F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
4 L
UBRICATION
PAGE 4-29
Break-in Lube Rate
- The break-in lube rate should be approximately twice the recom-
mended daily rate (150% minimum); i.e. the break-in cycle time should be approximately
half the normal cycle time (67% max.) to increase lube rate. Break-in rate should be main-
tained for 200 hours of operation for new equipment, or when replacing packing and/or pis-
ton rings.
Lube Rate and Speed
- The recommended lube rates for break-in or normal operation, in
cycles per second (as stamped on the lubricator box information plate and in Lube sheets),
are calculated at maximum rated compressor speed (as stamped on the compressor infor-
mation plate). The lube rate is reduced with speed, (as compressor actual running speed is
reduced, cycle time increases to reduce lube rate):
(RPM
max
÷ RPM
actual
) x cycle time seconds from lube plate = cycle time seconds, at actual
running speed.
Or reference the “Lubrication sheets” in the Ariel "Parts Book" for the Cycle Time (seconds)
vs. RPM (compressor speed) Table at various running speeds for your compressor, at the
stated gas operating conditions and lubricant.
Special Lubricant Certification
- Special lubricant formulations are available from lubricant
suppliers for specific applications. Suppliers who will certify suitability of the formulation for
site conditions should provide appropriate documentation. Contact Ariel for verification of
warranty coverage.
Calculation Example
, recommended daily lube rate:
JGJ/2, with Pipeline Quality Natural Gas, and following cylinder bore diameters (actual bore
diameter as shown on cylinder data plate), and 1.5 inches (38.1 mm) diameter piston rod,
with mineral oil type lubricant:
13.00"J (330 mm) at 100 psi discharge pressure (6.89 bar). Table 4-9 factor = 1.
9.75"J-CE (248 mm) at 577 psi discharge pressure (39.8 bar), Crank End. Factor = 1.
5.125"J-HE (130 mm) at 1636 psi discharge pressure (112.8 bar), Head End. Factor
= 1.25.
T
ABLE
4-11 E
XAMPLE
C
YLINDER
& P
ACKING
L
UBE
C
ALCULATION
US pints per day; ppd
Cylinder Bore
Packing
Sub
1 x 13.00 in. x 0.4 ppd/in. = 5.2
2 x 1.5 in. x 0.4 ppd/in. = 1.2
6.4
1 x 9.75 in. x 0.4 ppd/in. = 3.9
2 x 1.5 in. x 0.4 ppd/in. = 1.2
5.1
1.25 x 5.125 in. x 0.4 ppd/in. = 2.6
N/A
2.6
Recommended Total, ppd =
14.1
(Liters per day; L/day)
Cylinder Bore
Packing
Sub
1 x 330 mm x 0.0074 L/day/mm = 2.4
2 x 38.1 mm x 0.0074 L/day/mm = 0.56 (3.0)
1 x 248 mm x 0.0074 L/day/mm = 1.8
2 x 38.1 mm x 0.0074 L/day/mm = 0.56 (2.4)
