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911L561 — VALVE,BUTTERFLY

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

911L561: VALVE,BUTTERFLY.

The VALVE,BUTTERFLY is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT, valve_size: 10.000 INCHES IN, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS, features_provided: MANUAL OVERRIDE, mounting_facility: BRACKET(S). This part is cataloged in the U.S.

Government catalog under NSN 4820-01-377-6647, 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
911L561
NSN: 4820-01-377-6647
FSC: 4820 — Valves, Nonpowered
CAGE: 91363 — NORRISEAL NORRIS VALUES DIV DBA DOVER CO (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT
valve_size10.000 INCHES IN
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
features_providedMANUAL OVERRIDE
mounting_facilityBRACKET(S)
face_to_face_distance9.380 INCHES IN
valve_operation_methodMANUAL
NSN4820-01-377-6647
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 911L561 · 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 TYPE: FLANGE ALL ENDS
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS
•
VALVE SIZE: 10.000 INCHES IN
•
FEATURES PROVIDED: MANUAL OVERRIDE
•
MOUNTING FACILITY: BRACKET(S)
•
FACE TO FACE DISTANCE: 9.380 INCHES IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT
TECHNICAL CHARACTERISTICS
CONNECTION TYPEFLANGE ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
VALVE SIZE10.000 INCHES IN
FEATURES PROVIDEDMANUAL OVERRIDE
MOUNTING FACILITYBRACKET(S)
FACE TO FACE DISTANCE9.380 INCHES IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT
MATERIALALUMINUM ALLOY BODY
MATERIALCOPPER ALLOY 630 FLOW CONTROL DEVICE
VALVE OPERATION METHODMANUAL
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

No substitute or cross-reference records for this part.

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 911L561?
911L561 is a VALVE,BUTTERFLY.
What is the NSN for 911L561?
911L561 is cataloged in the U.S. Government catalog under NSN 4820-01-377-6647. 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.