PartsTable
Technical Data Sheet
01977-0105 ✓ 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 material: COPPER ALLOY SEAT, bonnet_type: INSIDE SCREW, connection_type: THREADED EXTERNAL PIPE SECOND END, connection_style: PLAIN,OPTIONAL END(PIPE) FIRST END, style_designator: ANGLE, thread_direction: RIGHT-HAND FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-273-9888, 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
01977-0105
NSN: 4820-00-273-9888
FSC: 4820
CAGE: 71342 — IMI CASH VALVE INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY SEAT
bonnet_typeINSIDE SCREW
connection_typeTHREADED EXTERNAL PIPE SECOND END
connection_stylePLAIN,OPTIONAL END(PIPE) FIRST END
style_designatorANGLE
thread_directionRIGHT-HAND FIRST END
features_providedVALVE STEM LOCK SHIELD AND PRESSURE TIGHT OUTLET SIDE
disk_loading_methodSPRING
flow_control_deviceBALL
nominal_thread_size0.750 INCHES SECOND END IN
valve_operation_methodAUTOMATIC
bonnet_attachment_methodTHREADED
NSN4820-00-273-9888
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 01977-0105 · 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
CONNECTION STYLE: PLAIN (PIPE) SECOND END
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST END
MATERIAL: COPPER ALLOY BODY
THREAD SERIES DESIGNATOR: NPT FIRST END
BONNET TYPE: INSIDE SCREW
DISK LOADING METHOD: SPRING
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEPLAIN (PIPE) SECOND END
CONNECTION TYPETHREADED INTERNAL PIPE FIRST END
MATERIALCOPPER ALLOY BODY
THREAD SERIES DESIGNATORNPT FIRST END
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) FIRST END
MATERIALCOPPER ALLOY SEAT
BONNET TYPEINSIDE SCREW
DISK LOADING METHODSPRING
STYLE DESIGNATORANGLE
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
100-4Interchangeable
interchangeable cross-reference
interchangeable
MC6VACInterchangeable
interchangeable cross-reference
interchangeable
MCInterchangeable
interchangeable cross-reference
interchangeable
474403PG925PC24Interchangeable
interchangeable cross-reference
interchangeable
145625Interchangeable
interchangeable cross-reference
interchangeable
733492Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 01977-0105?
01977-0105 is a VALVE,SAFETY RELIEF.
What parts can replace 01977-0105?
There are 19 known substitutes for 01977-0105: 100-4, MC6VAC, MC and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 01977-0105?
01977-0105 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-273-9888. This indicates validated use in U.S. government and defense supply chains.
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