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728812-3 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

728812-3: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE, overall_height: 1.300 INCHES NOMINAL IN, outside_diameter: 2.730 INCHES NOMINAL IN, style_designator: SPECIAL SHAPED, material_thickness: 0.025 INCHES NOMINAL IN, center_hole_diameter: 0.644 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4810-01-666-9129, 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
728812-3
NSN: 4810-01-666-9129
FSC: 4810 — Valves, Powered
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialRUBBER SILICONE
overall_height1.300 INCHES NOMINAL IN
outside_diameter2.730 INCHES NOMINAL IN
style_designatorSPECIAL SHAPED
material_thickness0.025 INCHES NOMINAL IN
center_hole_diameter0.644 INCHES NOMINAL IN
end_item_identificationB-52 AIRCRAFT
part_name_assigned_by_controlling_agencyDIAPHRAGM
NSN4810-01-666-9129
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 728812-3 · 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: 2.730 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
MATERIAL THICKNESS: 0.025 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.644 INCHES NOMINAL IN
•
MATERIAL: RUBBER SILICONE
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.300 INCHES NOMINAL IN
OUTSIDE DIAMETER2.730 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
MATERIAL THICKNESS0.025 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.644 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYDIAPHRAGM
END ITEM IDENTIFICATIONB-52 AIRCRAFT
MATERIALRUBBER SILICONE
SUBSTITUTES & CROSS-REFERENCES 1
728812Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 728812-3?
728812-3 is a DIAPHRAGM,VALVE,FLAT.
What parts can replace 728812-3?
There is 1 known substitute for 728812-3: 728812. Substitute compatibility should be verified for your specific system.
What is the NSN for 728812-3?
728812-3 is cataloged in the U.S. Government catalog under NSN 4810-01-666-9129. 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.