PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

XL1.5Pump Unit,rotary

Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer · NSN 4320-01-580-9740 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-580-9740 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-580-9740. Primary manufacturer part number: XL1.5.
Features
  • Pump Unit,rotary — FSC 4320
  • Supplementary Features: OFFER THE BEST COMBINED CHARACTERISTICS OF SUSTAINEDHIGH LEVEL PERFORMANCE, ENERGY EFFIENCY, TROUBLE-FREE OPERATION AND LOW MAINTENANCE COST
  • 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
General Description

The Pump Unit,rotary, cataloged under National Stock Number 4320-01-580-9740, 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-01-580-9740
Primary Part NumberXL1.5
Item NamePump Unit,rotary
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerDover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
StatusACTIVE
Supplementary FeaturesOFFER THE BEST COMBINED CHARACTERISTICS OF SUSTAINEDHIGH LEVEL PERFORMANCE, ENERGY EFFIENCY, TROUBLE-FREE OPERATION AND LOW MAINTENANCE COST
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3439-00-545-339650-1-5 INTERCHANGEABLE
Desoldering Wick
Illinois Tool Works Inc. Div Itw Chemtronics
6685-01-602-5250XL-15 INTERCHANGEABLE
Optic Sensor
Excel Dryer, Inc.
Cross-Reference Index
Part NumberManufacturer
XL1.5 PRIMARY Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA)
Related Parts
3439-00-545-3396INTERCHANGEABLE
DESOLDERING WICK
50-1-5
6685-01-602-5250INTERCHANGEABLE
OPTIC SENSOR
XL-15

Frequently Asked Questions

What is NSN 4320-01-580-9740?

NSN 4320-01-580-9740 is a Pump Unit,rotary, 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 4320-01-580-9740?

NSN 4320-01-580-9740 has 1 cross-referenced part number: XL1.5 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).

What NSN replaces 4320-01-580-9740?

There are 2 known substitutes for 4320-01-580-9740: 3439-00-545-3396, 6685-01-602-5250. Verify interchangeability with system specifications before substitution.

What are the specifications of XL1.5?

Key specifications for XL1.5: Supplementary Features: OFFER THE BEST COMBINED CHARACTERISTICS OF SUSTAINEDHIGH LEVEL PERFORMANCE, ENERGY EFFIENCY, TROUBLE-FREE OPERATION AND LOW MAINTENANCE COST; Special Features: CONSTRUCTED OF DUCTILE IRON THAT WILL WITHSTAND SUDDEN THERMAL SHOCK AND STRESS WELL BEYOND THE CAPABILITIES OF CAST IRON; MODELS ARE AVAILABLE IIN 1.25, 1.5, 2, 3 AND 4 INCH PORT SIZES WITH CAPACITIES FROM 5 TO 345 GPM; 1.25 AND 1.5 INCH MODELS HAVE NPT TAPPED PORTS AND THE 2, 3 AND 4 INCH MODELS HAVE FLANGED PORTS; THIS PUMP IS BASE MOUNTED; ALSO IT IS FITTED WITH AN INTEGRAL BRACKET FOR DIRECT MOUNT TO A NEMA C FACE MOTOR IN. 2 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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