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7878-7-Y — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

7878-7-Y: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL, temp_rating: 500.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3A A, overall_height: 1.969 INCHES NOMINAL IN, inside_diameter: 2.125 INCHES NOMINAL IN, outside_diameter: 4.813 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-187-1467, 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
7878-7-Y
NSN: 4820-01-187-1467
FSC: 4820 — Valves, Nonpowered
CAGE: 63686 — THE WALWORTH COMPANY (USA)
SPECIFICATIONS
materialSTEEL
temp_rating500.0 FAHRENHEIT MAXIMUM DEGF
thread_class3A A
overall_height1.969 INCHES NOMINAL IN
inside_diameter2.125 INCHES NOMINAL IN
outside_diameter4.813 INCHES NOMINAL IN
nominal_thread_size1.750 INCHES IN
thread_quantity_per_inch12
thread_series_designatorUNS
NSN4820-01-187-1467
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 7878-7-Y · 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
•
TEMP RATING: 500.0 FAHRENHEIT MAXIMUM DEGF
•
OUTSIDE DIAMETER: 4.813 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 1.750 INCHES IN
•
INSIDE DIAMETER: 2.125 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
THREAD QUANTITY PER INCH: 12
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.969 INCHES NOMINAL IN
TEMP RATING500.0 FAHRENHEIT MAXIMUM DEGF
OUTSIDE DIAMETER4.813 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.750 INCHES IN
INSIDE DIAMETER2.125 INCHES NOMINAL IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH12
MATERIALSTEEL
THREAD SERIES DESIGNATORUNS
SUBSTITUTES & CROSS-REFERENCES 5
845-1889553Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2620-922X2Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
N-1126 PIECE 32 5INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
N-11264Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
845-1889553 PIECE 32 5INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 7878-7-Y?
7878-7-Y is a DISK,VALVE.
What parts can replace 7878-7-Y?
There are 5 known substitutes for 7878-7-Y: 845-1889553, 2620-922X2, N-1126 PIECE 32 5IN and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7878-7-Y?
7878-7-Y is cataloged in the U.S. Government catalog under NSN 4820-01-187-1467. 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.