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309211 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

309211: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER, hole_diameter: 0.280 INCHES NOMINAL IN, outside_diameter: 3.375 INCHES NOMINAL IN, style_designator: FLAT, bolt_hole_quantity: 11, material_thickness: 0.018 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-783-6561, 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
309211
NSN: 4820-00-783-6561
NIINs: 007836561, 013333706
FSC: 4820 — Valves, Nonpowered
CAGE: 41387 — SIEMENS INDUSTRY, INC. DBA SIEMENS ENERGY DIV PROCESS INDUSTRIES AND DRIVES (USA)
SPECIFICATIONS
materialRUBBER
hole_diameter0.280 INCHES NOMINAL IN
outside_diameter3.375 INCHES NOMINAL IN
style_designatorFLAT
bolt_hole_quantity11
material_thickness0.018 INCHES NOMINAL IN
bolt_circle_diameter2.812 INCHES NOMINAL IN
center_hole_diameter0.250 INCHES NOMINAL IN
NSN4820-00-783-6561
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 309211 · 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
•
OUTSIDE DIAMETER: 3.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 11
•
BOLT CIRCLE DIAMETER: 2.812 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
MATERIAL: RUBBER
•
HOLE DIAMETER: 0.280 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER3.375 INCHES NOMINAL IN
STYLE DESIGNATORFLAT
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
BOLT HOLE QUANTITY11
BOLT CIRCLE DIAMETER2.812 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.250 INCHES NOMINAL IN
MATERIALRUBBER
HOLE DIAMETER0.280 INCHES NOMINAL IN
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 309211?
309211 is a DIAPHRAGM,VALVE,FLAT.
What is the NSN for 309211?
309211 is cataloged in the U.S. Government catalog under NSN 4820-00-783-6561. 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.