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Mechanical Metal Bellow Seals come in different configurations, and each variant has its advantages and disadvantages. Among the most common variants are component mechanical seals and cartridge mechanical seals.
CARTRIDGE VS. COMPONENT MECHANICAL SEAL
When selecting a mechanical seal type, pump users must consider the cost of installation, long term running costs, pump characteristics, and the anticipated operational conditions (heat, vibration, and pressure). Keep your technical staff in mind as well, because having a skilled technician on-hand for regular maintenance vs. having to outsource maintenance and repairs makes a significant difference.
These factors will determine whether a component seal is preferable to a cartridge seal.
WHAT IS A CARTRIDGE SEAL?
A cartridge mechanical seal is a completely enclosed seal system with preassembled components. Typically, this seal type is composed of a gland, sleeve, and other hardware that make pre-assembly possible.
Refer to our blog post about different mechanical seal types for a more exhaustive list.
Advantages of Cartridge Type Mechanical Seals
Higher functional security due to pre-assembled seal with fix axial settings. Eliminate measuring errors.
Eliminated the possibility of axial misplacement and resulting seal performance issues
Prevention of dirt entry or damaging of the seal faces
Reduced installation costs through reduced installation time = Reduced down times during maintenance
Potential to reduce the degree of pump disassembly for seal replacement
Cartridge units are easily repairable
Protection of customer shaft/shaft sleeve
No need for custom-made shafts to operate a balanced seal due to the internal shaft sleeve of the seal cartridge.
The benefits of selecting non-cartridge seals for your mechanical seal support systems include:-
Reduced expenses on initial seal purchase
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Reduced spares costs as the individual components can be stocked vs. the entire seal
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Superior adaptability to very small pumps
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