Brochure

Bulletin 110-10 – Page 5
OIL RESERVOIR - TYPE POR
The Sporlan Oil Reservoirs (POR‑2, 3 and 4) contain the oil that is
not within the crankcase, the oil separator, or in circulation. The
reservoirs have an inlet and an outlet service valve so it can be
isolated from the rest of the system. Or the oil supply from the oil
reservoir to the Oil Level Control can be interrupted for servicing.
When adding an Oil Reservoir to an existing system or replacing
an oil reservoir on an existing system, it should only be filled
to the top of the lower sightglass. As the system is placed into
operation, the oil level should be observed. If the oil level rises
above the upper sightglass, some oil should be drained from the
reservoir.
The level of oil should never be allowed to drop below the
bottom of the lower sightglass.
On new system start‑ups the reservoir should be filled to the top
of the upper sightglass. As the system runs, oil should be added
to maintain a level between the two sightglasses for the POR‑2.
For the POR‑3 and 4, the level should be somewhere between the
top and middle sightglasses. This procedure may require several
charges as the oil is absorbed in the refrigerant and coats the low
side tubing.
TYPE POR - SPECIFICATIONS
MODEL
NUMBER
TOTAL CAPACITY
Gallons (Liters)
‘A’ CAPACITY
Gallons (Liters)
‘B’ CAPACITY
Gallons (Liters)
NUMBER OF
SIGHTGLASSES
LENGTH
Inches (mm)
SHELL
DIAMETER
Inches (mm)
POR-2 2 (7.6)
3/4 (2.8)
3/4 (2.8) 2 18 (457)
6.0 (152)POR-3 3 (11.4) 1-1/2 (5.7) 3 23 (584)
POR-4 4 (15.1) 2-3/4 (10.4) 3 36 (914)
‘A’ capacity is the capacity to the first sightglass.
‘B’ capacity is the capacity between the two sightglasses for the POR-2 and the top and bottom sightglasses for the POR-3 and POR-4.
OIL DIFFERENTIAL CHECK VALVE – TYPES OCV-5,
OCV-10, OCV-20, OCV-30
The Sporlan Oil Differential Check Valve (OCV) is installed on
the 3/8” SAE fitting on the top of the Oil Reservoir. It allows pres‑
sure to be relieved from the reservoir to the suction as required
to maintain a pressure in the reservoir at a preset level above the
suction pressure. The pressure differential created by the OCV
assures oil flow from the reservoir to the Oil Level Control, pro‑
viding there is adequate oil in the reservoir.
The OCV will only relieve pressure from the reservoir in excess
of its fixed set point. Systems with fluctuating suction pressure,
as a result of compressor unloaders, staging or other suction line
controls, must be fitted with an OCV with a differential greater
than the suction pressure fluctuation. This assures oil flow from
the reservoir through the oil level control to the compressor
crankcase.
Sporlan offers OCVs with a 5, 10, 20, and 30 psi (0.34, 0.69, 1.4, and
2.1 bar) fixed differential setting with a Maximum Rated Pressure
(MRP) of 700 psi (48 bar). However, Sporlan recommends the
use of an OCV‑20 on all field built‑up applications. Equipment
manufacturers may, after extensive tests, employ an OCV with a
different pressure setting. Example: OCV‑5
OIL LEVEL CONTROLS
The purpose of the Sporlan
Oil Level Control is to regu‑
late the flow of oil to the
compres sor crankcase and
maintain a minimum oil
level as specified by the
compressor manufac turer
for a given application. The
Oil Level Control is adjust‑
able between 1/2 sight‑
glass and 1/4 sightglass at
any pressure differential
between 5 and 90 psi (0.34 and 6.2 bar). As the level of oil drops
in the compressor crankcase, the float of the Oil Level Control is
lowered and opens a needle valve. This allows oil to flow from the
oil reservoir to the compressor crankcase, see Figure 4.
OCV-20
All check valves have 3/8”
SAE connections.
All brass construction.
TYPE POR
FEATURES AND BENEFITS
Sightglass ports with float ball
indicators for oil level monitoring
3/8” male flare rotalock valves
shipped with oil reservoir allow for
easy adjustment when piping into
system
3/8” male flare vent port – for
connection to the suction line
Mounting studs and brackets
Powder coating passes 500 hour
ASTM salt spray
UL Listed SORT/SORT7 for the USA
and Canada with a Maximum Rated
Pressure (MRP) of 500 psi (34 bar).
UL Recognized under SA5460-
SFJQ2/SFJQ8 with a Maximum
Rated Pressure (MRP) of 650 psi
(45 bar).
OL-60FH
Inlet