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4938B — VALVE,REGULATING,FLUID PRESSURE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

4938B: VALVE,REGULATING,FLUID PRESSURE.

VALVE,REGULATING,FLUID PRESSURE. Key specifications include material: COPPER ALLOY BODY, temp_rating: -40.0 CELSIUS MINIMUM AND 180.0 CELSIUS MAXIMUM DEGC, special_features: PRESSURE RATING - 300.0 PSI; PURGED, renewable_seat_ring_type: ANY ACCEPTABLE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-288-0800, 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
4938B
NSN: 4820-01-288-0800
FSC: 4820 — Valves, Nonpowered
CAGE: 22501 — HOWELL LABORATORIES INC DBA HOWELL LABORATORIES INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
temp_rating-40.0 CELSIUS MINIMUM AND 180.0 CELSIUS MAXIMUM DEGC
special_featuresPRESSURE RATING - 300.0 PSI; PURGED
renewable_seat_ring_typeANY ACCEPTABLE
NSN4820-01-288-0800
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 4938B · 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
•
RENEWABLE SEAT RING TYPE: ANY ACCEPTABLE
•
TEMP RATING: -40.0 CELSIUS MINIMUM AND 180.0 CELSIUS MAXIMUM DEGC
•
MATERIAL: COPPER ALLOY BODY
TECHNICAL CHARACTERISTICS
RENEWABLE SEAT RING TYPEANY ACCEPTABLE
TEMP RATING-40.0 CELSIUS MINIMUM AND 180.0 CELSIUS MAXIMUM DEGC
SPECIAL FEATURESPRESSURE RATING - 300.0 PSI; PURGED
MATERIALCOPPER ALLOY BODY
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4938B?
4938B is a VALVE,REGULATING,FLUID PRESSURE.
What is the NSN for 4938B?
4938B is cataloged in the U.S. Government catalog under NSN 4820-01-288-0800. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.