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Technical Data Sheet
PartsTable / COMPONENT / 81640-01
81640-01 ✓ 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 DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER, hole_diameter: 0.188 INCHES NOMINAL IN, outside_diameter: 2.250 INCHES NOMINAL IN, style_designator: FLAT, bolt_hole_quantity: 12, material_thickness: 0.007 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-888-3305, 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
81640-01
NSN: 4820-00-888-3305
FSC: 4820
CAGE: 24658 — GENERAL REGULATOR CORP. DBA ACCUDRIV (USA)
SPECIFICATIONS
materialRUBBER
hole_diameter0.188 INCHES NOMINAL IN
outside_diameter2.250 INCHES NOMINAL IN
style_designatorFLAT
bolt_hole_quantity12
material_thickness0.007 INCHES NOMINAL IN
bolt_circle_diameter1.812 INCHES NOMINAL IN
NSN4820-00-888-3305
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 81640-01 · 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
•
MATERIAL THICKNESS: 0.007 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT
•
BOLT HOLE QUANTITY: 12
•
MATERIAL: RUBBER
•
OUTSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 1.812 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.007 INCHES NOMINAL IN
STYLE DESIGNATORFLAT
BOLT HOLE QUANTITY12
MATERIALRUBBER
OUTSIDE DIAMETER2.250 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER1.812 INCHES NOMINAL IN
HOLE DIAMETER0.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
CD4017ADInterchangeable
interchangeable cross-reference
interchangeable
932364-1BInterchangeable
interchangeable cross-reference
interchangeable
81640Interchangeable
interchangeable cross-reference
interchangeable
26041013Interchangeable
interchangeable cross-reference
interchangeable
7837635Interchangeable
interchangeable cross-reference
interchangeable
18799Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 81640-01?
81640-01 is a DIAPHRAGM,VALVE,FLAT.
What parts can replace 81640-01?
There are 6 known substitutes for 81640-01: CD4017AD, 932364-1B, 81640 and 3 more. Substitute compatibility should be verified for your specific system.
Is 81640-01 still available?
81640-01 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026