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920-138 6IN — VALVE,BUTTERFLY

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

920-138 6IN: VALVE,BUTTERFLY.

The VALVE,BUTTERFLY is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY SEAT, valve_size: 6.000 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS, mounting_facility: LUG(S). This part is cataloged in the U.S.

Government catalog under NSN 4820-01-342-6717, 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
920-138 6IN
NSN: 4820-01-342-6717
FSC: 4820 — Valves, Nonpowered
CAGE: 1NB39 — DOVER RESOURCES, INC. DIV NORRISEAL (USA)
SPECIFICATIONS
materialNICKEL ALLOY SEAT
valve_size6.000 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
mounting_facilityLUG(S)
bolt_hole_quantity8 ALL ENDS
flange_face_designPLAIN ALL ENDS
operating_pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
face_to_face_distance2.125 INCHES IN
maximum_operating_temp180.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_methodMANUAL
NSN4820-01-342-6717
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 920-138 6IN · 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
•
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
•
FLANGE FACE DESIGN: PLAIN ALL ENDS
•
BOLT CIRCLE NOMINAL DIAMETER: 9.500 INCHES ALL ENDS IN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS
•
BOLT HOLE NOMINAL DIAMETER: 0.750 INCHES ALL ENDS IN
•
OPERATING PRESSURE: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
VALVE SIZE: 6.000 INCHES IN
TECHNICAL CHARACTERISTICS
FLANGE SHAPEROUND WITH HOLES ALL ENDS
FLANGE FACE DESIGNPLAIN ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER9.500 INCHES ALL ENDS IN
CONNECTION TYPEFLANGE ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
BOLT HOLE NOMINAL DIAMETER0.750 INCHES ALL ENDS IN
OPERATING PRESSURE200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VALVE SIZE6.000 INCHES IN
MAXIMUM OPERATING TEMP180.0 FAHRENHEIT SINGLE RESPONSE DEGF
MOUNTING FACILITYLUG(S)
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 2
M3011-645A 6INReference document
Same NSN cross-reference
Reference document — Secondary reference
920J138Reference 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 920-138 6IN?
920-138 6IN is a VALVE,BUTTERFLY.
What parts can replace 920-138 6IN?
There are 2 known substitutes for 920-138 6IN: M3011-645A 6IN, 920J138. Substitute compatibility should be verified for your specific system.
What is the NSN for 920-138 6IN?
920-138 6IN is cataloged in the U.S. Government catalog under NSN 4820-01-342-6717. 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.