Rubber air spring for highly effective isolation of machinery and subassemblies against shock and oscillation. The bell shaped component is made of high grade elastomer. The construction allows a highly effective isolation without the disadvantage of excessive horizontal deflection. It is impossible for the element to break down as a result of overloading or a sudden drop in pressure. To reduce vertical dampening, the component is available with additional attenuation, see FAEBI-HD below. The base plate is equipped with an anti-slip pad so there is no need to anchor the machine to the floor. Note: For outdoor use (e.g. isolation of a roof top air condition unit) the FAEBI can be supplied in a stainless steel and EPDM elastomer version.

BILZ Level Controller Systems
Level control is an important part of an optimally functioning air spring system. Level control can be utilized whenever load changes occur on rubber air spring isolated machines, causing an unwanted one-sided spring deflection of the air elements, e.g. tilting of the machine.
Isolation against Shock and Oscillation
Depending upon the static load, the natural frequency of the elements varies between 2, 5 6 Hz in the vertical direction. The ratio between vertical and horizontal natural frequency is 1 1, 2. Maximum spring deflection during impulse load is approximately 15 mm.

Range of Application
Excellently suited for active isolation of high speed power presses, forging hammers as well as other machines and equipment with high dynamic forces. Passive isolation of measuring and testing machines as well as high precision machine tools. Systems can also be supplied with an option of electronic or mechanical level control!

Assembly
The components are screwed on to the machine by means of predrilled holes. It is not necessary to anchor the machine to the floor. The machine is placed on deflated elements which are then inflated to a maximum of 56 bar via a standard valve. To level the machine, air can either be released or added. The maximum height adjustment available is 10 mm.
Control of Air Pressure
Upon request, FAEBI elements can be equipped with an air pressure monitor. This monitor will indicate if air pressure goes below the desired value.

The mechanical-pneumatic control valves are a simple yet effective solution. The level is constantly scanned by a plunger. The plunger position in transmitted to a slide valve. Depending on the slide valve position, pressure is either applied to the air spring or vented from the inside of the air spring. The level can be maintained at an accuracy 0.1mm.
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 & with a water trap to remove vapor and an air filter to remove dust andany foreign bodies from the air supply.

Rubber air spring for highly effective isolation of machinery and subassemblies against shock and oscillation. The bell shaped component is made of high grade elastomer. The construction allows a highly effective isolation without the disadvantage of excessive horizontal deflection. It is impossible for the element to break down as a result of overloading or a sudden drop in pressure. To reduce vertical dampening, the component is available with additional attenuation, see FAEBI-HD below. The base plate is equipped with an anti-slip pad so there is no need to anchor the machine to the floor. Note: For outdoor use (e.g. isolation of a roof top air condition unit) the FAEBI can be supplied in a stainless steel and EPDM elastomer version.Level control is an important part of an optimally functioning air spring system. Level control can be utilized whenever load changes occur on rubber air spring isolated machines, causing an unwanted one-sided spring deflection of the air elements, e.g. tilting of the machine.

MEMBRANE AIR SPRINGS
Wiith deep natural frequency & adjustable dampening (pat.) for vibration isolation of measuring & testing machines, optical and electronic equipment, laser machines, fine machining plant, vehicle & motor performance testers etc.

BiAir
Product Description
The Air Spring Isolator BiAir consists of either a steel or cast aluminum body whose air volume is enclosed by a thin-walled, flexible and pressure-resistant rolling diaphragm. The piston is seated on this diaphragm & is pushed into the air volume.

This design causes highly effective vibration isolation. In order to obtain as high a dampening effect as possible, the air space is split into two chambers (load and dampening volume) that are connected by an air tube. The amount of dampening can be easily changed by the adjustable valve located on the outside of the air spring. As the load on the air spring changes, air is forced through the bypass valve creating friction. This friction creates up to an 18% dampening effect. Additional safety valves protect the rolling diaphragm from getting damaged by over inflation.

Range of Application
Highly effective vibration isolation of sensitive measuring (CMM) and testing machines, fine machining plant, as well as optical and electronic equipment. Another important range of application is the vibration isolated foundation of vehicle, motor and other performance testers.
BiAir Air Spring isolators are extremely well suited for the isolation of foundations e.g. equivalent machine loads.
Air springs with higher max. loads as well as air springs with lower natural frequencies can be supplied upon request!

Advantages compared with conventional steel springs
BiAir Air Spring Isolators with level control are an active system. The machine foundation level consistency will always be preserved! Automatic leveling adjustment.

BILZ level controller systems
Level control is an important part of an optimally functioning air spring system. The automatic level controller can be utilized to overcome the problem associated with load changes in air spring isolated machines, which can result in tilting of the machine.
The height of the specific elements BiAir or FAEBI can be controlled by changing the air pressure in the air spring isolators. Quick inflation or deflation will hold the machines level even if their center of gravity keeps changing.

System components
Each system consists of 3 position sensors, 3 electro-pneumatic control valves, one control unit (digital computer logic), the pressure regulator and filter units. Even the most severe conditions are mastered by the electro-pneumatic 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 isolator is measured at a precision of up to 1/100 mm (10 microns) 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 equalization via the pneumatic control valves.