Rubber air spring insulator FAEBI®
Series FAEBI® in stainless steel
Rubber air spring insulator FAEBI® in stainless steel
Series FAEBI® HD
FAEBI®-HD series with adjustable damping
Series BiAir®-ED-AL in anodised aluminium
Low-frequency (vertical from 2.5 Hz) membrane air spring with precisely adjustable damping level for effective vibration isolation. Made of anodised aluminium especially for high demands on material properties.
Series BiAir®-ED in cast aluminium
Low-frequency (vertical 2.5 Hz) membrane air spring with precisely adjustable damping level for effective vibration isolation. Made of cast aluminium, universally applicable.
Series BiAir®-ED-HE in cast aluminium
Very low-frequency (vertical 1.7 Hz) membrane air spring with precisely adjustable degree of damping for effective vibration isolation. Made of cast aluminium, universally applicable.
Series BiAir®-ED-HE-MAX in cast aluminium
Low-frequency (vertical 1.2 Hz) membrane air spring with precisely adjustable degree of damping for effective vibration isolation. Made of cast aluminium, universally applicable.
The use of Bilz BiAir® air spring isolators with active level control maintains the correct level of machines or foundations. The level control and adjustment is entirely automatic.
The pressure in the air springs is appropriately adjusted by pressurising or venting in response to load changes. This keeps the isolating effect constant in all events.
Unlike steel springs air springs do not transmit structure borne sound.
Rubber air spring isolators for highly effective shock and vibration isolation
FAEBI® rubber air springs are used for the highly effective insulation of machines, apparatus and aggregates from shocks, vibrations and structure borne noise. The element comprises of a bellshaped rubber form made from high-grade elastomer.
The constructive design enables highly effective vertical vibration isolation without the disadvantage of large horizontal deflection. Overloading of the element due to a sudden pressure drop is virtually impossible.
On request, the system is also available with mechanical or electronic level control (see “Accessories” section). The base plate is equipped with an anti-slip plate to eliminate the need for floor anchoring. The FAEBI® rubber air spring is also available in a stainless steel version for use in outdoor areas (e.g. air-conditioning technology).
Applications for rubber springs
Perfectly suited for source insulation of fast running presses, forging hammers and other machines and aggregates with highly dynamic disturbance forces. Passive isolation of measuring and test equipment as well as highly accurate machine tools.
Shock and vibration isolation with rubber air springs
The natural frequency of the rubber air spring in the vertical direction is between 3 and 14 Hz depending on the static load. The maximum spring deflection in response to a pulse load is up to 15 mm depending on the type and size of the air spring.
Air pressure control
FAEBI® elements can be equipped with an air pressure control on request. The air pressure monitor will indicate if the air pressure falls below the required setpoint.
Bilz level control systems
The level control is a significant component to ensure the optimal function of an air spring system. The level control can correct load changes that cause undesired deflection of the air elements or inclination of the machine in a machine or system equipped with air springs.
Membrane air springs for effective vibration isolation and damping
With our BiAir® air spring isolator, the air volume is enclosed by a thin-walled, flexible and pressure-resistant rolling membrane. The piston sits on the membrane and is pressed into place by the air volume.
This design allows for highly effective vibration isolation.
Applications for membrane air springs
For highly effective receiver isolation of measuring and testing machines, inspection and production machines in the semiconductor industry, optical and electronic devices, laser systems, precision machining machines, as well as vehicle, engine and gearbox test benches etc.
How the membrane air springs work
In order to simultaneously achieve the highest degree of damping possible, the air space is divided into two chambers (load/damping volume) connected by a bypass. An adjustable throttle valve is used from the outside to set the flow cross-section in the connecting line of the bypass to the desired damping. A degree of damping of up to 15% is possible.
General information regarding selection and application of our BiAir® membrane air springs
- The maximum permissible movement amplitude in the horizontal plane is between approximately 1 to 2 mm depending on the size of the air spring.
- In addition to the standard solutions listed here we also offer numerous air springs with a larger stroke and lower natural frequency.
- Powder coated air springs are also available in other RAL colours on request.
- Permissible temperature range: -20 °C to +80 °C
- Damage to the rolling membrane due to overpressure is virtually impossible through the use of additional safety valves or a mechanical piston stroke limit.