Polyurethane bellows

Properties of polyurethane bellows

Polyurethane has the strength of plastic and the elasticity of rubber. Due to the elasticity of the material, polyurethane bellows are much more flexible than PTFE bellows. PU bellows have a higher tear resistance. This enables us to produce polyurethane bellows with a longer extended length.

Applications of polyurethane bellows

Polyurethane bellows are used in many applications in the machinery and equipment industry:

  • To compensate vibrations, motion and displacements between two connecting components;
  • To protect piston rods, linkages and other machine parts involving axial and in some cases radial motion;
  • In combination with check valves, bellows can be used to circulate or pump gases and liquids using volume changes.
Polyurethane bellows

Two types of polyurethane bellows

Polarttech offers two types of polyurethane bellows:

V-bellow The V-bellow has a longer extended length than the M-bellow, but is less resistant to pressure. The V-bellow has a long durability when used in low-pressure piping systems, that move continuously through expansion. This type bellow has the greatest flexibility and the shortest fitting dimension in relation to the extended length.
M-bellow The M-bellow can resist a higher pressure than the V-bellow. The M-bellow is suitable for higher pressures and vacuum applications in, for example, piping systems. This type of bellow has a thicker wall thickness. That makes the bellow more rigid than the V-bellow. In addition, the mounting length is longer and the M-bellow is less flexible than the V-bellow. M-bellows are often used to absorb light vibrations or movements.

Question? Enquiry?

We offer custom-made polyurethane and plastic solutions.

+31 13 530 3500 sales@polarttech.nl