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NGH100 v1 600 NGH100 Cutaway 600 NG-NGS-pump

NG Series Reciprocating Gas Compressors NG080, NG160, NG170, NG360, NG370, NG600, NG610, NG640, NG940, NGH100 (Horizontal)

NG Reciprocating Gas Compressors are highly efficient, heavy-duty single and two-stage oil-free compressors. Advanced design technology and materials provide maximum performance with minimum maintenance. The NG Series is specially designed for a wide range of wellhead applications for oil and gas production and storage operations. NGS Sour Gas compressors can handle up to 8% dry H2S.

These compressors come standard with a full compartment distance piece. Each NG compressor is constructed with two sets of piston rod seals between the crosshead guide and cylinder area, which form the distance piece. The distance piece provides leakage control and helps prevent oil contamination from any condensates that might be in the gas stream. Connections are provided in the distance-piece for purging, pressurizing or venting as needed.

Performance and Specifications

NG & NGS Single-Stage

Single-Stage NG082 NG162 NG362 NG602 NG642 NG942
No. of Cylinders 1 2 2 2 2 2 Double Acting
Bore x Stroke, in. (mm) 3.0 x 2.5 3.0 x 2.5 4.0 x 3.0 4.625 x 4.0 3.25 x 4.0 4.625 x 4.0
(76.2 x 63.5) (76.2 x 63.5) (102 x 76) (117 x 102) (82.5 x 102) (117 x 102)
MAWP, psia (bar) 350 (24.1) 350 (24.1) 350 (24.1) 350 (24.1) 515 (35.5) 350 (24.1)
Speed, rpm 350 - 825 350 - 825 350 - 825 350 - 825 350 - 825 350 - 825
Piston Displacement, CFM (m³/hr)
@ Min rpm 3.58 (6.1) 7.16 (12.2) 15.3 (26.0) 27.2 (46.3) 13.4 (22.8) 52.46 (89.1)
@ Max rpm 8.45 (14.35) 16.9 (28.7) 36.0 (61.2) 64.2 (109.0) 31.7 (53.8) 125.2 (212)
Max. Discharge Temp. 350°F (176°C) 350°F (176°C) 350°F (176°C) 350°F (176°C) 350°F (176°C) 350°F (176°C)
Max. BHP (kw) 7.5 (5) 10 (7.5) 15 (11) 40 (30) 40 (30) 50 (37)
Weight, lb. (kg) ~215 (97) ~225 (102) ~365 (166) ~705 (320) ~725 (329) ~905 (410)
Inlet / Outlet Connections* 0.75" NPT 0.75" NPT 1.50" NPT or Weld Flanges 2.00", 1.50" NPT or Weld Flanges 2.00", 1.50" NPT or Weld Flanges 2" 300# ANSI

Note: NGS has Maximum H2S 8%

NG & NGS Two-Stage

Two-Stage NG172 NG372 NG612
No. of Cylinders 2 2 2
Bore - Stage 1, in. (mm) 3.0 (76.2) 4.63 (117) 6.0 (152)
Bore - Stage 2, in. (mm) 1.75 (44.5) 2.69 (68) 3.25 (83)
Stroke, in. (mm) 2.5 (63.5) 3.0 (76) 4.0 (102)
MAWP, psia (bar) 615 (42.4) 615 (42.4 415 (28.6)
Speed, rpm 350 - 825 350 - 825 350 - 825
Piston Displacement, CFM (m³/hr)
@ Min rpm 3.57 (6.07) 10.2 (17.3) 22.9 (38.9)
@ Max rpm 8.42 (14.3) 24.1 (40.8) 53.7 (91.2)
Piston rod dia. - in. (mm) 0.75 (19.1) 0.75 (19.1) 1.25 (31.8)
Max. Discharge Temp. 350°F (176°C)
Max. BHP (kw) 10 (7.5) 15 (11) 40 (30)
Weight, lb. (kg) ~245 (111) ~405 (184) ~775 (352)
Inlet / Outlet Connections 0.75" NPT 1.25" x 1" NPT 2", 1.5" NPT or Weld

Note: NGS has Maximum H2S 8%

NGH100

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

  • Ductile-iron head and cylinder that outperform cast-iron models
  • O-ring gaskets throughout for sealing under all operating conditions
  • Flow rates to 3,000 MSCFD
  • Maximum of 100-horsepower energy usage
  • Maximum allowable working pressure of 1,500 psi (103 bar)

Applications:

  • Oil and gas production
  • Tank-battery vapor recovery
  • Wellhead vapor control
  • Wellhead annulus reduction
  • Pressure boosting

Visit the Compressor Solutions page for more information about the NG Series Reciprocating Gas Compressors.

Options

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 

Videos

Downloads

Installation Operation Manuals (IOMs)

NG082C, NGS082C, NG162C, NG362E, NG602E, NG642E, NGS162C, NGS362E, NGS602E, NGS642E, NG172C, NG372C, NG612C, NGS172C, NGS372C, NGS612C

Materials of Construction

Dimensions

NG082, NGS082, NG162, NGS162, NG362, NGS362

Spec Sheets

NG082C, NGS082C, NG162C, NG362E, NG602E, NG642E, NGS162C, NGS362E, NGS602E, NGS642E, NG172C, NG372C, NG612C, NGS172C, NGS372C, NGS612C

Brochures

NG082, NG162, NG172, NG362, NG372, NG602, NG612, NG642, NG942
NGS082, NGS162, NGS172, NGS362, NGS372, NGS602, NGS612, NGS642, NGS942

Service Information

LB160 Series, LB360 Series, LB600 Series, LB940 Series
LB160 Series, LB360 Series, LB600 Series, LB940 Series