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Technical Data Sheet
PartsTable / COMPONENT / 6478N 1 1/8IN
6478N 1 1/8IN ✓ 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 6478N 1 1/8IN 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 4820-00-277-1715, 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
6478N 1 1/8IN
NSN: 4820-00-277-1715
FSC: 4820
CAGE: 28193 — HENRY TECHNOLOGIES, INC. (USA)
SPECIFICATIONS
Part Number6478N 1 1/8IN
NSN4820-00-277-1715
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6478N 1 1/8IN · 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
•
VALVE OPERATION METHOD: MANUAL
•
MATERIAL: COPPER ALLOY SEAT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626,ALLOY 37 FED SPEC SINGLE MATERIAL RESPONSE BODY
•
STYLE DESIGNATOR: ANGLE
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.125 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
NONDEFINITIVE SPEC/STD DATA: III TYPE AND 1 CLASS
TECHNICAL CHARACTERISTICS (FLIS)
VALVE OPERATION METHODMANUAL
MATERIALCOPPER ALLOY SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626,ALLOY 37 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALCOPPER ALLOY 377 BODY
STYLE DESIGNATORANGLE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.125 INCHES ALL ENDS IN
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
NONDEFINITIVE SPEC/STD DATAIII TYPE AND 1 CLASS
BONNET ATTACHMENT METHODINTEGRAL
MAXIMUM OPERATING TEMP275.0 FAHRENHEIT SINGLE RESPONSE DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
6478Interchangeable
interchangeable cross-reference
interchangeable
3B90068-105Interchangeable
interchangeable cross-reference
interchangeable
093690Interchangeable
interchangeable cross-reference
interchangeable
93690Interchangeable
interchangeable cross-reference
interchangeable
7351330Interchangeable
interchangeable cross-reference
interchangeable
L6B1547-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6478N 1 1/8IN?
6478N 1 1/8IN is a 6478N 1 1/8IN.
What parts can replace 6478N 1 1/8IN?
There are 25 known substitutes for 6478N 1 1/8IN: 6478, 3B90068-105, 093690 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6478N 1 1/8IN?
6478N 1 1/8IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-277-1715. 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