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FD Type Double Bellows Air Spring

FD Type Edge-wrapped plate integrated rubber air spring

Frequently Asked Questions

FD-Type Rubber Air Springs offer a range of benefits that make them highly suitable for industrial vibration isolation and load-bearing applications:

  1. Excellent Vibration Isolation
    The flexible rubber air chamber effectively absorbs and isolates both high- and low-frequency vibrations, reducing noise and protecting sensitive equipment.

  2. Adjustable Load and Height
    Air pressure inside the spring can be adjusted to accommodate different load conditions, making it ideal for dynamic systems such as HVAC units, compressors, and platforms.

  3. Modular Design with Movable Flange
    Each FD-type air spring is equipped with a movable flange, allowing the user to easily assemble it with an additional blind plate using bolts. This design makes installation, removal, and replacement of the rubber airbag extremely convenient—especially useful when only the rubber part is damaged.

  4. Long Service Life
    Made from high-strength, wear-resistant rubber (like neoprene), FD-Type air springs are built for thousands of compression cycles in harsh environments without loss of performance.

  5. Low Maintenance
    Unlike metal springs, FD air springs operate without metal-to-metal contact, requiring no lubrication and minimal maintenance over time.

  6. Compact and Lightweight
    The cylindrical design allows for easy integration into tight or limited spaces, while still delivering high load capacity.

The FD-Type air spring functions by utilizing a rubber airbag that compresses and expands to absorb shocks and vibrations. As a load is applied, the internal air pressure adjusts to match the weight, enabling the air spring to maintain a steady height and efficiently isolate vibrations from external sources. Its design incorporates sealed end plates, eliminating the need for additional components and ensuring easy installation. This construction provides superior vibration dampening and impact absorption, improving comfort and safety. These air springs are ideal for use in various machinery and vehicles, delivering reliable performance in diverse applications.

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The FD-Type Rubber Air Spring is used in a wide range of applications, including:

  • Mould separation machines (air cushions)
  • Roll leveling machines (airbags)
  • Three-dimensional vibration tables (air bladders)
  • Rubber vibration tables (air cushions)
  • Roller friction brake machines (air springs)
  • Conveyors (air pads)
  • Straightening machines (air springs)
  • Vehicle air suspension systems
  • Gate valve actuator air springs
  • Forming presses (air bladders)
  • Cable tensioners (airbags)
  • Pipe threading machines (air pads)
  • Tobacco machinery (airbags)
  • Analytical instruments (airbags)
  • Secondary lifting equipment (air bladders)
  • Missile transport equipment (air bladders)
  • Aircraft airbags
  • Trampolines (air cushions)
  • High-frequency vibration tables (air bladders)

This demonstrates the versatility of the FD-Type Rubber Air Spring across various industries and machinery types.

FD Type Double Bellows Air Spring Model List:

Model:FD 130/142


Maximum Load:756kg

Maximum Outer Diameter:150mm

Natural Outer Diameter:130mm

Minimum Compressed Height :72mm

Maximum Extended Height :162mm

The weight of the component :4.4kg

Model:FD 160/166

 

Maximum Load:1251kg

Maximum Outer Diameter:175mm

Natural Outer Diameter:160mm

Minimum Compressed Height :82mm

Maximum Extended Height :190mm

The weight of the component :2.35kg

Model:FD 168/132

 

Maximum Load:1281kg

Maximum Outer Diameter:185mm

Natural Outer Diameter:168mm

Minimum Compressed Height :72mm

Maximum Extended Height :151mm

The weight of the component :2.2kg

Model:FD 200/142


Maximum Load:1797kg

Maximum Outer Diameter:220mm

Natural Outer Diameter:200mm

Minimum Compressed Height :78mm

Maximum Extended Height :162mm

The weight of the component :3.1kg

Model:FD 230/214

 

