Frequently Asked Questions - Mechanical Questions

There are several types of lubricants available, and the best choice depends on the nature of your process. Your LIGHTNIN Sales Representative can help you select the right lubricant for your application.

Both are important, but in the majority of cases, compatibility with tank contents is more critical.

Selection of a seal is affected by the pressure and temperature in the tank, the speed of the mixer, lubrication options and the cleanability requirements specific to the product and mixing environment. Your LIGHTNIN Sales Representative will work with you to find the seal most appropriate for your application.

There are a variety of in-tank coupling designs. Each is used to facilitate the installation and maintenance of mechanical seals, shafts and impellers in closed tank environments. In some cases, an in-tank coupling is essential; in others, it is simply a convenience. Your LIGHTNIN Sales Representative can explain the benefits of an in-tank coupling in your application.

The types of impellers as well as the physical configuration of the mixer in the tank (off-bottom distance, spacing between impellers and the ratio of impeller diameter to tank diameter) are critical to successful up-pumping. Your local LIGHTNIN Sales Representative can help you implement up-pumping successfully.

The impeller should be located 1/2 to 2D (diameter) off bottom, depending on a variety of factors, including the solid suspension level, the viscosity and the low liquid mixing criteria.

Yes, LIGHTNIN can assist in the specification of geometry and internals suitable for optimal mixing.