Machine Design article by Gary Rosengren provides details
By Tom Hoffman, CEO/President
In this blog episode, I’m reviewing some of the best parts of the content. I recommend the full article in Machine Design. Whet your appetite here, and then read the full article.
Ingress Protection is sometimes called International Protection. IP is a code rating in a system that standardizes the degree of protection against foreign objects, water (or other liquids) and other contaminants entering the enclosure housing of the linear actuator. Eliminating the risk of damage and personal injury is the objective of the standard.
The IP code provides a numeric rating. The higher the number, the greater the protection level. Rosengren endeavors to tell us how these codes apply to rod-type and rodless linear actuators (see both types on our extensive line card, here). He helps readers understand which ratings are most appropriate by application and environment.
Linear Actuator Environments
Rosengren tells us that linear actuators are easy to find in manufacturing, where they are used in dusty environments (think paper and corrugated material manufacturing). Rod-type actuators (see Figure 1) are very popular in this kind of situation. Tolomatic provides devices like rod wipers; for rodless actuators, look for cover strips that shield internal components. The full article provides more details, details about IP ratings and discusses other protection methods including positive pressure.
Many environments are far more than merely “dusty.” Extreme conditions attend wood- and metal-working, and call for higher IP ratings to achieve dust-tight operation that is also protected from low-pressure water jets. Tolomatic provisions include both rod wipers and rod seals, and the company cautions against use of rodless actuators unless custom protection is applied.
When liquid is present in the environment, the nature of the liquid determines the IP rating needed. Rosengren discusses the source, direction and volume of liquid, and gives examples. The article ties IP ratings to specific cases.
The full article provides more details and discusses other protection methods including positive pressure.
There’s a lot more, such as a rich discussion of food- and beverage-handling equipment in manufacturing. The article concludes with a full explanation and breakdown of the IP ratings code. By understanding the code, you’ll be in the best position to evaluate your specific needs and pick the right Tolomatic linear actuators. R.M. Hoffman customers will find the IP ratings in the downloadable datasheets at our website (sign-in required).