R12S
2Pages

Bootstrap Compressor 2:1 Ratio Air Pressure Booster With 12 Gallon Receiver Tank The Bootstrap Compressor is an air-driven, air pressure booster. It requires no electricity, cooling water, or air-line lubricator and is explosionproof. Shop air is fed to the inlet port through a filter, and is split into two streams inside the booster. One stream flows to the compressor portion of the unit and is boosted to higher pressure. The other stream drives the compressor portion, and is consumed during booster operation. The drive air stream is regulated to maintain the discharge pressure set by the external regulator handle. Drive air consumption is approximately 1/2 to 1 times the amount of pressureboosted air. For example, if 10 scfm of high pressure air is required, the Bootstrap Compressor will need 15-20 scfm of shop air, and 5-10 scfm of that air will be vented through an exhaust silencer. For a given shop air pressure, Model R12S can deliver high pressure air at any flowrate up to the maximum shown on the flow curves below. The pressure regulator enables the booster to adjust automatically to changes in high pressure air demand or shop air pressure. When there is no demand for high pressure air, the booster stalls at the discharge pressure set by the regulator and consumes no energy. When there is a need for high pressure air, the tank pressure drops which causes the booster to restart automatically. MODEL R12S FEATURES A. Inlet pressure gauge B. Built-in pressure regulator C. Discharge pressure gauge D. 1/2" FNPT inlet filter E. 235 psig ASME safety relief valve F. 12 gallon, 235 psig ASME tank G. 1/2" FNPT discharge port H. Exhaust silencer I. 1/4" FNPT condensate drain valve J. Four 1/2" diameter mounting holes Midwest Pressure Systems, Inc. 850 Transport Drive, Valparaiso, IN 46383 Phone 219-462-0070 2" Square MODEL R12S SPECIFICATIONS • Maximum 2 to 1 boost ratio • Capable of 100% duty cycle • Inlet pressure range of 15-150 psig • Discharge pressure range of 15-230 psig • Temperature range of 40-130˚F • Approximate weight of 60 pounds • Integral regulator controls discharge pressure

Model R12S Flowrate vs Supply and Discharge Pressure 240 Maximum Allowable Pressure of 230 psig 120 psig supply air Discharge Pressure in psig Flowrate in scfm Use the curves above to determine the Model R12S air pressure booster maximum discharge flowrate for a given set of operating conditions. In the example shown above, a maximum discharge pressure of 130 psig is desired and Follow the MPS 80 psiitsupply air is available.psi supply air 130 psi line until intersects with the 80 curve. Draw a vertical line from the intersection down to the bottom line to determine the maximum flowrate of...