PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1025876Valve,butterfly

Norriseal Norris Values Div Dba Dover Co · NSN 4820-01-050-1281 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-050-1281 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-050-1281. Primary manufacturer part number: 1025876.
Features
  • Valve,butterfly — FSC 4820
  • Material: NICKEL ALLOY 400 STEM
  • Style Designator: STRAIGHT THRU
  • Material: COPPER ALLOY 922 BODY
  • Valve Operation Method: MANUAL
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT
  • Minimum Operating Temp: -30.0 FAHRENHEIT DEGF
  • Material Document and Classification: ASTM B164 CLASS A ASSN STD SINGLE MATERIAL RESPONSE SEAT
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy 400 Stem construction
General Description

The Valve,butterfly, cataloged under National Stock Number 4820-01-050-1281, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Norriseal Norris Values Div Dba Dover Co. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-050-1281
Primary Part Number1025876
Item NameValve,butterfly
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNorriseal Norris Values Div Dba Dover Co
StatusACTIVE
MaterialNICKEL ALLOY 400 STEM
Style DesignatorSTRAIGHT THRU
MaterialCOPPER ALLOY 922 BODY
Valve Operation MethodMANUAL
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAT
Minimum Operating Temp-30.0 FAHRENHEIT DEGF
Material Document and ClassificationASTM B164 CLASS A ASSN STD SINGLE MATERIAL RESPONSE SEAT
Material Document and ClassificationASTM B61 ASSN STD SINGLE MATERIAL RESPONSE BODY
Features ProvidedMANUAL OVERRIDE
Valve Size5.000 INCHES IN
Maximum Operating Temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
MaterialNICKEL ALLOY FLOW CONTROL DEVICE
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
Material Document and ClassificationQQ-N-288 COMP A OR E FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
Operating Pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4820-01-088-0814R2030-64AA-2KM INTERCHANGEABLE
Valve,butterfly
Dover Resources, Inc. Div Norriseal
4820-01-189-5745R2030-64AA-1FM 6IN INTERCHANGEABLE
Valve,butterfly
Norriseal Norris Values Div Dba Dover Co
Cross-Reference Index
Part NumberManufacturer
R2030-64AA-1FM Norriseal Norris Values Div Dba Dover Co (USA)
59201F550 Norriseal Norris Values Div Dba Dover Co (USA)
910-082-5IN Norriseal Norris Values Div Dba Dover Co (USA)
1035131 Norriseal Norris Values Div Dba Dover Co (USA)
1025876 PRIMARY Norriseal Norris Values Div Dba Dover Co (USA)
5R2030-64AA-1FM Norriseal Norris Values Div Dba Dover Co (USA)
R2030-64AA-2KM Norriseal Norris Values Div Dba Dover Co (USA)
5R2030-64AIC Norriseal Norris Values Div Dba Dover Co (USA)
Related Parts
4820-01-088-0814INTERCHANGEABLE
VALVE,BUTTERFLY
R2030-64AA-2KM
4820-01-189-5745INTERCHANGEABLE
VALVE,BUTTERFLY
R2030-64AA-1FM 6IN

Frequently Asked Questions

What is NSN 4820-01-050-1281?

NSN 4820-01-050-1281 is a Valve,butterfly, manufactured by Norriseal Norris Values Div Dba Dover Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-050-1281?

NSN 4820-01-050-1281 has 8 cross-referenced part numbers: R2030-64AA-1FM (Norriseal Norris Values Div Dba Dover Co), 59201F550 (Norriseal Norris Values Div Dba Dover Co), 910-082-5IN (Norriseal Norris Values Div Dba Dover Co), 1035131 (Norriseal Norris Values Div Dba Dover Co), 1025876 (Norriseal Norris Values Div Dba Dover Co) and 3 more.

What NSN replaces 4820-01-050-1281?

There are 2 known substitutes for 4820-01-050-1281: 4820-01-088-0814, 4820-01-189-5745. Verify interchangeability with system specifications before substitution.

What are the specifications of 1025876?

Key specifications for 1025876: Material: NICKEL ALLOY 400 STEM; Style Designator: STRAIGHT THRU; Material: COPPER ALLOY 922 BODY; Valve Operation Method: MANUAL. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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