Membrane air spring isolator Series BiAir®-ED-HE-MAX

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.
  • max. working height 509 mm
  • Load-independent natural frequency
  • Wear-resistant, low-maintenance air damping, easy to adjust from the outside
  • No transmission of structure borne noise
  • max. working height 509 mm
  • Load-independent natural frequency
  • Wear-resistant, low-maintenance air damping, easy to adjust from the outside
  • No transmission of structure borne noise

General product description

Description

Series BiAir®-ED-HE-MAX in cast aluminium

The BiAir® membrane air spring insulator is made of cast aluminium. The air space 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. In order to simultaneously achieve the greatest possible damping effect, the interior of the air spring is divided into two air chambers connected by an air hose (load and damping volume). An adjustable throttle valve is used to set the flow cross section to the desired damping effect from the outside. The friction in the air flow generated by the throttle valve can create a damping effect of up to 15 %.

Damage to the rolling membrane due to overpressure is virtually impossible through the use of additional safety valves or a mechanical piston stroke limit.

Schematic representation of the elements of a Bilz BiAir membrane air spring

Membrane air spring for effective vibration insulation

Technical Data and Variants

General information regarding selection and application of our BiAir® ED-HE-MAX 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.
  • Please select the load at an air pressure of 4 bar when selecting the air spring size.
  • Permissible temperature range: -20 °C to +80 °C
  • In addition to the standard solutions listed here we also offer numerous air springs with a larger stroke and lower natural frequency.
  • owder-coated in RAL similar to 7037 dusty grey
Technical drawing: legend of the dimensions BiAir ED-HE-MAX

Legend of dimensions BiAir ED-HE-MAX

Variant selection BiAir®-ED-HE-MAX in cast aluminium
Type
Item no.
Natural frequency vertical / horizontal Hz
Ø A mm
B mm
Ø C mm
Working height H BiAir-ED-HE-MAX mm
+/- Travel mm
max. load N at an air pressure of 4 bar
max. load N at an air pressure of 6 bar
Type
1
 
Item no.
50-0372
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
172
 
B mm
288
 
Ø C mm
200
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-2,5
 
max. load N at an air pressure of 4 bar
6.330
 
max. load N at an air pressure of 6 bar
9.500
 
Type
1,5
 
Item no.
50-0373
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
212
 
B mm
305
 
Ø C mm
230
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-3,5
 
max. load N at an air pressure of 4 bar
10.170
 
max. load N at an air pressure of 6 bar
15.260
 
Type
2
 
Item no.
50-0374
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
226
 
B mm
335
 
Ø C mm
260
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-2,5
 
max. load N at an air pressure of 4 bar
14.200
 
max. load N at an air pressure of 6 bar
21.300
 
Type
2,5
 
Item no.
50-0375
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
271
 
B mm
378
 
Ø C mm
300
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-3,0
 
max. load N at an air pressure of 4 bar
19.670
 
max. load N at an air pressure of 6 bar
29.500
 
Type
3
 
Item no.
50-0376
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
348
 
B mm
467
 
Ø C mm
382
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-2,5
 
max. load N at an air pressure of 4 bar
34.130
 
max. load N at an air pressure of 6 bar
51.200
 
Type
4
 
Item no.
50-0335
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
490
 
B mm
605
 
Ø C mm
530
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-2,75
 
max. load N at an air pressure of 4 bar
65.730
 
max. load N at an air pressure of 6 bar
98.600
 
Type
5*
 
Item no.
50-0073
 
Natural frequency vertical / horizontal Hz
1,2/2,8
 
Ø A mm
728
 
B mm
960
 
Ø C mm
880
 
Working height H BiAir-ED-HE-MAX mm
509
 
+/- Travel mm
+/-3,5
 
max. load N at an air pressure of 4 bar
155.730
 
max. load N at an air pressure of 6 bar
233.600
 

*unlacquered

Accessories BiAir®-ED-HE-MAX
in cast aluminium

BiAir®-ED-HE-MAX mechanical pneumatic level control MPN-LCV

Mechanical pneumatic level control MPN-LCV

The mechanical pneumatic level control MPN-LCV with our robust LCV proportional valves is a simple but effective solution to prevent tilting as a result of load changes. The target level is adjusted by turning the knurled adjustment ring and is maintained with an accuracy of ± 1/10 mm.
Item no. 61-0012

BiAir®-ED-HE-MAX mechanical pneumatic level control MPN-PVM

Mechanical pneumatic level control MPN-PVM

The mechanical pneumatic level control MPN-PVM with our robust PVM proportional valves is a simple but effective solution to prevent tilting as a result of load changes. The target level is adjusted by turning the knurled adjustment ring and is maintained with an accuracy of ± 1/100 mm.
Item no. 61-0010

BiAir®-ED-HE-MAX Electronic Pneumatic Position Control EPPC™

Electronic Pneumatic Position Control EPPC™

EPPC™ real-time level control for efficient vibration insulation of vibration sensitive, highly dynamic machines and strict requirements on positional accuracy and setting time

Extremely robust galvanised proportional valve. The reset accuracy is ± 1/10 mm

Solutions

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