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2591-803 ✓ 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,STOP-CHECK is a the manufacturer industrial component. Key specifications include special_features: VALVE SIZE 0.500 IN.; NORMALLY CLOSED IN, flow_control_device: DISK, valve_operation_method: AUTOMATIC, end_item_identification: MDL H 750 D PQ; SERIAL NR. 484574, media_for_which_designed: OIL, HYDRAULIC SINGLE RESPONSE.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-311-7991, 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
2591-803
NSN: 4820-01-311-7991
FSC: 4820
CAGE: 52545 — I-T-E IMPERIAL CORP SUBSIDIARY OF GOULD INC AIRMATIC/BECKETT HARCUM DIV (USA)
SPECIFICATIONS
special_featuresVALVE SIZE 0.500 IN.; NORMALLY CLOSED IN
flow_control_deviceDISK
valve_operation_methodAUTOMATIC
end_item_identificationMDL H 750 D PQ; SERIAL NR. 484574
media_for_which_designedOIL, HYDRAULIC SINGLE RESPONSE
NSN4820-01-311-7991
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2591-803 · 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: OIL, HYDRAULIC SINGLE RESPONSE
•
VALVE OPERATION METHOD: AUTOMATIC
•
FLOW CONTROL DEVICE: DISK
TECHNICAL CHARACTERISTICS (FLIS)
MEDIA FOR WHICH DESIGNEDOIL, HYDRAULIC SINGLE RESPONSE
SPECIAL FEATURESVALVE SIZE 0.500 IN.; NORMALLY CLOSED IN
END ITEM IDENTIFICATIONMDL H 750 D PQ; SERIAL NR. 484574
VALVE OPERATION METHODAUTOMATIC
FLOW CONTROL DEVICEDISK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
15845NInterchangeable
interchangeable cross-reference
interchangeable
N474774175Interchangeable
interchangeable cross-reference
interchangeable
47477Interchangeable
interchangeable cross-reference
interchangeable
42477Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2591-803?
2591-803 is a VALVE,STOP-CHECK.
What parts can replace 2591-803?
There are 4 known substitutes for 2591-803: 15845N, N474774175, 47477 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2591-803?
2591-803 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-311-7991. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026