Model Number RL01SH
Air Pressure Booster System • 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
Operating Description
General Concerns
Midwest Pressure Systems, Inc. warrants the RL01SH Model air pressure booster system 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
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 RL01SH Model air
pressure booster system. The moving parts of the air pressure
booster system 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 wear parts are typically replaced 2 to 3 times
before a valve or regulator kit is required.
The shop air supply always fills Boost 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 RL01SH Model air
pressure booster system is not designed for inlet air pressures higher than
150 psig). A branch of the shop air supply flows through a pilot-activated
regulator, which reduces the pressure to the level required to attain the
desired air pressure booster system 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 B1. At the same time, the four-way valve opens Drive Chamber
B2 to exhaust. The pressure force exerted on the interconnected pistons
by the pressures in Drive Chamber B1 and Compression Chamber A1 is
sufficient to compress the air in Chamber A2 to a higher pressure (the
maximum discharge pressure attainable is four times the shop air supply
pressure). At the end of its travel, Piston 2 switches the four way valve,
which opens Drive Chamber B1 to exhaust, and pressurizes Drive
Chamber B2 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. The RL01SH Model
is designed to operate at a maximum discharge pressure of 280 psig.
Higher discharge pressures, though possible, can result in catastrophic
failure of the booster.
Feb. 25, 2016
Midwest Pressure Systems, Inc.
850 Transport Drive, Valparaiso, IN 46383
Phone 219-462-0070 Fax 219-318-2277
