{"id":13270,"date":"2023-11-15T13:46:23","date_gmt":"2023-11-15T12:46:23","guid":{"rendered":"https:\/\/www.lidering.com\/pumping-rings-on-mechanical-seals\/"},"modified":"2023-11-15T13:46:23","modified_gmt":"2023-11-15T12:46:23","slug":"pumping-rings-on-mechanical-seals","status":"publish","type":"post","link":"https:\/\/www.lidering.com\/en\/pumping-rings-on-mechanical-seals\/","title":{"rendered":"Pumping rings on mechanical seals"},"content":{"rendered":"

Pump rings are elements that ensure the correct operation of a mechanical seal exposed to high temperatures.<\/p>\n

Temperature is a key factor to consider in the operation of sealing solutions.<\/span><\/p>\n

Depending on the temperature range in which our system operates, we must choose different designs of mechanical seals and different types of materials for their components.<\/span><\/p>\n

If you want to know more about how do high temperatures affect mechanical seals and how can pumping rings be helpful, watch out for this article.<\/span><\/p>\n

High temperature effects on mechanical seals<\/b><\/h2>\n

Applications that require working with substances at high temperatures are very common in the industrial sector.<\/span><\/p>\n

High temperatures have a direct effect on the elements that make up a mechanical seal. Among the elements affected by a high temperature, we find secondary joints such as O-rings, these being the most sensitive to temperature.<\/span><\/p>\n

When choosing the right O-ring for mechanical seals operating at high temperatures, we must choose resistant materials.<\/span><\/p>\n

For example, EPDM, EPDM Peroxide or Aflas\u00ae\u200d are the most suitable materials for hot water or water-based solutions up to temperatures that can reach 170 \u00baC.<\/span><\/p>\n

For temperatures with fluids such as mineral oils, joints made of FKM or FFKM can withstand temperatures up to 200 \u00baC.<\/span><\/p>\n

But high process temperatures not only affect the joints of a mechanical seal, another of the affected elements are the <\/span>seal faces.<\/b><\/p>\n

If the process fluids are at a temperature close to evaporation, it is very likely that when they come into contact with the mechanical seal they acquire the necessary temperature, to evaporate prematurely between the faces of the seal.<\/span><\/p>\n

This phenomenon would cause the mechanical seal to work dry and, consequently, if it is not prepared for it, it would end up damaging it.<\/span><\/p>\n

Finally, we must not forget that metal components are also affected by high temperatures. Metal elements such as springs, when exposed to high temperatures, may deform and end up not exerting the proper force for the proper functioning of the mechanical seal.<\/span><\/p>\n

Pumping rings as auxiliary systems in mechanical seals<\/b><\/h2>\n

Very often the process temperature of a mechanical seal is high. For this reason, solutions have been designed to solve the problems associated with higher temperatures than usual in mechanical seals.<\/span><\/p>\n

These solutions involve the integration of an element that increases the thermal dissipation capacity ensuring the proper operation of the mechanical seal. An example would be a pressurized secondary cooling circuit.<\/span><\/p>\n

\"Pumping<\/p>\n

We have to consider that not only the heat of the process is the responsible of the temperature, but also the following effects influence:<\/span><\/p>\n