Heavy Duty Balanced Opposed Compressors - Ariel Corporation

FOR MODELS: JGZ AND JGU SECTION 1 - DESIGN SPECIFICATIONS & DATA
Piston Ring, Packing Ring & Wearband Side Clearances
The standard side clearance for JGZ and JGU compressor piston rings, packing rings and
wearbands when new are shown in the following tables:
TABLE 1-6 PISTON RING SIDE CLEARANCE, INCHES (mm)
NOMINAL
WIDTH
ACTUAL GROOVE
WIDTH
5/16 (7.94) 0.312 to 0.314
(7.92 to 7.98)
3/8 (9.53) 0.375 to 0.377
(9.53 to 9.58)
1/2 (12.70) 0.500 to 0.502
(12.70 to 12.75)
5/8 (15.88) 0.625 to 0.627
(15.88 to 15.93)
3/4 (19.05) 0.750 to 0.752
(19.05 to 19.10)
TEFLON PEEK
0.006 to 0.010
(0.15 to 0.25)
0.007 to 0.013
(0.18 to 0.33)
0.009 to 0.015
(0.23 to 0.38)
0.011 to 0.016
(0.28 to 0.41)
0.013 to 0.020
(0.33 to 0.51)
0.005 to 0.008
(0.13 to 0.20)
0.005 to 0.008
(0.13 to 0.20)
0.005 to 0.008
(0.13 to 0.20)
0.006 to 0.009
(0.15 to 0.23)
0.008 to 0.011
(0.20 to 0.28)
TABLE 1-7 PACKING RING SIDE CLEARANCE, INCHES (mm)
ACTUAL
GROOVE
WIDTH
0.625 to 0.627
(15.86 to 15.93)
BTUU
CUU
0.025 to 0.031
(0.64 to 0.79)
UP P1U
0.019 to 0.023
(0.48 to 0.58)
TABLE 1-8 WEARBAND SIDE CLEARANCE, INCHES (mm)
0.019 to 0.022
(0.48 to 0.56)
ACTUAL GROOVE WIDTH TEFLON PEEK
2.000 to 2.002 (50.80 to 50.85) 0.024 to 0.034 (0.61 to 0.86) 0.014 to 0.018 (0.36 to 0.46)
3.000 to 3.003 (76.20 to 76.28) 0.036 to 0.048 (0.91 to 1.22) 0.021 to 0.025 (0.53 to 0.64)
PAGE 1 - 14 7/09