Heavy Duty Balanced Opposed Compressors - Ariel Corporation

Section 3 - Maintenance For Models: JGH:E:K:T
Initial Maintenance
Comply with Ariel Packager Standards and the compressor Start Up Check List. Adhere to all items
before and after start-up. After running a new, relocated, reconfigured, or overhauled compressor for
24 hours, shut down, vent the gas system, and perform the following maintenance:
1. Perform a hot coupling alignment
check within 30 minutes of
0.012
shutdown; bar driver shaft to
packager recommendations.
0.010
To ensure parallel and concen-
0.008
tric drive train alignment, position
connected equipment so
0.006
the total indicator reading (TIR)
is as close to zero as possible
0.004
on the coupling hub faces and 0.002
outside diameters at normal
operating temperature. Do not
exceed 0.005 inches (0.13 mm)
on the face and outside diameter,
except for outside diameters
above 17 in. (43 cm) where the
0.000
0 10 20 30 40 50
Hub Diameter, in.
FIGURE 1 Angular Coupling-Hub Face Alignment TIR Limits
angular face TIR limit is 0° 1’ (0.0167°).
• Hub O.D. > 17 in. x 0.00029 = angular coupling-hub face TIR, in. max.
• Hub O.D. > 43 cm x 0.0029 = angular coupling-hub face TIR, mm max.)
Center the coupling between the driver and compressor. It must not thrust or force the crankshaft
against either thrust face.
For cold alignment, account for the difference in thermal
growth height between the compressor and driver. Table
1 lists compressor centerline height change based on 6.5
x 10-6 /°F (11.7 x 10-6 /°C) and a differential temperature of
100°F (55.6°C). Obtain driver thermal growth predictions
from the driver manufacturer.
2. At hot alignment check, adjust discharge bottle supports
and head end supports, if applicable.
NOTE: To avoid cylinder distortion, lift discharge bottles
only 0.003 to 0.005 inch using the supports.
3. Check fastener torque on gas nozzle flanges, valve caps,
cylinder heads, piston rod packing flanges, and crosshead
guide to frame bolting, if applicable. See Maintenance
and Repair Manual or Ariel document ER-63 for
correct torques. After the first week or 150 hours, recheck
fastener torques.
4. Repeat torque check after the first month or 650 hours; re-check fasteners that turn after the second
month or 1300 hours. If loosening persists, consult your packager or Ariel for probable cause
and recommended correction.
Daily Maintenance
Angular TIR Limit, in., max.
TABLE 1 Compressor Thermal
Height Growth Predictions
Frame
Model
Thermal Height
Growth
Inches (mm)
JGM:N:P:Q 0.006 (0.15)
JG:A:I 0.007 (0.18)
JGR:W:J 0.008 (0.20)
JGH:E:K:T 0.011 (0.28)
JGC:D 0.014 (0.36)
JGZ:U, KBZ:U 0.016 (0.41)
JGB:V 0.020 (0.51)
KBB:V 0.018 (0.46)
1. Log and trend the following:
• Operating RPM, gas pressure and temperatures - determine if the unit is operating within
design parameters and expectations.
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