Model Number RL03S-D
Bootstrap Compressor • Installation and Operating Instructions
Midwest Pressure Systems, Inc.
RAV
Rev. 0
MPS
M I DW E ST
PRESSURE
SY S T E M S
MPS
M I D W E S T
PRESSURE
S YS TE M S
MPS
M I D W E S T
PRESSURE
SY S T E M S
MPS
M I D W E S T
PRESSURE
SY S T E M S
MPS
M ID WE ST
PR ESSURE
SYS T E MS
MPS
M I DW E ST
PRESSURE
SYS T E M S
MPS Logos
12/5/91
1/2" Square
3/4" Square
1" Square
1-1/4" Square
1-1/2" Square
2" Square
MPS
M ID WE ST
PR ESSURE
SYS T E MS
Mount the Model RL03S-D Bootstrap Compressor on a
horizontal surface. Other mounting orientations are not
recommended. The booster system vibrates while operating, so
use the four 1/2” mounting holes, shown in the diagram to the
right, to bolt it to a solid surface.
1
Connect your shop air line to the 1/4” FNPT air inlet filter on the
front of the booster. A shutoff valve can be installed upstream of
the filter for convenient removal of the system for maintenance.
The booster has a built-in discharge pressure regulator. Do not
install a supply pressure regulator. Lowering the supply pressure
reduces the efficiency of the system. The unit is permanently
lubricated.
Use of an inlet lubricator will void the
warranty. The maximum inlet pressure is 150 psig.
2
Attach discharge line to the 1/2” FNPT ball valve located in
front of the receiver tank.
If the application requires a
lubricator, make sure the lubricator is installed
downstream of the booster.
3
The discharge pressure regulator is set by the black, snap-
lock knob mounted on the top of the unit. Pull up on the
knob to unlock it. Adjust the knob by turning it clockwise for
a higher discharge pressure (up to a maximum of 240 psig),
or counterclockwise for a lower discharge pressure. Inlet
pressure is read on the gauge to the left hand side. The
second gauge indicates discharge pressure. Supply shop air
to the booster and it will start to operate. Set the regulator to
attain the desired discharge pressure, and push down on the
regulator knob until it “clicks” to lock the regulator on that
setting. The regulator is self-relieving. When the discharge
pressure setting on the regulator is reduced, the higher
pressure stored in the system will vent through the regulator
until pressure equilibrium is reached.
If the inlet pressure
is higher than 120 psig, it is possible to set the
regulator so the booster exceeds the maximum
discharge pressure of 240 psig. Do not operate the
booster under these conditions. It is designed to
operate continuously at a maximum discharge
pressure of 240 psig.
5
The Bootstrap Compressor will operate as long as there is
demand for high pressure air. When there is no demand, the
booster will “stall” at the pressure set by the booster’s discharge
regulator. The stalled condition consumes no energy and does
not damage the booster. The booster will start up automatically
when the pressure falls slightly as a result of demand for high
7
Mounting Bolt Pattern:
7.5”
6.5”
Inlet port
1/4” FNPT
Discharge port
1/2” FNPT
The accumulator tank has a 1/4” ball valve to drain condensate. A
drain line or automatic drain valve can be attached to this valve
when needed. Close the valve before starting booster.
4
The accumulator is rated for 350 psig and includes a relief valve
set for 250 psig.
This relief valve was selected to prevent
operation of the booster above its maximum
allowable discharge pressure of 240 psig.
8
For maximum high pressure air storage,Bootstrap Compressor’s
regulator to charge the accumulator to 240 psig. Set the
secondary regulator on the discharge line to the desired
discharge pressure. This allows for greater accumulator storage
capacity, and minimizes pressure fluctuations in the system.
Make sure that any downstream components are rated for the
accumulator pressure, or are protected by a relief valve in case
the secondary regulator fails.
6
250 psig
Pressure
Relief Valve
Secondary
Regulator
Midwest Pressure Systems, Inc.
850 Transport Drive, Valparaiso, IN 46383
Phone 219-462-0070 Fax 219-318-2277
