The Träxler gas hood is equipped with strong mechanically machined flanges in the transition from gas hood to tank frame, curved discs are welded. An O-ring is used as gas-proof seal between gas hood and frame. This O-ring is inserted in a mechanically processed groove. The reinforcement of the ribs is calculated by using a load analysis per FEM Finite Element Method.
Gas hood and support flange are on top of one another parallel and level, form-fit and non-displaceable. They transfer the dynamic forces and vibrations of the mixer directly to the substructure.
The gas hood with the mixer can be uninstalled at any time. The impeller clearance in the draft tube pipe remains unchanged during the re-installation. It does not require any readjustment.
Defined sealing forces ensure reliable effect and a long life of the gas hood seal.
Träxler offers the better solutions
Common gas hoods are made of plate-shaped discs. Typically their flanges have the same low material thickness in the area between gas hood and frame. There is only one flat gasket as a seal between the gas hood and the digester tank frame.
Träxler, on the other hand, has solid flanges which, together with the rib reinforcements, absorb the high loads. The gas-tight seal between the gas hood and the frame is provided by an O-ring which is embedded in a mechanically machined groove.
The consequences in many of the previous solutions
A flat seal sits between the gas hoods and the frame of the digester tank. This doesn`t transfers the forces and vibrations directly from the gas hood to the digester tank construction. A swinging up of the mixer and gas hood is easily possible, e.g. in case of foreign bodies or twisted hairs, wipes and debris accumulation on the impeller.
After the gas hood will be removed, it is not possible to be easily reinstalled without any readjustment of the impeller clearance on the guying inside the digester tank.
If a common gas hood has a leak on the flat seal, the connector screws on the gas hood are usually further tightened. As a consequence, the impeller clearance may be reduced to the point that the mixer touches the draft tube pipe.
Common gas hood with flat seal
Träxler gas hood
Once installed, Träxler gas hoods prove economical during each necessary service. The great effort it takes to uninstall and re-install common gas hoods is not required with Träxler gas hoods. You can count on Träxler.
Träxler is specialized in individual gas hoods with perfected type of construction. Gas hoods are developed and built in-house together with all of its components. With in-house engineering, a complete mechanical production, which can also handle large components and on-site installation.