Model Number RL03S
Bootstrap Compressor • Operation and Warranty
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
Compression
Chamber A1
Compression
Chamber A2
Drive
Chamber
B2
Drive
Chamber
B1
Piston 1
Piston 2
4-way
Valve
Switch
4-way
Valve
Switch
Pilot Signal to regulator
Built-in discharge regulator
Regulated drive air
Plant air
Exhaust air
Pilot signal to regulator
High pressure air Exhaust air
Regulated drive air
Please refer to the operating description on the right, and the
schematic above to gain an understanding of the design principles
and mechanical function of the Model RL03S-D Bootstrap
Compressor. The moving parts of the Bootstrap Compressor are
permanently lubricated with a multipurpose grease (except for the
check valves). Operation with a lubricator upstream voids the
warranty. If a lubricator is required, it should be installed on the
downstream (discharge) side. A well-maintained 5 micron inlet air
filter is required to maintain the warranty by ensuring that no dust
particles enter the unit and foul the seals, or cause premature wear
of the highly-polished seal surfaces. The wear parts in the booster
consist of check valves, springs and dynamic seals. These parts are
designed for 1800 miles of piston travel. The four-way valve, which
controls movement of the pistons, is a lapped, stainless steel valve
with no elastomeric seals subject to wear. Under normal conditions,
this valve will provide many years of operation. The discharge
regulator built into the center of the unit sees very little wear, and is
designed to provide many years of service under normal conditions.
The plant air stream always fills Compression Chambers A1 and A2
directly, through a set of check valves. These two chambers are
always pressurized to the maximum initial air pressure available
(the Model RL03S-D Bootstrap Compressor is not designed for
inlet air pressures higher than 150 psig). A branch of the plant air
stream flows through a pilot-activated regulator, which reduces the
pressure to the level required to attain the desired Bootstrap
Compressor discharge pressure (the discharge pressure is set
manually by adjusting the regulator handle). This regulated air
stream flows through a four-way valve which directs it to Drive
Chamber B2. At the same time, the four-way valve opens Drive
Chamber B1 to exhaust. The pressure force exerted on the
interconnected pistons by the pressures in Drive Chamber B2 and
Compression Chamber A1, is sufficient to compress the air in
Chamber A2 to a higher pressure (the maximum discharge pressure
attainable is two times the plant air pressure). At the end of its
travel, Piston 2 switches the four way valve, which opens Drive
Chamber B2 to exhaust, and pressurizes Drive Chamber B1 with
regulated drive air, thus reversing the direction of the interconnected
pistons, until Piston 1 switches the valve back to its original
position. The interconnected pistons shuttle back and forth
continuously, producing a high pressure air stream, determined by
the discharge pressure set on the built-in regulator. The Model
RL03S-D is designed to operate at a maximum discharge pressure
of 240 psig. Higher discharge pressures, though possible, can result
in catastrophic failure of the booster.
Operating Description
General Concerns
Midwest Pressure Systems, Inc. warrants the Model RL03S-D Bootstrap Compressor to be free of defects in material and workmanship
for a period of one year after purchase, except piston seals, rod seals, and check valves which are warranted for six months after purchase.
We will either repair or replace a failed unit returned by the customer. No other warranty is expressed or implied. Proof of the purchase
date is required. This warranty does not apply to equipment which has been abused, and is voided by use of a lubricator, or failure to use
a well-maintained inlet filter. Customer must obtain a return authorization number before shipping the unit to the factory.
WARRANTY
Midwest Pressure Systems, Inc.
850 Transport Drive, Valparaiso, IN 46383
Phone 219-462-0070 Fax 219-318-2277
