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Blackmer NGH100 V1 600 Reciprocating Gas Compressor Blackmer NGH100 Cutaway 600 Reciprocating Gas Compressor

NGH100 Series Reciprocating Gas Compressors NGH1013, NGH1023

The Blackmer NGH100 Series Reciprocating Gas Compressor is a 100 BHP rated horizontal compressor unit that has been developed for use in vapor-recovery, wellhead-transfer and artificial-lift applications in the upstream oil and gas market and is compatible with sour gas up with up to 8% dry hydrogen sulfide (H₂S). The NGH100 comes in the two-cylinder, single-stage model the NGH1013 which has a flow rate up to 345.8 CFM (588 m³/hr) at 1,800 rpm, and the NGH1023 which is a two-stage, one-cylinder model with flow rate of 172.9 CFM (294 m³/hr) at 1,800 rpm. All castings for the NGH100 Series are constructed of ductile iron with a balanced forged-steel crankshaft. Piston rings and rider bands are PTFE/PEEK and needle bearings are steel with no yellow metals used. Multi-packing seals are standard. Even in the most severe service conditions, the NG Series Gas Compressors offer the best-combined characteristics of sustained high-level performance, energy efficiency, trouble-free operation and low maintenance cost.

Performance and Specifications


Model NGH1013 NGH1023
Number of Cylinders Per Stage 2 2 1
Bore – in. (mm) Cyl 1 3.25 (82.55) 6.00 (152.4) 6.00 (152.4)
Cyl 2 3.25 (82.55) 6.00 (152.4) 3.25 (82.55)
Stroke – in. (mm) 3.0 (76.2) 3.0 (76.2) 3.0 (76.2)
MAWP – psig (bar) Stage 1 1,500 (103.42) 500 (34.47) 500 (34.47)
Stage 2 N/A N/A 1,500 (103.42)
Minimum Speed – RPM 500 500 500
Maximum Speed – RPM 1,800 1,800 1,800
Piston Displacement CFM (m³/h)
@ 100 RPM 5.3 (9) 19.2 (32.6) 9.6 (16.3)
@ 900 RPM 48 (81.6) 172.9 (294) 86.4 (147)
@ 1,200 RPM 64 (109) 231 (392) 115.3 (196)
@ 1,800 RPM 96 (163) 345.8 (588) 172.9 (294)
Maximum Discharge Temperature – °F (°C) 350° (176.7°) 350° (176.7°) 350° (176.7°)
Maximum Brake Horsepower 100 100 100
Maximum Rod Load – lbs (kg) 7,000 (3175.2) 7,000 (3175.2) 7,000 (3175.2)
Bare Compressor Weight* – lbs (kg) 1,300 (589.7) 1,500 (680.4) 1,400 (635.0)
Inlet/Outlet Stage 1 1.5" 900# ANSI 3" 300# ANSI 3" 300# ANSI
Stage 2 N/A N/A 1.5" 900# ANSI

Features and Benefits

  • Wet and dry gas-handling capability
  • All casted parts are ductile-iron construction
  • Compatible with sour gas up with up to 8% dry hydrogen sulfide (H2S)
  • Flow rates to 3,000 MSCFD
  • Maximum allowable working pressure of 1,500 psi (103 bar)
  • Triple-seal packing is standard


  • Wellhead extraction and transfer
  • Vapor-recovery units
  • Artificial lift of natural gas

Visit the Compressor Solutions page for more information about the NG Series Reciprocating Gas Compressors.
Learn more about Blackmer Reciprocating Compressors with our interactive tool.


Options Available Literature  Details
Crankcase Oil Heater CB322 Used to maintain adequate oil temperature in cold to severe climates 
Distance Piece Options CB037 Section of gas compressor between crankcase and compressor cylinder that isolates the two areas, providing oil-free operation for cylinder 
Suction Valve Unloaders & Systems CB039 Prevents the compression of gas in the cylinder by holding the suction valves open, allowing compressor to be started without a load and to control compressor's capacity
Various O-Ring Materials CB001 Optional O-ring materials including PTFE, FKM, Neoprene, Ethylene-Propylene
Oversized Flywheels   Available for various drive options

Ancillary Equipment

Equipment Available Literature  Details
4-Way Valves CB046 For piping, in aiding for easy transition from liquid transfer to vapor recovery - comes with handle and flow indicator
Electrical Schematic CB276  Overview of a generalized wiring schematic for typical installations
Float Switch Information CB145 Activates alarms and/or shut-down equipment when a liquid rises or falls past the switch
Liquid Traps CB212 Trap installed in the suction line to stop liquid from entering the compressor
Liquid Traps, ASME Code CB218  ASME coded trap installed in the suction line to stop liquid from entering the compressor
Low Oil Pressure Switches  CB020  Sends signal when the compressor's crankcase oil pressure falls 
Mounting Arrangements  CB111  A variety of mounting arrangements available for compressors 
Strainer CB172  Features a 30-mesh stainless steel screen 
Belt Guards    Available in either aluminum or stainless steel 
Pressure Switches    Activates alarms and/or shutdown equipment for suction, discharge, differential, and/or oil pressure 
Temperature Switches    Activates alarms and/or shutdown equipment for discharge and/or oil temperature 
Temperature Gauges    Visual confirmation of temperature - typically on the suction and discharge process gas location 
Thermowells    Protects temperature monitoring devices from harsh process gas conditions 
Control Panels and Starters    Junction box and full turn-key functionality available in required classifications 
NPT or Welded Piping Systems    Threaded or welded steel piping systems 
Pressure Gauges  CB105  Visual confirmation of pressure - typically on the suction, discharge, and oil locations 
Receivers    Often times used as a holding vessel for pressure control on the suction or discharge 
Relief Valves    Overpressure safety devices required on the compressor discharge and any associated ASME code vessels 
Shutoff Valves    Available in either manual or powered 
Aftercoolers    Available in either air or water cooled 
Motor or engine drives    Available in various classifications and fuel types 
Repair tool kits  CB110  List of part numbers for special tools and tool kits used on compressors 
Unloader Solenoid Valve CB315 
3-way solenoid suction valve unloader control