Frequently Asked Questions
BELLOWFLEX PTY LTD
Depending on the application there are a variety of materials available, please refer to our material list. If you are unsure of the material required, please advise us of the exact application, including surrounding Environment, Temperature and we can point you in the right direction.
A ring is a single piece of material. Two rings sewn together make up one Convolution. Convolutions sewn together make up the Bellow.
The shaft diameter is important as it allows us to determine the Internal and External Diameters of the Bellow.
Smooth shaft applications the inside Diameter of the Bellows can be 1 or 2mm larger than the shaft diameter. For screw jack applications you would need a larger clearance between the shaft and the inside diameter of the Bellow (generally we would allow 6mm) as the Bellow may get Caught on the thread of the screw hence damaging the Bellow or equipment.
For Horizontal applications or where the Internal Diameter of the Bellow needs to be maintained clear form the shaft, an Internal Bush is used to ensure this clearance is maintained.
In cases where the equipment is difficult to disassemble and time consuming, a zipper can be inserted. For a Zipper to be inserted, we would require a Flange width of the Convolution to be greater than 75mm.
In cases where the Bellow cannot create negative or positive pressure on the application a Breather Plug is necessary. Breather plugs allow moisture to escape.
Sewn Bellows are what is known as Shower Proof but not entirely Waterproof or Watertight, therefore they cannot be submerged in liquid medium nor are they able to maintain or hold liquid medium. Rain or Water Splash can be tolerated.
