Tech Tips - Forget Hydraulics

Sponsored by Page 7 PNEUMATIC BOOSTERS Another Way to Get Hydraulic Power Combining an Air-Oil Tank with a pressure booster provides a convenient, low cost way of adding the control, rigidity, and power of hydraulics to an air powered machine. Fabco-Air Multi-Power® Boosters use basic shop air to raise the pressure of another gas or liquid. They are compact and versatile finding use in numerous applications such as clamping, shearing, pressing, crimping, bending, testing, and many more. Two considerations (1) When relatively small volumes of high-pressure fluid are called for intermittently, boosters show obvious advantages over continuously running hydraulic systems. (2) For applications where high pressure must be maintained for prolonged times, boosters are ideal. After the booster strokes, there is no further energy input required and no heat build up. A booster can be mounted in almost any convenient location, and most of its control valves are installed in the low-pressure circuit where lower cost components save costs over hydraulics. How They Work The input is shop air, or any compatible gas, up to 150 psi; the output can be oil, liquid, air, or gas pressurized to 500 psi maximum. Multiple pistons compress the oil or fluid in the output end of the booster. Check valves insure the direction of fluid flow. Sizing Boosters By selecting the proper combination of bore size, stroke, power factor (determined by number of pistons) and regulating the input air pressure, the exact output pressure and required volume can be achieved and maintained. Versatility Since it is a basic booster without controls built-in, it can be adapted and controlled to perform a wide variety of applications. Fabco-Air boosters are not limited to cylinder applications. They may be used wherever a small volume of high-pressure media is required. The BA Series is built for use on systems in which the input to the booster will be gravity fed (no pressure) fluid or atmospheric pressure gas. It requires a 4-way air valve for operation. Porting is provided on the booster for the multiple piston power stroke and single piston reset stroke. BA Series 2-Stage Pressure Booster Figure 7 - Function of 2-stage Pressure Booster