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Technical Data Sheet
PartsTable / COMPONENT / 9989
9989 ✓ 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 TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: GLASS, body_width: 1.938 INCHES NOMINAL IN, case_style: SQUARE, seal_width: 0.438 INCHES NOMINAL IN, body_height: 2.750 INCHES NOMINAL IN, body_length: 2.156 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-00-147-5851, 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
9989
NSN: 4810-00-147-5851
FSC: 4810
CAGE: 90099 — NORTHROP GRUMMAN SYSTEMS CORPORATION DIV MARINE SYSTEMS (USA)
SPECIFICATIONS
materialGLASS
body_width1.938 INCHES NOMINAL IN
case_styleSQUARE
seal_width0.438 INCHES NOMINAL IN
body_height2.750 INCHES NOMINAL IN
body_length2.156 INCHES NOMINAL IN
usage_designINDOOR
inclosure_typeHERMETICALLY SEALED
overall_height3.250 INCHES NOMINAL IN
overall_length6.000 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
style_designatorPLAIN FLANGED
NSN4810-00-147-5851
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 9989 · 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
•
SEATING SURFACE SHAPE: FLAT
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: PLAIN FLANGED
•
SURFACE TREATMENT: CHROMIUM OVERALL
•
UNDER FLANGE HEIGHT: 1.125 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SEATING SURFACE SHAPEFLAT
MATERIALSTEEL OVERALL
STYLE DESIGNATORPLAIN FLANGED
SURFACE TREATMENTCHROMIUM OVERALL
UNDER FLANGE HEIGHT1.125 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER2.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
43-961Interchangeable
interchangeable cross-reference
interchangeable
D551Interchangeable
interchangeable cross-reference
interchangeable
PH272AInterchangeable
interchangeable cross-reference
interchangeable
9989Interchangeable
interchangeable cross-reference
interchangeable
AL2209Interchangeable
interchangeable cross-reference
interchangeable
264Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9989?
9989 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace 9989?
There are 14 known substitutes for 9989: 43-961, D551, PH272A and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9989?
9989 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-00-147-5851. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026