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1B7989-000A2 — DIAPHRAGM,ACTUATOR VALVE,SPECIAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

1B7989-000A2: DIAPHRAGM,ACTUATOR VALVE,SPECIAL.

DIAPHRAGM,ACTUATOR VALVE,SPECIAL. Key specifications include material: RUBBER AND STEEL, hole_diameter: 0.190 INCHES NOMINAL IN, overall_height: 0.031 INCHES NOMINAL IN, shank_diameter: 0.688 INCHES NOMINAL IN, outside_diameter: 2.875 INCHES NOMINAL IN, style_designator: SPECIAL SHAPED. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-547-0718, 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
1B7989-000A2
NSN: 4820-00-547-0718
FSC: 4820 — Valves, Nonpowered
CAGE: 22508 — FISHER CONTROLS CO INC (USA)
SPECIFICATIONS
materialRUBBER AND STEEL
hole_diameter0.190 INCHES NOMINAL IN
overall_height0.031 INCHES NOMINAL IN
shank_diameter0.688 INCHES NOMINAL IN
outside_diameter2.875 INCHES NOMINAL IN
style_designatorSPECIAL SHAPED
bolt_hole_quantity6
bolt_circle_diameter2.562 INCHES NOMINAL IN
center_hole_diameter0.035 INCHES NOMINAL IN
NSN4820-00-547-0718
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 1B7989-000A2 · 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
•
SHANK DIAMETER: 0.688 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.875 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
BOLT HOLE QUANTITY: 6
•
BOLT CIRCLE DIAMETER: 2.562 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.035 INCHES NOMINAL IN
•
MATERIAL: RUBBER AND STEEL
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.688 INCHES NOMINAL IN
OVERALL HEIGHT0.031 INCHES NOMINAL IN
OUTSIDE DIAMETER2.875 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
BOLT HOLE QUANTITY6
BOLT CIRCLE DIAMETER2.562 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.035 INCHES NOMINAL IN
MATERIALRUBBER AND STEEL
HOLE DIAMETER0.190 INCHES NOMINAL IN
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: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1B7989-000A2?
1B7989-000A2 is a DIAPHRAGM,ACTUATOR VALVE,SPECIAL.
What is the NSN for 1B7989-000A2?
1B7989-000A2 is cataloged in the U.S. Government catalog under NSN 4820-00-547-0718. 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.