SEALING SOLUTION FOR CARTRIDGE MIXER SEAL
Agitation reduces the time for the heat transfer to products, contributes to the reduction of process times, speeds up reactions, promotes product homogenisation, filtration, smoothing and drying.
Dimensional characteristics, motor power, pressure ranges and temperatures vary from process to process.
All the criteria and parameters mentioned above are necessary to determine the solution and position of the seal. Our experience in the solutions proposed guarantee the durability of your installations and optimisation of maintenance operations.
Industries and equipment
Agitation is a major operation in many areas such as pharmaceuticals, chemicals, food processing, petrochemicals, etc.
Industrial agitation equipment may be based on different designs (filters, dryers, reactors, etc.) depending on the industries, products and specifications. The equipment is made up of a drive, a bearing, one or several seals, a shaft associated to one or several propellers and a vessel.
• Industries : Pharmaceuticals, chemicals, food processing, cosmetics
• Equipment: industrial agitator, reactor, filter-drier, polymeriser, mixer, crusher
• Medium: powder, gas, steam, toxic fluid, non-toxic fluid
Position of the sealing system depending on the agitation
In order to best determine the most appropriate seal, the positioning of the seal in the vessel will precisely help define the best-adapted seal type and technology for optimum performance. The service and environmental parameters are also accounted for in the specification.
AGITATION AT VESSEL TOP
LATTY’s industrial sealing solutions proposed
Vertical shaft for reactors, dryers or crushers
• Single cartridge or two-component seal
• Single, dry mechanical seal, with or without friction seal
• Double mechanical seal with friction seal
• Double lubricated mechanical seal
Single, dry mechanical seal, with or without friction seal
Cartridge assembly with a single gas-cooled mechanical seal. The secondary sealing is provided with friction seal combined with a coated bearing surface. Lower height requirement, large number of options possible. The assembly is simplified with less control.
Double cartridge mechanical with friction seal
Despite its restriction in linear speed <2m/s , this double cartridge mechanical runs under nitrogen flush and can be included in different process phases. Its operation is constant whatever the variations in pressure, temperature or speed.
Double cartridge mechanical seal lubricated
Double cartridge mechanical assembly up to DIN 28138 with two mechanical seals that are lubricated by a barrier fluid. This assembly incorporates LATTY’s standard range of products. It has been technically optimised in order to provide a more cost-effective solution.
AGITATION AT VESSEL BOTTOM
LATTY’s industrial sealing solutions
Vertical shaft for dryers and mixers
• Double lubricated mechanical seal
• Stationary mechanical seal
• PECODY system
Stationary, lubricated or double cartridge mechanical seal
Cooling and lubrication will be secured in a permanent manner to guarantee the reliability and lifespan of the equipment. Options are proposed based on the industry and its specific requirements: electropolishing, polishing, reduction of retention areas. (sterile environments), installation of a sensor(ATEX), integration of geometric imperfections (axial, radial), cooling or heating flange, etc.
For intensive use, a alternative solution to a mechanical seal is possible with the implementation of the PECODY system
AGITATION AT VESSEL TOP OF FILTER-DRIER
LATTY’s industrial sealing solutions
Vertical shaft, axial displacement of the shaft
• Double, dry or lubricated, stationary mechanical seal
Double, stationary or dynamic mechanical seal
The filter-drier performs several operations including filtration. During filtration, the shaft slides through the sleeve of the mechanical seal. Sealing between the shaft and the sleeve will be secured by scrapers and profile gaskets or hydroformed bellows.
FILTER-DRIER AGITATION OR SIDE AGITATION
LATTY’s industrial sealing solutions
Horizontal shaft
• Single mechanical seal cartridge
• Double lubricated mechanical seal
• Double mechanical seal with friction seal
Double lubricated mechanical seal
This mechanical seal is particularly recommended for horizontal or lateral agitation subjected to regular mechanical or thermal constraints. These indications must be taken into consideration when drafting the specification. Options such as hydroformed bellows that allow for significant deformations are recommended depending on shaft deflections as well as radial and axial motions. The double-type technology ranges LATTYseal RU, RB 10000 or RB 24810 with friction seal are recommended when the speed is < 2m/s or where there is a secondary seal.
Approvals and construction codes
Materials compliant with: FDA, EC 1935/2004, ATEX
• DIN 28138 for mechanical seals
• DIN 28154 and 28159 for shafts
• DIN 28141 for flange connections
• DIN 28136 for vessels
