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V-Rings and V-seals: How do they work?

In industrial facilities, V-rings and V-seals are common devices that help define the effectiveness of equipment, such as pumps and hydraulic devices. They are mounted on shafts to provide seals axially against counterfaces. They also rotate together with the shaft. In this post, we take a deeper look at v-rings and v-seals to demonstrate how they work and benefits of using them. 

The Design of V-Seals and V-Rings 

A V-ring or a V-seal is a one-piece rubber seal that is used to help keep dirt, water, and other materials from getting into the bearing housing. The most notable part of the seals is the lip that rotates together with the shaft when firmly holding the collar or counterface for dynamic sealing. As the shaft rotates, it helps block the contaminants and also prevents them from getting attached to the sealing lip. 

Depending on the location of the mounting, there are a number of ways that you can use to install a seal. However, it is important to factor in the design of the equipment to decide where to mount them. In the case of pumps, the seals are positioned either on the outer or inner part to prevent dirt from getting into housed sensitive parts. The images below demonstrate the two main points where V-seals of V-seals can be fixed. 

V-rings and V-seals are entirely elastomeric with no fabric or sheet metal reinforcement. Therefore, they are pretty easy to install. Most of them can be fitted without disassembly of the entire unit. Again, they are designed to be versatile, and one seal can work in a number of shafts. However, it will be a good idea to check for the type and size designed for your shaft. 

Types of V-Rings and V-Seals 

V-rings and seals are available in four main standards: Type A, Type S, Type L, and Type E. 

Type A and Type S V-rings are similar in that they feature a bevel back meant for pressure-less rod seals. However, Type A differs slightly in that it works well even for devices with a short mounting part. Unlike the first two, Type L is designed with a straight back, but it can be used even in shafts with short mounting sections. When it comes to the last, Type E, it features a straight back but is meant for heavy use, especially where large axial tolerances are needed. 

Note that the V-rings and V-seals work best when mounted on shafts running at speeds of less than 15 m/s. At very high speeds and temperatures, they are likely to get soft and come off. 

Benefits of Using V-Rings and V-Seals 

  • Simple: You require little prep for installing the seals. All you need to do is clean the shaft, apply some lubricant, and slide the V-ring or seal until it is pressed firmly against the counterface. 
  • Economical: The design of V-rings and seals allows them to fit and work with multiple shaft sizes. They also support a wide range of shaft misalignment
  • Versatile: V-rings and V-seals work very well in multiple applications, including dry actions, wet actions, and rotating shafts. 

As you can see, V-seals and V-rings play a big role in protecting impurities from getting into your devices. The impact is better product performance and durability. Make sure to also maintain all the equipment, from the motors to conveyor belt system, in top condition for better performance.