Maximum Load:2941kg

Maximum Outer Diameter:255mm

Natural Outer Diameter:2230mm

Minimum Compressed Height :88mm

Maximum Extended Height :246mm

The weight of the component :4.1kg

Model:FD 235/152


Maximum Load:2493kg

Maximum Outer Diameter:250mm

Natural Outer Diameter:235mm

Minimum Compressed Height :76mm

Maximum Extended Height :174mm

The weight of the component :3.3kg

Model:FD 250/180


Maximum Load:2610kg

Maximum Outer Diameter:270mm

Natural Outer Diameter:250mm

Minimum Compressed Height :84mm

Maximum Extended Height :206mm

The weight of the component:4kg

Model:FD 252/163


Maximum Load:2632kg

Maximum Outer Diameter:275mm

Natural Outer Diameter:252mm

Minimum Compressed Height :80mm

Maximum Extended Height :238mm

The weight of the component :4.2kg

Model:FD 280/214

 
Maximum Load:4361kg

Maximum Outer Diameter:305mm

Natural Outer Diameter:280mm

Minimum Compressed Height :88mm

Maximum Extended Height :246mm

The weight of the component :5.6kg

Model:FD 290/265


Maximum Load:3479kg

Maximum Outer Diameter:320mm

Natural Outer Diameter:290mm

Minimum Compressed Height :90mm

Maximum Extended Height :303mm

The weight of the component :6.55kg

Model:FD 300/170


Maximum Load:4309kg

Maximum Outer Diameter:320mm

Natural Outer Diameter:300mm

Minimum Compressed Height :85mm

Maximum Extended Height :195mm

The weight of the component :5.35kg

Model:FD 310/214


Maximum Load:5270kg

Maximum Outer Diameter:330mm

Natural Outer Diameter:310mm

Minimum Compressed Height :88mm

Maximum Extended Height :245mm

The weight of the component:7kg

Model:FD 330/214


Maximum Load:5966kg

Maximum Outer Diameter:355mm

Natural Outer Diameter:330mm

Minimum Compressed Height :88mm

Maximum Extended Height :246mm

The weight of the component :7.8kg

Model:FD 330/254


Maximum Load:5762kg

Maximum Outer Diameter:355mm

Natural Outer Diameter:330mm

Minimum Compressed Height :90mm

Maximum Extended Height :295mm

The weight of the component :7.24kg

Model:FD 350/255


Maximum Load:5270kg

Maximum Outer Diameter:330mm

Natural Outer Diameter:310mm

Minimum Compressed Height :88mm

Maximum Extended Height :245mm

The weight of the component:7kg

Model:FD 360/214

 
Maximum Load:5966kg

Maximum Outer Diameter:355mm

Natural Outer Diameter:330mm

Minimum Compressed Height :88mm

Maximum Extended Height :246mm

The weight of the component :7.8kg

Model:FD 380/221

 

Maximum Load:5762kg

Maximum Outer Diameter:355mm

Natural Outer Diameter:330mm

Minimum Compressed Height :90mm

Maximum Extended Height :295mm

The weight of the component :7.24kg

Model:FD 350/255

 

Maximum Load:6381kg

Maximum Outer Diameter:380mm

Natural Outer Diameter:350mm

Minimum Compressed Height :90mm

Maximum Extended Height :295mm

The weight of the component :8.2kg

Model:FD 360/214

 

Maximum Load:5900kg

Maximum Outer Diameter:380mm

Natural Outer Diameter:360mm

Minimum Compressed Height :88mm

Maximum Extended Height :246mm

The weight of the component :7.9kg

Model:FD 380/221

 

Maximum Load:7697kg

Maximum Outer Diameter:405mm

Natural Outer Diameter:380mm

Minimum Compressed Height :90mm

Maximum Extended Height :255mm

The weight of the component :8.5kg

Model:FD 400/217

 

Maximum Load:8958kg

Maximum Outer Diameter:430mm

Natural Outer Diameter:400mm

Minimum Compressed Height :90mm

Maximum Extended Height :249mm

The weight of the component :11.1kg

Model:FD 400/255

 

Maximum Load:8254kg

Maximum Outer Diameter:430mm

Natural Outer Diameter:400mm

Minimum Compressed Height :90mm

Maximum Extended Height :295mm

The weight of the component :10.4kg

Model:FD 430/255

 

Maximum Load:9838kg

Maximum Outer Diameter:460mm

Natural Outer Diameter:430mm

Minimum Compressed Height :90mm

Maximum Extended Height :295mm

The weight of the component :10.2kg

Model:FD 480/217

 

Maximum Load:13528kg

Maximum Outer Diameter:510mm

Natural Outer Diameter:480mm

Minimum Compressed Height :90mm

Maximum Extended Height :249mm

The weight of the component :13.8kg

Model:FD 520/217

 

Maximum Load:14442kg

Maximum Outer Diameter:550mm

Natural Outer Diameter:520mm

Minimum Compressed Height :90mm

Maximum Extended Height :249mm

The weight of the component :14.5kg

Model:FD 580/214

 

Maximum Load:18191kg

Maximum Outer Diameter:600mm

Natural Outer Diameter:580mm

Minimum Compressed Height :88mm

Maximum Extended Height :246mm

The weight of the component :13.3kg

Model:FD 630/262

 

Maximum Load:22277kg

Maximum Outer Diameter:660mm

Natural Outer Diameter:620mm

Minimum Compressed Height :90mm

Maximum Extended Height :300mm

The weight of the component :20kg

Model:FD 680/262

 

Maximum Load:24914kg

Maximum Outer Diameter:710mm

Natural Outer Diameter:680mm

Minimum Compressed Height :90mm

Maximum Extended Height :302mm

The weight of the component :18.6kg