PartsTable
Technical Data Sheet
50991-01 ✓ 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

VALVE,REGULATING,FLUID PRESSURE. Key specifications include filter: NOT INCLUDED, material: STEEL CORROSION RESISTING SEAT, regulation_type: AUTOMATIC SINGLE STAGE, special_features: ALL END CONNECTIONS LOCATED IN BOTTOM OF VALVE, mounting_facility: BRACKET, surface_treatment: PAINT OUTSIDE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-045-3811, 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
50991-01
NSN: 4820-01-045-3811
FSC: 4820
CAGE: 24658 — GENERAL REGULATOR CORP. DBA ACCUDRIV (USA)
SPECIFICATIONS
filterNOT INCLUDED
materialSTEEL CORROSION RESISTING SEAT
regulation_typeAUTOMATIC SINGLE STAGE
special_featuresALL END CONNECTIONS LOCATED IN BOTTOM OF VALVE
mounting_facilityBRACKET
surface_treatmentPAINT OUTSIDE
flow_control_deviceDISK, TOP GUIDED
valve_loading_methodDOME
end_connection_quantity3
first_end_connection_typeTHREADED INTERNAL PIPE
first_end_style_designatorPLAIN
first_end_thread_directionRIGHT-HAND
NSN4820-01-045-3811
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 50991-01 · 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
REGULATION TYPE: AUTOMATIC SINGLE STAGE
MATERIAL: STEEL CORROSION RESISTING SEAT
SURFACE TREATMENT: PAINT OUTSIDE
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.125-27 NPT FIRST END
FIRST END STYLE DESIGNATOR: PLAIN
FIRST END CONNECTION TYPE: THREADED INTERNAL PIPE
TECHNICAL CHARACTERISTICS (FLIS)
REGULATION TYPEAUTOMATIC SINGLE STAGE
SPECIAL FEATURESALL END CONNECTIONS LOCATED IN BOTTOM OF VALVE
MATERIALSTEEL CORROSION RESISTING SEAT
SURFACE TREATMENTPAINT OUTSIDE
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.125-27 NPT FIRST END
FIRST END STYLE DESIGNATORPLAIN
FIRST END CONNECTION TYPETHREADED INTERNAL PIPE
VALVE LOADING METHODDOME
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
909150-00Interchangeable
interchangeable cross-reference
interchangeable
15146PInterchangeable
interchangeable cross-reference
interchangeable
509-0091Interchangeable
interchangeable cross-reference
interchangeable
509-91Interchangeable
interchangeable cross-reference
interchangeable
10070Interchangeable
interchangeable cross-reference
interchangeable
5609Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 50991-01?
50991-01 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace 50991-01?
There are 24 known substitutes for 50991-01: 909150-00, 15146P, 509-0091 and 21 more. Substitute compatibility should be verified for your specific system.
Is 50991-01 still available?
50991-01 is currently cancelled.
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