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Technical Data Sheet
PartsTable / COMPONENT / 3978-01
3978-01 ✓ 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,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include color: GREEN LENS, material: PLASTIC POLYCARBONATE, body_width: 8.125 INCHES NOMINAL IN, body_height: 1.500 INCHES NOMINAL IN, body_length: 7.812 INCHES NOMINAL IN, thread_class: 3A FIRST END A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-524-6746, 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
3978-01
NSN: 4820-01-524-6746
FSC: 4820
CAGE: 22501 — HOWELL LABORATORIES INC DBA HOWELL LABORATORIES INC (USA)
SPECIFICATIONS
colorGREEN LENS
materialPLASTIC POLYCARBONATE
body_width8.125 INCHES NOMINAL IN
body_height1.500 INCHES NOMINAL IN
body_length7.812 INCHES NOMINAL IN
thread_class3A FIRST END A
rating_methodELECTRICAL SINGLE COMPONENT SINGLE WINDING
inclosure_typeOPEN
overall_length0.800 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST END
inductance_typeFIXED
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
NSN4820-01-524-6746
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3978-01 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
MILE1-988Interchangeable
interchangeable cross-reference
interchangeable
7615Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-1/988Interchangeable
interchangeable cross-reference
interchangeable
609879-22Interchangeable
interchangeable cross-reference
interchangeable
6315ZInterchangeable
interchangeable cross-reference
interchangeable
FFB171/05J15B2EInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3978-01?
3978-01 is a VALVE,SAFETY RELIEF.
What parts can replace 3978-01?
There are 20 known substitutes for 3978-01: MILE1-988, 7615, MIL-PRF-1/988 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3978-01?
3978-01 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-524-6746. 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