E Catalogue

The mechanical-pneumatic relief valves are a simple yet effective solution. The level is constantly scanned by a plunger. The plunger position is transmitted to a spool valve. Depending on the spool valve position, pressure is either applied to the air spring or vented from the inside of the air spring. The machine level can be maintained at an accur-acy ± 1/100 mm. Principally three control valves are used. The incoming air supply is conditioned with a pressure regulator to limit system pressure to a maximum of 6 bar, water trap to remove vapor and an air filter to remove dust and any foreign bodies from the air supply. BiAir ® mechanical-pneumatic positioner / controller Advantages Important advantages of the BILZ level control are: a high reset accuracy e.g. level accuracy of ± 1/100 mm extremely short reaction time (within the milli-second range) the general possibility of being able to optimally adapt (increase and reset) the speed of the system to the specific conditions (control curcuit) wear-resistant and sturdy relief valves simple and effective set-up operation System components Each system consists of 3 position sensors, 3 electro-pneumatical relief valves, one control unit (digital computer logic), the air-supply regulator and filter units. Even the most severe conditions are mastered by the electro-pneumatical positioner. It is used mainly where high reset precision and extremely short reaction times are required. Any deviation (difference between desired value and actual value) from the desired height (desired value) of the air spring insulators is measured at a precision of up to 1/100 mm accuracy by means of position sensors. In the control unit, these electronic signals will then be processed and the air spring elements will be inflated or deflated accordingly for level equalisation via the pneumatic relief valves. Control unit The control unit consists of a printed circuit board, containing the entire logic of the 3 control circuits, 3 air pressure displays for the air springs, adjusting screws for the adjustment of the machine, selection of the controller speed, and a switch to enable complete deflation of the air springs. The control unit can be supplied either as a 19 inch rack mount unit or completely enclosed within a cabinet. Software As an optional feature, a special software package is available. By means of this software, the adjustment and optimization of controlled conditions, the registration of adjustment parameters as well as error determination can be carried out via the serial interface (serial interface provided on the control unit). Furthermore, the integrated serial interface enables link-ups with available machine computers or systems to be insulated. A number of more complex system modes can be realized this way. with level controller system Membrane Air-Spring Insulator BiAir ® 26 BiAir ® electro-pneumatic positioner/controller BiAir ® MPN BiAir ® EPN