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Technical Data Sheet
PartsTable / COMPONENT / BPV21
BPV21 ✓ 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

CAPACITOR,FIXED,MICA DIELECTRIC. Key specifications include material: ALUMINUM BODY, seat_angle: 45.0 DEGREES ALL ENDS, thread_class: 3A ALL ENDS A, connection_style: FLARED (TUBE) ALL ENDS, special_features: FOR 3/8,1/2,OR 5/8 IN. TUBE OD IN, style_designator: ANGLE PLAIN STRAP TYPE LINE PIERCING.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-128-9797, 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
BPV21
NSN: 4820-00-128-9797
FSC: 4820
CAGE: 87732 — UNITED REFRIGERATION, INC (USA)
SPECIFICATIONS
materialALUMINUM BODY
seat_angle45.0 DEGREES ALL ENDS
thread_class3A ALL ENDS A
connection_styleFLARED (TUBE) ALL ENDS
special_featuresFOR 3/8,1/2,OR 5/8 IN. TUBE OD IN
style_designatorANGLE PLAIN STRAP TYPE LINE PIERCING
thread_directionRIGHT-HAND ALL ENDS
flow_control_deviceNEEDLE
nominal_thread_size0.438 INCHES ALL ENDS IN
valve_operation_methodMANUAL
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity1 REDUCER
NSN4820-00-128-9797
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: BPV21 · 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
•
SEAT ANGLE: 45.0 DEGREES ALL ENDS
•
VALVE OPERATION METHOD: MANUAL
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
STYLE DESIGNATOR: ANGLE PLAIN STRAP TYPE LINE PIERCING
•
THREAD CLASS: 3A ALL ENDS A
•
MATERIAL: ALUMINUM BODY
•
CONNECTION STYLE: FLARED (TUBE) ALL ENDS
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 (FLIS)
SEAT ANGLE45.0 DEGREES ALL ENDS
VALVE OPERATION METHODMANUAL
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
THREAD SERIES DESIGNATORUNF ALL ENDS
STYLE DESIGNATORANGLE PLAIN STRAP TYPE LINE PIERCING
THREAD CLASS3A ALL ENDS A
MATERIALALUMINUM BODY
CONNECTION STYLEFLARED (TUBE) ALL ENDS
FURNISHED ITEMS AND QUANTITY1 REDUCER
FLOW CONTROL DEVICENEEDLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
A4109Interchangeable
interchangeable cross-reference
interchangeable
114300-6Interchangeable
interchangeable cross-reference
interchangeable
AP2Interchangeable
interchangeable cross-reference
interchangeable
409686Interchangeable
interchangeable cross-reference
interchangeable
40798-1Interchangeable
interchangeable cross-reference
interchangeable
483649-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BPV21?
BPV21 is a CAPACITOR,FIXED,MICA DIELECTRIC.
What parts can replace BPV21?
There are 13 known substitutes for BPV21: A4109, 114300-6, AP2 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BPV21?
BPV21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-128-9797. 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