PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

451804Valve,pump

Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer · NSN 4320-00-625-4355 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-625-4355 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-625-4355. Primary manufacturer part number: 451804.
Features
  • Valve,pump — FSC 4320
  • General Characteristics Item Description: BRASS,3.313 IN. OD,2.156 IN. O/A H,1.375 IN. VANE H,2.250 IN. W ACROSS VANE,ONE 0.500 IN. DP BY 0.438 IN. W GROOVE ON TOP IN
  • 1 verified cross-reference
  • Primary manufacturer: Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
  • Flow control in piping systems
  • Pressure regulation
General Description

The Valve,pump, cataloged under National Stock Number 4320-00-625-4355, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-625-4355
Primary Part Number451804
Item NameValve,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerDover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
StatusACTIVE
General Characteristics Item DescriptionBRASS,3.313 IN. OD,2.156 IN. O/A H,1.375 IN. VANE H,2.250 IN. W ACROSS VANE,ONE 0.500 IN. DP BY 0.438 IN. W GROOVE ON TOP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5915-00-167-4877 INTERCHANGEABLE
Filter,line
Cross-Reference Index
Part NumberManufacturer
451804 PRIMARY Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA)
Related Parts
5915-00-167-4877INTERCHANGEABLE
FILTER,LINE

Frequently Asked Questions

What is NSN 4320-00-625-4355?

NSN 4320-00-625-4355 is a Valve,pump, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-625-4355?

NSN 4320-00-625-4355 has 1 cross-referenced part number: 451804 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).

What NSN replaces 4320-00-625-4355?

There is 1 known substitute for 4320-00-625-4355: 5915-00-167-4877. Verify interchangeability with system specifications before substitution.

What are the specifications of 451804?

Key specifications for 451804: General Characteristics Item Description: BRASS,3.313 IN. OD,2.156 IN. O/A H,1.375 IN. VANE H,2.250 IN. W ACROSS VANE,ONE 0.500 IN. DP BY 0.438 IN. W GROOVE ON TOP IN. 1 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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