F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
4 L
UBRICATION
PAGE 4-13
FRAME OIL OPERATING CONDITIONS
Compressor Frame Lubricant
Ariel recommends for use in the compressor frame, an ISO 150 grade paraffinic mineral oil
that provides oxidation inhibition, rust and corrosion inhibition, and anti-wear properties. This
is commonly called R&O oil.
8
1
2
4
8
8
7
3
B
C
A
5
6
9
A1
A2
A3 A4 A8
A3
A5 A6
A7
F
Piping and
components
by Ariel
Piping and
components
by Packager
Typical Dry Sump Design (“Dry” Crankcase)
- From drive end of frame.
Packager Connection to
Compressor Driven Oil Pump
Install Check Valve (8) if
over 3 Ft. (0.9 m) verti-
cal run to Oil Sump (9)
Oil Connections (See Ariel Outline Drawing for Details)
A1 Packager Connection from Compressor Driven Oil Pump
A2 Packager Connection to Oil Filter
A3 Packager Connection - Oil from Compressor Crankcase
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. From
there, through Drilled Holes in the Connecting Rods to the
Crosshead Pins and Crosshead Bushings.
A5 Pressure Regulating Valve Return Connection to Crank-
case, when applicable on some models
A6 Filter Vent Return Connection to the Crankcase, when appli-
cable on some models
A7 Oil Tubing Connections from Frame Gallery Tube to Top &
Bottom of the Crosshead Guides to Lubricate Crossheads
A8 Compressor Crankcase Oil Drain
System Components
1.
Y - Strainer - Required (supplied unmounted by Ariel)
2.
Compressor Driven Oil Pump (w/ Safety Relief Valve -
used as a pressure regulating valve, or for some
models when a separate regulating valve (6) is pro-
vided, as a relief valve)
3.
Thermostatic Control Valve, 170°F (77°C) nominal rat-
ing - Required (available as an option from Ariel)
4.
Pre-Lube Oil Pump - Required (with oil heating circuit
when applicable)
5.
Oil Filter
6.
Pressure Regulating Valve (w/ Overflow Return to
Crankcase), when applicable for some models
7.
Oil Cooler - Required
8.
Check Valve
9.
Separate Lube Oil Reservoir (Oil Sump) - Required
Thermostatic con-
trol valve (3) config-
uration may vary
from this schematic,
depending on valve
size. In mixing
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 filter.
Valve connections
A-B-C are marked
on the valve.
F
IGURE
4-4 O
PTIONAL
D
RY
-S
UMP
F
RAME
L
UBE
O
IL
S
CHEMATIC
- T
YPICAL