Tube Diffuser Assembly, Operating and Maintenance Instruction

Specifications
8 Replacing Tube Diffuser JetFlex TD 63/2
8.1 Replacing Membrane
If the inspections on a regular basis results in an exchange of membranes proceed as described below
(see following figures):
1. The diffuser should be cleaned with a high pressure water jet cleaner of sludge deposits, to
avoid an injury risk by possible slide.
2. Remove the stainless steel crimping clamps (9) by bending back the ear of the clamp with a
crimping tool or a thorn. Thereby the stress of the clamp is solved and the clamp can be pulled
off.
3. The membrane (1) is pulled carefully from the support tube (6). To avoid break or deformation
omit a strong mechanical load of the joints (4).
4. Cleaning of support tube (6) is mandatory.
5. The air release port (3) in the coloured joint must be oriented on top and below. In that case
the across flats (8) are oriented horizontally. For the exact alignment see Chapter 6.3.
6. The new membrane (1) has a larger and smaller unperforated area at both ends. The larger
unperforated area provides a check valve function (7) and must cover the air release port (3).
The perforated areas of the membrane (2) must be oriented on both sides, the unperforated
area between at the top and below.
7. After mounting the membrane and adjusting their position, fit stainless steel crimping clamps
(9) on about 6-7 mm from the end of membrane (see photo). Place the crimping ear of the
clamps on the upper side of the diffuser. The membrane must not be twisted or warped in
the area of the clamps, otherwise after crimping the clamps a proper sealing can not be guaranteed.
Compress the crimp clamp with a suitable tool (mechanical all purpose crimper or
pneumatic). To guarantee sufficient sealing of the membrane against the support tube the
gap should not more than approx. 1,5 - 2 mm / 0,06“ — 0,08“.
8. Check air tightness as described in Chapter 7.1.
8.2. Replacing Tube Diffuser
If the inspections on a regular basis results in an exchange of the complete diffuser proceed as
described below:
1. The diffuser should be cleaned with a high pressure water jet cleaner of sludge deposits to
avoid an injury risk by possible slide.
2. Unthread diffuser from lateral piping using 2 fork wrenches contacting at the across flats.
3. Corrosion damages (rust) are to be eliminated. Air purge or water flush cleaning is recommended
prior to diffuser installation to remove any internal debris that may have accumulated
in the header piping.
4. Clean sealing area at the lateral as well as double nipples.
5. Use new flat-gaskets.
6. Assemble diffuser as described in Chapter 6.3.
7. Check air tightness as described in Chapter 7.1.