ROBUSHI - mechanical seal

The design of the mechanical seal consists mainly of two parts: a movable and a fixed part. The fixed part is usually a ring that is fixed in the pump housing. The movable part is mounted on the shaft and is compressed by means of a spring to the stationary part. Sealing with a mechanical seal is achieved with the help of secondary seals (bellows, rubber rings) and friction pairs. When choosing a mechanical seal, it is important to choose the material of secondary seals and friction pairs.

Materials of mechanical mechanical seals of the Robushi shaft

Rubber material:
• NBR (nitrile butadiene rubber), temperature resistance -20 to +120 C
• EPDM (ethylene propylene rubber), temperature resistance -30 to +170 C
• Viton (fluoro rubber), temperature resistance -30 to +185 C
• PTFE (fluoroplast), temperature resistance -260 to +260C

Friction pairs
• SUS – metal (stainless steel)
• CAR – graphite
• CER – ceramics
• SIC – Silicon carbide
• TС – tungsten carbide

Visually, it is difficult to understand how these materials differ from each other (except fluoroplast), so it is easier to choose a material from taking into account the pumped medium and its temperature. Contact us, we will help you determine the material and choose the right mechanical seal for the Robushi pump.