Brochure

Bulletin 110-10 – Page 7
DETERMINING PRESSURE
DIFFERENTIAL
The following information must be considered before selecting
an oil level control for a system. See Figure 1 on the low pressure
oil return system for pressure locations.
Common suction header pressure – psig / bar
Differential Check Valve setting (OCV) – psi / bar
Oil Reservoir pressure (sum of
A
and
B
) – psig / bar
Crankcase pressure (compressor on common
header) – psig / bar
Crankcase pressure (compressor on
independent suction - if applicable) – psig / bar
The first step is to determine the pressure differential require‑
ment of the oil level control. This can be determined on compres‑
sors with a common suction header by subtracting the pressure
in the compressor crankcase
D
from the Oil Reservoir pressure
C
. For a compressor with an independent suction, the differen‑
tial requirement is determined by subtracting crankcase pressure
E
from pressure
C
.
ADJUSTMENT
The oil level control is factory set 3‑1/2 turns clockwise from the
top stop. To set the oil level, remove the seal cap on top of the con‑
trol. Turn the adjustment stem clockwise to lower and counter‑
clockwise to raise. The proper adjustment can be determined from
Figure 5. The oil level is given in eighths of the sightglass at various
A
B
D
E
C
MODEL
NUMBER
OL-60CH OL-60FH OL-60HH-6 OL-60NH-2 OL-60XH
ADJUSTMENT
RANGE
5 - 90 psi
(0.34 - 6.2 bar)
Differential
5 - 90 psi
(0.34 - 6.2 bar)
Differential
5 - 90 psi
(0.34 - 6.2 bar)
Differential
5 - 90 psi
(0.34 - 6.2 bar)
Differential
5 - 90 psi
(0.34 - 6.2 bar)
Differential
FLANGE DESIGN
FOR COMPRESSOR
ATTACHMENT
3 bolt, 1-7/8” B.C.
(47.6 mm B.C.)
3 bolt, 1-7/8” B.C.
(47.6 mm B.C.)
3 bolt, 1-7/8” B.C.
(47.6 mm B.C.)
3 bolt, 1-7/8” B.C.
(47.6 mm B.C.)
3 bolt, 1-7/8” B.C.
(47.6 mm B.C.)
NUMBER OF ARMS
AND LENGTH
Two arms -
standard length
Two arms -
standard length
One arm -
standard length
Two arms -
standard length
Two arms -
short length
EQUALIZATION
FITTING
PLACEMENT OPTION
None
Yes - bottom of drill
hole at centerline of
sightglass
None
Yes - tting is 0.375”
(0.953 mm) above
standard location
Yes - bottom of drill
hole at centerline of
sightglass
NOTES: Model OL-60XH-1 is identical to OL-60XH but less equalization fitting.
All Sporlan oil level controls now incorporate the OL-60 design for product simplification. The OL-60 Series are designed to handle a large operating range
and replaces the OL-1 and 2 Series oil level controls.
differential pressure conditions. Make adjustment (if neces-
sary) prior to installing the control on the system.
The oil level control is designed to operate up to 9 turns. Under no
circumstance adjust beyond 9 turns down from the top stop or the
control may be damaged. With care a person can feel the top and
bottom stops. One of the symptoms of over‑adjustment of the oil
level control is a totally full sightglass.
Data obtained using POE lubricant at 75°F (24°C) with a one inch (25.4
mm) sightglass.
If a sudden load increase or system defrost causes a large amount of
oil to return through the suction line the control will not prevent the oil
level from rising above the control point.
7/8
3/4
5/8
1/2
3/8
1/4
1/8
OIL LEVEL, SIGHTGLASS
NUMBER OF TURNS
1234
OL-60
Top
Position
876
59
Factory
Setting
DIFFERENTIAL PRESSURE
5 psi (0.34 bar)
10 psi (0.69 bar)
20 psi (1.4 bar)
30 psi (2.1 bar)
40 psi (2.8 bar)
60 psi (4.1 bar)
70 psi (4.8 bar)
80 psi (5.5 bar)
90 psi (6.2 bar)
Figure 5