR WHICH DESIGNED: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
THREAD CLASS: 3B SECOND END3B SECOND END
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES SECOND END IN
NOMINAL THREAD SIZE: 0.562 INCHES FIRST END0.562 INCHES FIRST END IN
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VALVE DISCHARGE FLOW RATE: 2.0 GALLONS PER MINUTE2.0 GALLONS PER MINUTE
TECHNICAL CHARACTERISTICS (FLIS)
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON SINGLE RESPONSE
THREAD CLASS3B SECOND END3B SECOND END
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES SECOND END IN
NOMINAL THREAD SIZE0.562 INCHES FIRST END0.562 INCHES FIRST END IN
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD CLASS3A FIRST END3A FIRST END A
VALVE DISCHARGE FLOW RATE2.0 GALLONS PER MINUTE2.0 GALLONS PER MINUTE
DISK LOADING METHODSPRINGSPRING
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES SECOND END0.375 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
E59-0001-005Interchangeable
interchangeable cross-reference
interchangeable
6302Interchangeable
interchangeable cross-reference
interchangeable
51210Interchangeable
interchangeable cross-reference
interchangeable
675137Interchangeable
interchangeable cross-reference
interchangeable
PC430000001-1Interchangeable
interchangeable cross-reference
interchangeable
8812-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A51H9190-1?
A51H9190-1 is a VALVE,SAFETY RELIEF.
What parts can replace A51H9190-1?
There are 13 known substitutes for A51H9190-1: E59-0001-005, 6302, 51210 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A51H9190-1?
A51H9190-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-328-8180. This indicates validated use in U.S. government and defense supply chains.
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