Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation
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FOR MODELS: JGZ AND JGU SECTION 1 - DESIGN SPECIFICATIONS & DATA<br />
TABLE 1-10 PISTON, PISTON RING & WEARBAND CLEARANCES - NON-PRC, (mm)<br />
PISTON TO CYLINDER<br />
CLEARANCE<br />
BORE (mm)<br />
INCHES<br />
(454) 17.875 (4.60 to 4.90) (4.55 to 5.46) (16.38) (14.53) (19.33) (1.12 to 1.45)<br />
(498) 19.625 (4.75 to 5.05) (5.99 to 6.81) (20.42) (15.95) (21.21) (1.27 to 1.60)<br />
(511) 20.125 (4.70 to 5.00) (6.15 to 6.96) (20.88) (16.36) (21.77) (1.27 to 1.60)<br />
(559) 22 (5.41 to 5.72) (6.71 to 7.72) (23.16) (17.88) (23.77) (1.50 to 1.83)<br />
(613) 24.125 (5.44 to 5.74) (7.36 to 8.38) (25.15) (19.61) (26.09) (1.42 to 1.75)<br />
(673) 26.5 (5.74 to 6.05) (8.13 to 9.14) (27.43) (21.54) (28.65) (1.47 to 1.80)<br />
a. For PEEK piston ring end gap values, multiply the table values by 0.3.<br />
Fastener Tightening Torque<br />
Listed in the following tables are fastener tightening torque values, required for proper<br />
assembly of an <strong>Ariel</strong> JGZ/JGU compressor. Refer to the section concerning a subject component<br />
for detailed assembly procedures.<br />
Threads are to be clean and free of burrs.<br />
Torque values are based on the use of petroleum type lubricants on the fastener threads<br />
and seating surfaces. Use lubricating oil or Lubriplate 630, except for main bearing-cap cap<br />
screws, compressor piston rod nuts, crosshead-balance lock nuts and crosshead threads,<br />
stainless steel fasteners and fasteners in forged steel cylinders which use “Never-Seez”,<br />
Regular Grade (by Bostik, www.bostik-us.com, do not substitute for this product), and<br />
except where Loctite is specified. Molybdenum disulfide lubricants and “Never-Seez” are not<br />
otherwise to be used for fastener lubrication, unless specified, or excessive stresses can<br />
result with the listed values.<br />
TABLE 1-11 FASTENER TIGHTENING VALUES<br />
FASTENER<br />
NOMINAL<br />
SIZE<br />
INCH – TPI<br />
TYPE<br />
TORQUE,<br />
LB X FT (N·m)<br />
Main Bearing-Cap - Cap Screw 1-3/8 – 6 12 Point - Grade 8 350 (475) + 60° Turn a<br />
Connecting Rod-Caps - Cap Screw 1-3/8 – 12 12 Point - Grade 8<br />
Torsional Vibration Detuner-Donut<br />
Cap Screw<br />
Crosshead Pin through Cap Screw -<br />
Lock Nut<br />
PISTON RING END GAPS -<br />
FILLED TEFLON a<br />
CLEARANCE NEW MAXIMUM<br />
WEAR BANDS NEW<br />
MINIMUM END<br />
GAP<br />
45° 70°<br />
RADIAL<br />
PROJECTION<br />
350 (475) + 110°<br />
Turn b<br />
1-1/8 – 12 12 Point - Grade 8 740 (1010)<br />
5/8 – 18 Hex - Prevailing 125 (169)<br />
PAGE 1 - 18 7/09
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