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Technical Data Sheet
PartsTable / COMPONENT / 590-3/8IN
590-3/8IN ✓ 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 590-3/8IN is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-446-3506, 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
590-3/8IN
NSN: 4820-00-446-3506
FSC: 4820
CAGE: 48422 — WILLIAM POWELL COMPANY, THE DBA POWELL VALVE DIV THE STARFLO CORPORATION (USA)
SPECIFICATIONS
Part Number590-3/8IN
NSN4820-00-446-3506
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 590-3/8IN · 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
•
DISK LOADING METHOD: WEIGHT
•
MOUNTING POSITION: HORIZONTAL
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
MEDIA FOR WHICH DESIGNED: STEAM FIRST RESPONSE
•
MATERIAL: COPPER ALLOY 922 SEAT
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE SEAT
•
OPERATING PRESSURE: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
•
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
DISK LOADING METHODWEIGHT
MOUNTING POSITIONHORIZONTAL
THREAD DIRECTIONRIGHT-HAND ALL ENDS
MEDIA FOR WHICH DESIGNEDSTEAM FIRST RESPONSE
MATERIALCOPPER ALLOY 922 SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B61 ASSN STD SINGLE MATERIAL RESPONSE SEAT
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
78018Interchangeable
interchangeable cross-reference
interchangeable
56069Interchangeable
interchangeable cross-reference
interchangeable
GGG-K-275Interchangeable
interchangeable cross-reference
interchangeable
5330PL1251347Interchangeable
interchangeable cross-reference
interchangeable
90414-2Interchangeable
interchangeable cross-reference
interchangeable
7801801IXInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 590-3/8IN?
590-3/8IN is a 590-3/8IN.
What parts can replace 590-3/8IN?
There are 17 known substitutes for 590-3/8IN: 78018, 56069, GGG-K-275 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 590-3/8IN?
590-3/8IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-446-3506. 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