CRP Bellows - Key Features

Bellows flanges are available to all of the international piping standards including ASME Class 150 and 300 and DIN PN 6, 10 and 16.  As standard the flange connection drillings are drilled and tapped either UNC for ASME or Metric for DIN.  Flanges are painted in an ultra high temperature paint in a silver finish.  For the paint manufactures datasheet please click here. It is worth noting the internal flange profiling that assists the first convolution in minimising any stress generated by the flange.

PTFE Convolutions
The number of convolutions is key to the range of movement provided by the bellows.  However both pressure and vacuum performance are reduced as the number of convolutions increases.

Root Rings
Root rings serve to provide support for the PTFE which is a mechanically weak material especially when hot.  These sit at the base of each convolution.

Tie Rods
These prevent the bellows from exceeding their maximum allowed movements.  They arrive factory set at the maximum allowable extension as detailed on the data label.

Limit Sleeves

These prevent damage to the convolutions by preventing the bellows from being compressed below the minimum allowable axial length.

Data Labels
There are three or four data labels present on the bellows flanges to carry as much information about the bellows as practical.  However, more information is available in our catalogue, or by reference to CRP, quoting the part number and serial number references.

Contact Details

Corrosion Resistant Products Ltd
Todmorden Road
OL15 9EG

Phone: +44(0)1706 756400
Fax: +44(0)1706 379567