F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
4 L
UBRICATION
PAGE 4-11
Cold Starting
If a compressor is exposed to cold ambient temperatures, the oil system must be designed
so the unit may be safely started with adequate oil flow to the journal bearings. Temperature
controlled cooler by-pass valves, oil heaters, cooler louvers and even buildings may be
needed to ensure successful operation.
1
2
4
8
8
7
3
B
C
A
5
6
A1
A2
A3 A4 A8
A5 A6
A7
F
9
10
A9
A9
Piping and
components
by Ariel
Piping and
components
by Packager
Typical Wet Sump Design
Oil Connections (See Ariel Outline Drawing for Details)
A1 Packager Connection from Oil Pump
A2 Packager Connection to Oil Filter
A3 Oil Connection from Compressor Crankcase (Oil Sump)
A4 Lube Oil Compressor-Inlet-Connection to Gallery Tube. Oil
Flows to the Crankshaft Main Bearings and through Drilled
holes in the Crankshaft to Connecting Rod Bearings, then
through Drilled Holes in the Connecting Rods to the Cross-
head Pins and Crosshead Bushings.
A5 Pressure Regulating Valve return Connection to Oil Sump,
when applicable.
A6 Filter Vent return Connection to the Oil Sump, when applica-
ble on some models
A7 Oil tubing connections from Frame Gallery Tube to top and
bottom of the Crosshead Guides to lubricate Crossheads
A8 Compressor Crankcase Oil Drain (Oil Sump Drain)
A9 Pre-Lube/Recirculation/Heater Connections (4)
System Components
1.
Y - Strainer
2.
Compressor Driven Oil Pump (w/ Safety Relief Valve -
used as a pressure regulating valve, or for models
with a separate regulating valve (6), as a relief valve)
3.
Thermostatic Control Valve, 170°F (77°C) nominal rat-
ing - Required (available as an purchase separately
from Ariel)
4.
Pre-Lube Oil Pump - Required (shown with Oil Heat-
ing Circuit, when applicable)
5.
Oil Filter
6.
Pressure Regulating Valve (with Overflow Return to
Oil Sump), when applicable.
7.
Oil Cooler - Required
8.
Check Valve
9.
3-Way Valve, when applicable for Heater Circuit
10. Heater (When Applicable)
Optional
Heater Circuit
Thermostatic control
valve (3) configuration
may vary from this
schematic, depending
on valve size. In mix-
ing mode, B connec-
tion is lube oil from
main oil pump with tee
connection to lube oil
cooler inlet, C is from
lube oil cooler outlet
and A is to main oil fil-
ter. Valve connections
A-B-C are marked on
the valve.
F
IGURE
4-3 S
TANDARD
F
RAME
L
UBE
O
IL
S
CHEMATIC
- T
YPICAL