Membrane air springs
Series BiAir®-ED-AL in anodised aluminium

Low-frequency (vertical from 2.5 Hz) membrane air springs with precisely adjustable damping level for effective vibration isolation. Made of anodised aluminium especially for high demands on material properties.

  • 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 100 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 100 mm

General product description

Description BiAir®-ED-AL membrane air spring

Series BiAir®-ED-AL in anodised aluminium

The BiAir® membrane air spring insulator is made of turned 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 on the selection and application of our BiAir®-ED-AL 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.
  • Variants with lug for mounting valves (MPN) or displacement sensors are available with hose connections on the left (NL) or right (NR) on request.
Technical drawing with the legend for dimensions Bilz air spring BiAir ED-AL

Legend of dimensions BiAir ED-AL

Variant selection BiAir®-ED-AL
Type
Item no. without lug
Item no. NR
Item No. NL
Natural frequency vertical/horizontal Hz
A mm
B mm
Ø C mm
working height H mm
+/- Travel mm
max. load N / 4 bar*
max. load N / 6 bar*
Type
0,125
Item no. without lug
50-0002
Item no. NR
-
Item No. NL
-
Natural frequency vertical/horizontal Hz
3,0/3,5
A mm
75
B mm
-
Ø C mm
74
working height H mm
77
+/- Travel mm
+/- 2,0
max. load N / 4 bar*
390
max. load N / 6 bar*
580
Type
0,15
Item no. without lug
50-0005
Item no. NR
-
Item No. NL
-
Natural frequency vertical/horizontal Hz
3,0/3,5
A mm
75
B mm
-
Ø C mm
74
working height H mm
77
+/- Travel mm
+/- 2,0

max. load N / 4 bar*
670
max. load N / 6 bar*
1.000
Type
0,25
Item no. without lug
50-0129
Item no. NR
50-0135
Item No. NL
50-0136
Natural frequency vertical/horizontal Hz
3,0/3,5
A mm
120
B mm
182
Ø C mm
110
working height H mm
87
+/- Travel mm
+/- 2,5
max. load N / 4 bar*
1.130
max. load N / 6 bar*
1.700
Type
0,5
Item no. without lug
50-0130
Item no. NR
50-0137
Item No. NL
50-0138
Natural frequency vertical/horizontal Hz
2,5/2,8
A mm
130
B mm
198
Ø C mm
129
working height H mm
100
+/- Travel mm
+/- 2,5
max. load N / 4 bar*
2.670
max. load N / 6 bar*
4.000
Type
1
Item no. without lug
50-0131
Item no. NR
50-0139
Item No. NL
50-0140
Natural frequency vertical/horizontal Hz
2,5/2,8
A mm
200
B mm
275
Ø C mm
200
working height H mm
100
+/- Travel mm
+/- 2,5
max. load N / 4 bar*
6.330
max. load N / 6 bar*
9.500
Type
1,5
Item no. without lug
50-0146
Item no. NR
50-0147
Item No. NL
50-0147
Natural frequency vertical/horizontal Hz
2,5/2,8
A mm
230
B mm
305
Ø C mm
230
working height H mm
100
+/- Travel mm
+/- 3,5
max. load N / 4 bar*
10.170
max. load N / 6 bar*
15.260
Type
2
Item no. without lug
50-0133
Item no. NR
50-0141
Item No. NL
50-0141
Natural frequency vertical/horizontal Hz
2,5/2,8
A mm
260
B mm
350
Ø C mm
260
working height H mm
100
+/- Travel mm
+/- 2,5
max. load N / 4 bar*
14.200
max. load N / 6 bar*
21.300
Type
2,5
Item no. without lug
50-0134
Item no. NR
50-0142
Item No. NL
50-0142
Natural frequency vertical/horizontal Hz
2,5/2,8
A mm
300
B mm
390
Ø C mm
300
working height H mm
100
+/- Travel mm
+/- 3,0
max. load N / 4 bar*
19.670
max. load N / 6 bar*
29.500

*max. load N at an air pressure of 4/6 bar

Accessories BiAir®-ED-AL

BiAir® 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.

BiAir® 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.

BiAir® 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

Solutions

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