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28139-1 — SHIELD,CAPACITOR

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

28139-1: SHIELD,CAPACITOR.

The SHIELD,CAPACITOR is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: PLASTIC, bonnet_type: INSIDE SPRING, overall_length: 1.070 INCHES NOMINAL IN, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, overall_diameter: 0.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-423-3052, 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
MRO→ MRO_GENERAL→ 28139-1
NSN: 4820-00-423-3052
NIINs: 004233052, 007059196
FSC: 4820 — Valves, Nonpowered
CAGE: 06853 — BENDIX COMMERCIAL VEHICLE SYSTEMS LLC DBA BENDIX COMMERCIAL VEHICLE SYSTEMS (USA)
SPECIFICATIONS
materialPLASTIC
bonnet_typeINSIDE SPRING
overall_length1.070 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
overall_diameter0.500 INCHES NOMINAL IN
special_featuresINCLUDES CLEVIS AND PIN FOR LEVER MOUNTING
style_designatorCYLINDRICAL
thread_directionRIGHT-HAND ALL ENDS
flow_control_deviceDISK
nominal_thread_size0.250 INCHES ALL ENDS IN
valve_operation_methodMANUAL
NSN4820-00-423-3052
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 28139-1 · 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
•
FLOW CONTROL DEVICE: DISK
•
CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) ALL ENDS
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: CROSS
•
BONNET TYPE: INSIDE SPRING
•
THREAD DIRECTION: RIGHT-HAND ALL ENDS
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORCROSS
BONNET TYPEINSIDE SPRING
THREAD DIRECTIONRIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
SPECIAL FEATURESINCLUDES CLEVIS AND PIN FOR LEVER MOUNTING
BONNET ATTACHMENT METHODINTEGRAL
END ITEM IDENTIFICATIONLOADER,SCOOP TYPE; DED 4/4 W/4 1-1/2 OR 5 CY GP BUCKET (CCE) W
SUBSTITUTES & CROSS-REFERENCES 3
E-535-526Reference document
Same NSN cross-reference
Reference document — Secondary reference
226639Reference document
Same NSN cross-reference
Reference document — Secondary reference
923051C91Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 28139-1?
28139-1 is a SHIELD,CAPACITOR. It is classified as a MRO (MRO_GENERAL).
What parts can replace 28139-1?
There are 3 known substitutes for 28139-1: E-535-526, 226639, 923051C91. Substitute compatibility should be verified for your specific system.
What is the NSN for 28139-1?
28139-1 is cataloged in the U.S. Government catalog under NSN 4820-00-423-3052. This indicates validated use in U.S. government and defense supply chains.
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