Seals Varioseal® shaft seals: Egger’s modular concept even gets extended to the design of the pump shaft seal. A variety of standard and customised seals can be configured, depending on the fluids being transported and the safety requirements. Thanks to our Varioseal® system, various shaft sealing units can be interchanged without remachining. An overview of the Varioseal system: Explanation of the individual systems on the following pages. Advantages Flexibility in the choice of seal non-alloy steel shaft is sealed by a The Egger Varioseal® system standard shaft sleeve which is guarantees a high level of flexibility adapted to almost all types of seals. in the selection of the seal. Different seal systems can be Reduced spare parts stock and interchanged without remachining. simple maintenance A reduced spare parts stock and a Standard sealing chamber fast delivery are guaranteed, thanks Egger pumps have a standardised to the modular system. sealing chamber for mechanical seals in accordance with DIN EN Special designs 12756 (formerly DIN 24960) and for Special designs are available for gland packing in accordance with specific requirements. For example: DIN 3780. mechanical seals with integrated temperature control up to 350 °C Standard shaft sleeve (heating / cooling) or triple high The pump shaft is not in contact pressure mechanical seals up to with the pumped medium and hence 100 bar. no special material is required. The

The classic stuffing box with packing rings is still used today in certain branches of the industry. Its robustness and simplicity are appreciated, as well as the possibility to schedule the maintenance time in advance, as a failure is generally indicated over a longer period. Usually a permanent external sealing liquid is necessary to ensure a clean liquid film between the packing rings and the shaft sleeve for cooling and lubrication. A continuously visible small drip leak is a good sign that the outer gland packing ring is adequately lubricated and cooled on the atmosphere side and that the...

2c. Double mechanical seal in tandem arrangement Design with pressureless internal sealing liquid. Unlike the single design, double mechanical seals prevent any leakage to the atmosphere for a certain period, in the event that the primary seal breaks during operation. Two single mechanical seals are positioned in series as a double seal for the tandem version. The sealing space is lubricated with a pressureless internal sealing liquid (quench). The tandem version also guarantees protection from a brief dry run and is versatile as it can be used for media up to 80 °C. 2d. Double mechanical seal...

Hydrodynamic shaft seals collect the fluid behind the impeller and rotate it. As a result, a liquid ring is created, which seals the pump to the atmosphere. The Eurodyn® hydrodynamic shaft seal operates without friction nor wear and is mainly suited for continuous pump operation. Eurodyn® seals have a long service life, high system availability, low maintenance and are very reliable and safe. They are also suitable for media with a high solid concentration and viscosity. Similar to the gland packing rings, the hydrodynamic shaft seal is a seal system that has been known and used for a very long...