Compressors SERIES HD940

BLACKMER HD Series - Compressors for many industrial applications with a large number of industrial gases


BLACKMER Industrial Compressors Series HD940


The HD940 Series is the largest offering of Blackmer reciprocating gas compressors, and features flow rates of 125.2 CFM (212 m³/hr) at max rpm. These single-stage, double acting two-cylinder gas compressors are available in both air-cooled (HD942/943), and liquid-cooled (HDL942/943) models. For precise leakage control and to minimize product contamination, the HD940 Series gas compressors are available in double- (HD942/HDL942), or triple-seal (HD943/HDL943) models. Additionally, the S3R oil control seal, a feature only available on HD600 and HD940 Series Compressors, keeps oil in the crankcase and prevents oil migration within the compressor. All HD Series Compressors are equipped with thick and robust wear parts – piston rings, needle bearings, and high-efficiency valves that will keep the HD Series compressors operating long between maintenance cycles. Equipped with an array of features such as a ductile iron head and cylinders, steel pistons and self-adjusting piston rod seals, HD compressors provide maximum performance, energy efficiency, quiet operation, low maintenance cost and reliability under the most severe service conditions.

Features and Benefits

  • Single-stage models with piston displacements to 125 cfm (212 m3/hr) and working pressures up to 350 psi (24 bar) for use on low to moderate compression ratio applications
  • Available in air-cooled or liquid-cooled models
  • Available with double- and triple-seal models, providing positive sealing under all operating conditions with materials to suit any application
  • Triple-seal models are well suited for handling toxic, hazardous or corrosive gases


  • Vapor recovery
  • Gas gathering
  • Gas transfer
  • Gas evacuation
  • Enhanced recovery
  • Gas blanketing
  • Pressure boosting
  • Flare elimination
  • Leak test recovery
  • Liquid gas transfer

Common Industrial Gases:

  • Ammonia
  • Argon
  • Butadiene
  • Butane
  • Carbon Dioxide
  • Chlorine
  • Ethane
  • Ethyl Alcohol
  • Helium
  • Hydrogen
  • Hydrogen Chloride
  • Isobutene
  • Methyl Chloride
  • Nitrogen
  • Nitrous Oxide
  • Propylene
  • Refrigerants
  • Sulfur Dioxide
  • Vinyl Chloride

Technical Data BLACKMER HD940 Series

  • Inlet - Outlet: 2" - 300# ANSI
  • Cylinder: 2
  • Flow rate: 212 m3/h
  • Inlet pressure (Min.): 0,21 bar
  • Outlet pressure (Max.): 24,1 bar