How does a clampless candle design improve filter media fixation in FUNDABAC® plastic elements?
Ever since the introduction of the FUNDABAC® Filter various kinds of clamps have been applied to securely fix the filter flexible media to the FUNDABAC® filter element. The clamps come in various forms, such as plastic wedge rings, one way clamps in stainless steel and re-usable screw clamps in stainless steel, titanium and zirconium. Clearly, as with the materials of construction for the rest of the filtration system, the choice of clamping materials is dependent upon the properties of the materials being handled in the filter and the process conditions.
For applications like chlor-alkali, viscose and other processes where we employ our polypropylene (PP), polyvinylidenfluoride (PVDF) or polyphenylenesulfide (PPS) filter internals we have previously used polymeric PP, PVDF or PPS wedge rings or titanium or zirconium wire clamps. DrM is proud to announce the launch of a new clampless candle design, which will be offered in PP, PVDF and PPS.
With the introduction of the clampless design for our plastic filter elements, separate clamps become obsolete. Here, the filter media is fixed with a special screw mechanism that is part of the filter element.
This offers a number of advantages over the previous design:
• Smooth design: No cake deposit on the clamp
• Metal free
• No difference in thermal expansion
• No corrosion attack
• Suitable for metallic and plastic registers
• Suitable for a wide range of filter media
• Filter elements can be supplied with the filter media already assembled
The clampless candle is now being offered as a standard option at DrM.
Frequently Asked Questions
How was filter media traditionally fixed to FUNDABAC® filter elements?
Since the introduction of the FUNDABAC® filter, various kinds of clamps have been used to securely fix the flexible filter media to the filter element. These include plastic wedge rings, one-way stainless steel clamps, and re-usable screw clamps in stainless steel, titanium and zirconium. As with the rest of the filtration system, the choice of clamping material depends on the materials being handled and the process conditions.
What is the FUNDABAC® clampless candle design?
The clampless candle is a design for DrM’s plastic filter elements in which separate clamps become obsolete. Instead, the filter media is fixed with a special screw mechanism that is part of the filter element itself. It is offered in polypropylene (PP), polyvinylidene fluoride (PVDF) and polyphenylene sulfide (PPS).
What advantages does the clampless design offer?
The clampless design provides a smooth surface with no cake deposit on the clamp, is completely metal-free, and has no difference in thermal expansion and no corrosion attack. It is suitable for both metallic and plastic registers and a wide range of filter media, and filter elements can be supplied with the filter media already assembled.
Which applications benefit most from the clampless plastic design?
The clampless design is aimed at applications that use DrM’s plastic filter internals in PP, PVDF or PPS, such as chlor-alkali, viscose and other processes where metal-free, corrosion-resistant construction is important.
Is the clampless candle a standard option at DrM?
Yes. Following its launch, the clampless candle is now offered as a standard option at DrM for plastic filter elements in PP, PVDF and PPS.
