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D Series Air Bellows

DescriptionD Series Air Bellows

Series D Shock Absorbers and Actuators (DUNLOP)

Series D Shock Absorbers and Actuators (DUNLOP)

TEVEMA offers D Series air bellows in single, double, and triple convolution configurations, equivalent to Dunlop/Springride air bellows. Bead rings and bead plates are removable from the bellows, making them versatile for various applications. One of the key advantages is the ability to manufacture these air bellows using specialized elastomer compounds and steel grades to meet specific application needs.

While standard metal parts include anti-corrosion protection, bead plates and rings can also be produced from stainless steel, typically AISI-304, for enhanced durability in corrosive environments. For unique applications, other stainless steel grades, such as AISI-316L, are available upon request.

The rubber compounds used (e.g., Chloroprene, Butyl, EPDM, Nitrile) ensure the air bellows can adapt seamlessly to various environmental conditions. Each compound is designed to perform under specific temperature and chemical exposure scenarios. For example:

  • Nitrile (NBR): Excellent resistance to oils, fuels, ozone, and outdoor conditions. Operating range: -25 °C to +110 °C.
  • EPDM: Ideal for high temperatures, ozone, and outdoor use. Operating range: -20 °C to +115 °C.
  • Chloroprene (CR): Resistant to weathering and medium exposure to oils. Operating range: -20 °C to +110 °C.

Additional Advantages:

  • Dismountable Design: Allows easy assembly with top and bottom plates, featuring air inlet connections and threaded holes for fixation.
  • Compact Height: The bellows’ design supports low installation heights, suitable for compact applications.
  • Custom Pressure Capacities: Standard versions can operate at up to 8 bar, while four-ply constructions support up to 12 bar.

Good to know

  • Rubber bellows and bead rings are available separately.
  • To understand the types of end closures used for each bellows reference, the following image illustrates the fixation methods listed in the general D Series table for each model.

D Series Air Bellows single Convolution Models​

SINGLE CONVOLUTION
 GENERAL CHARACTERISTICS AS ACTUATOR AS ISOLATOR
Ø MAX. [mm]
Min. HEIGHT [mm]
 End closure characteristics
Stroke [mm]
 FORCE AT 7 BAR [KN]
Design HEIGHT [mm]
Natural FREQUENCY AT 6 BAR [HZ]
Type a [mm] d [mm] Min. HEIGHT Max. HEIGHT
80 50 1 36 78 20 3 1 60 4.6
120 45 2 93 110 45 8 1 70 3.75
165 50 3 127 152 50 10.1 4.6 90 3.08
“ “ 4 “ 154 “ “ “ “ “
215 50 4 156 184 70 18 7.2 105 2.72
260 50 4 181 210 85 26 10.1 120 2.57
310 55 4 232 260 85 41.2 11.5 125 2.52
378 50 4 283 310 115 67 24.9 130 2.46
410 60 4 283 310 130 70 29.5 140 2.16

D Series Air Bellows Double Convolution Models

DOUBLE CONVOLUTION
 GENERAL CHARACTERISTICS AS ACTUATOR AS ISOLATOR
Ø MAX. [mm]
Min. HEIGHT [mm]
 End closure characteristics
Stroke [mm]
 FORCE AT 7 BAR [KN]
Design HEIGHT [mm]
Natural FREQUENCY AT 6 BAR [HZ]
Type a [mm] d [mm] Min. HEIGHT Max. HEIGHT
80 65 1 36 78 45 2.4 0.6 90 3.57
120 65 2 93 110 80 7 2 130 2.66
165 75 3 127 152 115 12.8 1.7 162 2.48
“ “ 4 “ 154 “ “ “ “ “
215 75 4 156 184 150 19.5 6 210 1.85
260 75 4 181 210 195 27.1 6.6 220 1.83
310 75 4 232 260 200 43 4.8 225 1.77
340 75 4 232 260 215 55 12 305 1.42
378 75 4 283 310 235 69 21 250 1.72
410 75 4 283 310 265 73 21 285 1.58
580 90 5 470 498 310 180 70 300 1.5
700 100 5 470 498 400 248 105 345 1.21
“ “ “ “ “ “ “ “ “ “
“ “ “ “ “ “ “ “ “ “

D Series Air Bellows Triple Convolution Models

TRIPLE CONVOLUTION GENERAL CHARACTERISTICS AS ACTUATOR AS ISOLATOR
Ø MAX. [mm] Min. HEIGHT [mm] End closure characteristics Stroke [mm] FORCE AT 7 BAR [KN] Design HEIGHT [mm] Natural FREQUENCY AT 6 BAR [HZ]
Type a [mm] d [mm] Min. HEIGHT Max. HEIGHT
80 80 1 36 78 60 2.6 0.8
120 85 2 93 110 105 6.2 2.6
165 100 3 127 152 170 12.1 2.7
“ “ 4 “ 154 “ “ “
215 110 4 156 184 225 18.8 5.8
260 100 4 181 210 280 31 5.7
310 100 4 232 260 300 44.4 14
378 100 4 283 310 375 70.4 27.2
410 125 4 283 310 375 75 20

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