Appendix B—Specifications for HG600/THG600 Series
B . Specifications
Operating Specifications
Cylinder Data
Description
Cylinder Code
A
B
C
D
E
F
Cylinder Bore in. (mm)
8.0 (203.2)
6.0 (152.4)
5.0 (127)
4.0 (101.6)
3.25 (82.6)
2.75 (69.9)
Maximum allowable working
pressure psia (bar g)
330 (22.8)
385 (26.5)
825 (56.9)
1,100 (75.8)
1,320 (91.0)
1,815 (125.1)
Piston ring radial thickness
(minimum) inches (mm)
0.215 (5.46)
0.155 (3.98)
0.155 (3.98)
0.082 (2.08)
0.082 (2.08)
0.090 (2.29)
NOTE: The minimum inlet pressure is atmospheric pressure. The maximum working pressure for horizontal compressors is determined by cylinder size. Single-
stage horizontal compressors begin with HG601 or THG601 and do not have an interstage section, thus no intermediate pressure. Two-stage units begin with
HG602 or THG602 and have an interstage section with an intermediate pressure at a level between that of the inlet and outlet pressures.
Frame Data
Stroke inches (mm)
3.0 (76.2)
Maximum gas rod load lb (kg.)
7,500 (3,401.9)
Maximum motor size hp (kg.)
75 (55.9)
Maximum discharge temp °F (°C)
1
350.6 (177)
Minimum temp °F (°C)
1
-20 (-28.9)
RPM range
400 - 1,200
THG/HG600 Series Clearances and Dimensions
Specification
Inches
Piston clearance
See piston clearance details
Clearance: connecting rod bearing to crankshaft journal
0.0013
0.0033
Clearance: wrist pin to wrist pin bushing (maximum)
2
0.001
Cylinder finish
16–32 RMS
Clearance: oil pump adapter shaft to bushing (maximum)
2
0.0036
Crankshaft end play (cold)
0.002
0.003
Flywheel runout at O.D. (maximum)
0.020
Clearance: crosshead to crosshead guide bore (maximum)
0.008
Crosshead guide bore finish in crankcase
32 RMS (limited number of small pits and scratches are
acceptable)
1
Inlet, intermediate, and discharge operating temperatures vary based on the gas being handled, the compression ratio, compressor speed, type of coolant,
and coolant flow rate. The type and size of intercoolers are also factors.
2
Dimensions for honing are included with new bushings (which must be installed, then honed).
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