Viking O-Pro Seals

Product Description

Viking Pump’s innovative O-Pro® Seals use a series of O-rings to create a robust seal and lubrication chamber, all in one. The O-Pro® Barrier seal functions as both a seal and bracket bushing. The O-Pro® Guard seal offers a simple retrofit option.  O-Pro Seals have been successful on difficult to seal applications such as Chocolate, Asphalt, and Molasses.

O-Pro® Barrier seal replaces packing or mechanical seal by occupying the internal bracket cavity with a machined seal gland, utilizing O-rings to seal externally on the bracket and internally on the shaft. A combination of O-rings and lubricating fluid provide a robust seal. preventing process fluid from leaking out of the pump. O -Pro® Barrier design also contains lubrication between the shaft and bushing reducing wear.

O-Pro® Cartridge seal replaces packing or mechanical seal by using O-rings to seal externally on the bracket and internally on the shaft. The combination of O-rings and lubricating fluid provide a robust seal, keeping process fluid from leaking out of the pump. The O-Pro® Cartridge seal allows for an easy retrofit while addressing any need for stainless steel seal construction.

O-Pro® Guard seal replaces packing or mechanical seal by sealing between the bracket, sleeve & shaft surfaces with a series of O-rings. The series of O-rings and lubrication provide a robust seal for many applications. The stainless steel construction utilizes a sleeve that is secured to the shaft to address any shaft wear concerns to ensure superior performance.

O-Pro Application Success Story:

One of our customers struggled with intermittent mechanical seal failures on a Viking Abrasive Liquid Pump used to handle ink. We reviewed the application as well as the customer’s operation and maintenance procedures to determine the root cause of this problem. We noted the mechanical seal was being displaced by pressure fluctuations, causing the pump to leak and requiring expensive mechanical seal replacements.

A Viking O-Pro barrier seal was an ideal solution as it could not be displaced in the same manner while maintaining the seal behind the rotor, which was important for this abrasive liquid application. As an added benefit, maintenance would be more cost effective compared to replacing an entire mechanical seal because the O-Pro only requires new, inexpensive o-rings to rebuild it!  

We developed a new pump configuration for this application with the O-Pro Barrier seal, and a test pump was sent to the customer. This test pump was installed in the same service where a previous pump had experienced numerous problems, and after a year of service there were no seal failures. Due to this successful test, the customer has decided to switch to Viking Pumps with O-Pro Barrier seals for all of their ink pumps moving forward!