Model Number RL01SH
Air Pressure Booster System • 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 RL01SH air pressure booster system on a
horizontal surface. Other mounting orientations are not
recommended. The booster system vibrates while operating.
Use the four 9/32” 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 1/4” FNPT port on the side of the
receiver tank.
If the application requires a lubricator,
make sure the lubricator is installed downstream of
the booster.
A filter should be installed to protect
downstream components from seal/booster wear particles.
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 or counterclockwise for a lower
discharge pressure. The upper gauge indicates the inlet
pressure. The lower gauge indicates the 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 140 psig, it is possible to
set the regulator so the booster exceeds the
maximum discharge pressure of 280 psig. Do not
operate the booster under these conditions. It is
designed to operate continuously at a maximum
discharge pressure of 280 psig.
5
The air pressure booster system 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 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 pressure air.
7
Mounting Bolt Pattern:
12.0”
3.0”
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 if
needed. Close the valve before starting booster.
4
The accumulator is rated for 300 psig and includes a relief valve
set for 300 psig to prevent operation of the booster above its
maximum allowable discharge pressure of 280 psig.
8
For more precise booster control, set the discharge regulator for
a higher pressure than required, and install a filter and secondary
regulator on the discharge line of the accumulator. This allows
for greater accumulator storage capacity, and minimizes pressure
fluctuations in the system. For maximum high pressure air
storage, air pressure booster systems are set to charge the
accumulator to the maximum pressure of two times the supply,
and the secondary regulator in the discharge line of the
accumulator is set at the desired, lower pressure. 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
Drain Valve
1/4” FNPT
Inlet port
1/4” FNPT
300 psig
Pressure
Relief Valve
Discharge
port
1/4” FNPT
Midwest Pressure Systems, Inc.
850 Transport Drive, Valparaiso, IN 46383
Phone 219-462-0070 Fax 219-318-2277
