PartsTable
Technical Data Sheet
B-271 SHEET 1 ✓ 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,BUTTERFLY is a the manufacturer industrial component. Key specifications include material: IRON MALLEABLE BODY, valve_size: 2.500 INCHES IN, style_designator: STRAIGHT THRU, mounting_facility: LUG(S), operating_pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, valve_operation_method: MANUAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-475-4707, 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
B-271 SHEET 1
NSN: 4820-01-475-4707
FSC: 4820
CAGE: 15645 — COOPER CAMERON CORP COOPER CAMERON VALVES DIV (USA)
SPECIFICATIONS
materialIRON MALLEABLE BODY
valve_size2.500 INCHES IN
special_features4LUGS; 5/8-11 THREADED BOLTS; 2-POSITION, 9.500 INCH LONG LOCKING HANDLE; BUNA-N SEAT MATERIAL; REPLACEMENT PARTS: UPPER STEM - NSN 4820-01-475-4683; VALVE DISK - NSN 4820-01-475-4663 IN
style_designatorSTRAIGHT THRU
mounting_facilityLUG(S)
operating_pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
valve_operation_methodMANUAL
end_item_identificationNAVY EQUIPMENT
part_name_assigned_by_controlling_agencyDEMCO SERIES NE-C LUG BUTTERFLY VALVE
NSN4820-01-475-4707
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: B-271 SHEET 1 · 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
MOUNTING FACILITY: LUG(S)
MATERIAL: STEEL COMP 316 FLOW CONTROL DEVICE
VALVE SIZE: 2.500 INCHES IN
OPERATING PRESSURE: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
STYLE DESIGNATOR: STRAIGHT THRU
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING FACILITYLUG(S)
MATERIALSTEEL COMP 316 FLOW CONTROL DEVICE
PART NAME ASSIGNED BY CONTROLLING AGENCYDEMCO SERIES NE-C LUG BUTTERFLY VALVE
MATERIALIRON MALLEABLE BODY
VALVE SIZE2.500 INCHES IN
OPERATING PRESSURE200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIALSTEEL COMP 316 STEM
STYLE DESIGNATORSTRAIGHT THRU
SPECIAL FEATURES4LUGS; 5/8-11 THREADED BOLTS; 2-POSITION, 9.500 INCH LONG LOCKING HANDLE; BUNA-N SEAT MATERIAL; REPLACEMENT PARTS: UPPER STEM - NSN 4820-01-475-4683; VALVE DISK - NSN 4820-01-475-4663 IN
VALVE OPERATION METHODMANUAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
3416-4130-1250Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-23378CLIISZ1-1/4Interchangeable
interchangeable cross-reference
interchangeable
B2 1-2Interchangeable
interchangeable cross-reference
interchangeable
1-212Interchangeable
interchangeable cross-reference
interchangeable
B-7212-234-21-2Interchangeable
interchangeable cross-reference
interchangeable
79C0187-01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B-271 SHEET 1?
B-271 SHEET 1 is a VALVE,BUTTERFLY.
What parts can replace B-271 SHEET 1?
There are 6 known substitutes for B-271 SHEET 1: 3416-4130-1250, MIL-S-23378CLIISZ1-1/4, B2 1-2 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B-271 SHEET 1?
B-271 SHEET 1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-475-4707. This indicates validated use in U.S. government and defense supply chains.
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