Mechanical shaft seals
Mechanical shaft seals provide a unique sealing system for rotating equipment in challenging environments where conventional seals that seal around the shaft or spindle by compression and the more or less permanent springback of the gasket material do not provide sufficient sealing in the most challenging applications or only maintain satisfactory sealing for a limited time.
Mechanical seals are often used here
Mechanical seals - or heavy duty seals - used in pumps, screw conveyors, agitators and mixers and are therefore found in various industries such as food processing, chemical and pharmaceutical processing, biogas, sludge and wastewater plants, as well as in equipment and machinery for heavy, particle-laden mineral extraction and material transportation.
Several types of mechanical seals
By choosing the right type and configuration, mechanical shaft seals can - even under the most demanding circumstances - prevent leakage of liquids or gases to the environment and ensure reliable operation and efficient production.
pusher seal
Pusher seals or carrier seals are a popular type of mechanical seal known for their robustness and damping capabilities.
They feature a spring in combination with movable secondary elastomer seals such as O-rings, making them ideal for use in areas with high pressure and high speeds.
Metal bellows seal
Metal bellows seals is another type of mechanical seal designed to handle extreme environments and temperature ranges.
They have no movable secondary seals and achieve their flexibility through edge-welded plates. Metal bellows seals are suitable for large axial movements, especially at high temperatures.
Component sealing
Component seals or rubber bellows seals consist of a loose rotating part and a loose stationary part, making them more complicated to install than cartridge seals.
Still, they are widely used in many industries and often the preferred type in OEM pumps.
Cartridge seal
Cartridge seals are designed to be easy to install. Unlike component seals, which consist of separate parts that need to be assembled when installing the seal, cartridge seals are delivered as a single unit that can be mounted directly on the shaft without additional adjustments.
The risk of installation errors is minimized, making the cartridge seal a popular choice in many industries.
Cartridge seals can be of different types, including single, double, and multi-spring designs, and made of different materials chosen for the specific application conditions.
agitator/mixer seal
Mixer, stirrer or agitator seals Ensures reliable and continuous operation in mixing and blending plants, sorting and filtration drums, etc. where raw materials and ingredients are mixed or raw materials are separated, dried, etc.
The design can handle large movements and shocks both axially and radially.
In addition to the types mentioned, mechanical shaft seals are sometimes also referred to as process sealing, spring seal, rotary seal, shaft seals or heavy duty seals.
We help you get the job done
Whether you are a manufacturer or in service and repair, we can help with an optimal solution for your project. We take pride in solid and solution-oriented advice, and with a strong product range based on several recognized manufacturers, you will never go in vain at Betech.
Product overview - Mechanical seals
Rubber bellows and component seals - LATTY
Rubber bellows seals and component seals rubber bellow seals - are recognized and preferred types of mechanical seals for OEM pumps.
Universal types for use in all types of pumps with standard shaft, not sensitive to shaft deflections.
Available in many material combinations and a wide range of dimensions.
Meets multiple approvals and standards.
Carrier seals - LATTY
Carrier seals pusher seals - is universal for most rotating applications including food production equipment. Some types are additionally designed to work with media containing solids.
The carrier type is independent of rotation direction and is available in a range of sizes and different material combinations. In some types, the steel spring is protected from the media.
For use in high pressure applications up to 25 bar and with a balanced carrier seal up to 40 bar.
Cartridge seals - LATTY
Cartridge seals cartridge seals - is a balanced seal type independent of direction of rotation and manufactured as single or double seals. Double cartridge seals have an integrated pump function that circulates cooling and lubricating fluid.
Available in different sizes and material combinations, cartridge seals are ideal for standardization and new development projects.
Maintenance and servicing is easily performed on this type of seal, making it possible to extend the lifetime. Cartridge seals are also suitable as a replacement for braided gaskets.
Stirring tools - LATTY
Agitator or agitator tool seals agitator/mixer seals - are mechanical shaft seals that are independent of direction of rotation and are manufactured as single or double seals. Available with or without bearings, they are suitable for top entry drives, bottom drives and side-mounted drives.
Optionally, a barrier fluid system can be connected for efficient cooling and continuous lubrication.
Ready for installation according to drawing and delivered as factory tested unit. Can be manufactured and delivered in different sizes.
Metal bellows seals - Flexaseal
Edge welded metal bellows seals - mechanical metal bellow seals - for both low and high temperatures (temperatures up to 425°C) and working pressures up to 20 bar.
This type of hydraulically balanced metal bellows seal is self-cleaning using centrifugal force and is therefore a good choice for slurry and other particulate media.
Cartridge seals - Flexaseal
Cartridge seals cartridge seals - from Flexaseal are available in different types: single and double cartridge, single or multi-spring solutions and metal bellows types.
In addition, combinations of soft/hard as well as hard/hard sealing surfaces are possible, including sealing surfaces with perflouro elastomers (FFKM).
API approved.
Split seals - Flexaseal
Style 85 split cartridge seals split cartridge seals - are extremely easy to install and significantly reduce downtime in challenging and time-consuming installations.
No need for measuring, special tools, shims or glue.
No other split design divides the cartridge seal kit into just two integrated parts and makes handling and installation as simple as this product range from American Flexaseal.
The only split seal that is fully assembled and pressure tested at the factory.
Cooling and lubrication systems - Flexaseal
Cooling/lubrication and barrier liquid supply systems are used in conjunction with dual cartridge seal configurations.
Get an overview - Download brochures
Sealing solutions for rotating equipment
Complete range of mechanical shaft seals (agitator and cartridge seals, pusher, split and bellow seals) and braided seals in high-end quality for both manufacturers (OEM) and service companies (MRO) - with experienced technical support.
LATTY main catalog - LATTY products from France fulfill every conceivable requirement from the design stage to testing and continuous production. It's the way LATTY has delivered reliability to industrial companies for more than a century. Here you get a complete range of both braided gaskets and mechanical seals for pumps, compressors, mixers and more.
LATTY assistance systems - LATTY has developed a range of auxiliary and safety systems to automatically control barrier circuits in double mechanical seals for applications in the chemical, pharmaceutical and food processing industries. The auxiliary systems keep the seal box pressurized and regulate the temperature of the barrier fluid.
OEM seals - With its experience in dynamic seals, French LATTY offers a range of products adapted to the maintenance and quick repair needs of your process pumps.
