Cartridges & Mechanical Seals

89 Sector Double cartridge seal Single cartridge seal Auxiliary elements Wave spring seal Multispring seals Axial spring seals Bellows seals Food & Beverage • • • • • • • Pharmaceutical • • • • • Chemical • • • • • Water treatment • • • • • • Maritime • • • • • Sector Maritime Pumps installed on ships must be extremely reliable and durable. Use of different machines: cooling pumps, fire fighting pumps or boiler supply pumps, meaning that the types of mechanical seals used in this industry are quite diverse. The main applications are for: Within this scope, not only is it important to locate spare parts to make the repair, but it is also important to select the right materials for the contact surfaces and metal parts of the seal. It is essential to deter- mine a structure that permits easy mounting, increases the pump’s useful life and reduces maintenance costs. Applications Requirements or critical conditions of the application Type of seal recommended Sea water: → Multispring seal: Hastelloy ® C materials multispring seal (balanced) High salt concentration High pressure Sump pumps: → Single cartridge seal (split). • Cooling machinery • Firefighting systems. • Feeding boilers. • Pumping ballast water. A wide range of mechanical seal designs exist for this type of pumps, which operates in especially difficult conditions with high salt concentrations (this parameter varies, depending on the sea), at high pressures, etc. High salt concentration Complex assemblies → Single cartridge seal, axial spring seals: conical spring, wave spring seal and multispring seal.