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3978-5-33-0 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3978-5-33-0: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, thread_class: 3A FIRST END A, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND FIRST END, flow_control_device: DISK. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-005-4964, 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
3978-5-33-0
NSN: 4820-00-005-4964
FSC: 4820 — Valves, Nonpowered
CAGE: 22501 — HOWELL LABORATORIES INC DBA HOWELL LABORATORIES INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
thread_class3A FIRST END A
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND FIRST END
flow_control_deviceDISK
nominal_thread_size0.562 INCHES FIRST END IN
valve_operation_methodAUTOMATIC
opening_pressure_setting33.0 POUNDS PER SQUARE INCH LBS
thread_series_designatorUNF FIRST END
adjustable_pressure_range+25.0 TO 75.0 POUNDS PER SQUARE INCH LBS
NSN4820-00-005-4964
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3978-5-33-0 · 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
•
FLOW CONTROL DEVICE: DISK
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
•
STYLE DESIGNATOR: STRAIGHT THRU
•
ADJUSTABLE PRESSURE RANGE: +25.0 TO 75.0 POUNDS PER SQUARE INCH LBS
•
THREAD DIRECTION: RIGHT-HAND FIRST END
•
NOMINAL THREAD SIZE: 0.562 INCHES FIRST END IN
•
THREAD CLASS: 3A FIRST END A
•
MATERIAL: ALUMINUM ALLOY OVERALL
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
STYLE DESIGNATORSTRAIGHT THRU
ADJUSTABLE PRESSURE RANGE+25.0 TO 75.0 POUNDS PER SQUARE INCH LBS
THREAD DIRECTIONRIGHT-HAND FIRST END
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
THREAD CLASS3A FIRST END A
MATERIALALUMINUM ALLOY OVERALL
THREAD SERIES DESIGNATORUNF FIRST END
OPENING PRESSURE SETTING33.0 POUNDS PER SQUARE INCH LBS
SUBSTITUTES & CROSS-REFERENCES 1
3978-5Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 3978-5-33-0?
3978-5-33-0 is a VALVE,SAFETY RELIEF.
What parts can replace 3978-5-33-0?
There is 1 known substitute for 3978-5-33-0: 3978-5. Substitute compatibility should be verified for your specific system.
What is the NSN for 3978-5-33-0?
3978-5-33-0 is cataloged in the U.S. Government catalog under NSN 4820-00-005-4964. This indicates validated use in U.S. government and defense supply chains.
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