PTFE Expansion Bellows
CRP is the UK distributor for the Dr Schnabel range of PTFE expansion bellows. We carry in stock a wide range of standard sizes for immediate dispatch. Dr Schnabel high performance bellows have been designed not only theoretically using finite element analysis techniques but this has also been combined with rigorous practical tests in applications involving combined bellows movements to ensure long and reliable life.
Bellows are commonly used to reduce vibration, for example on the outlet of pumps, to compensate for thermal expansion in long pipe runs etc. To overcome minor piping misalignments and to reduce sound and vibration noise.
All bellows are PTFE, with epoxy coated carbon steel flanges as standard. Expansion joints can be supplied with Static Dissipating PTFE or with stainless steel flanges. For powder duties we recommend the fitment of an inner smooth bore PTFE sleeve to reduce product hold up in the convolutions. The PTFE membranes are manufactured from Paste extruded PTFE with accurately controlled wall thicknesses. Bellows sizes typically from ½” NB up to 100” NB are available.
The bellows are supplied with 3 tie rods and spacer tubes to prevent excessive axial movement and stainless steel outer support rings to maintain product integrity at elevate temperatures and pressures.
Wide Range of High performance Bellows
Fluroflex 0
Single convolution PTFE bellows for use in vacuum duty applications up to 200o C, without the need for expensive exotic material root rings.
Fluroflex 3
General purpose 3 convolution PTFE bellows stocked by CRP , they offer a good trade off between movement and pressure / temperature performance being a good ‘all rounder’. Up to 6”NB the bellows are full vacuum rated as standard, large sizes can be supplied with PTFE coated support rings to offer vacuum performance.
Fluroflex 1 to Fluroflex 6
Standard range of PTFE bellows having 1 – 6 convolutions encompassing the Fluoroflex 3.
Fluroflex 10, 16 & 25
Specialist bellows with stainless steel shrouded PTFE convolutions for use at high pressures typically up to 25 bar (with ASME 300 flanges) giving the same corrosion resistance of PTFE with the high pressure ratings of metallic bellows.
For further information on the Dr Schnabel range please contact our Sales Office on 01706 756 400 or enquiry@crp.co.uk