For years, piston vibrators have been used effectively throughout a multitude of industries to help keep bulk materials flowing. They have applications in the power and petrochemical industries, aggregates and mining industries, and the food and beverage industries. Piston vibrators are found every day on chutes, bins, hoppers, pipes and silos where they are used to help keep products such as sand, coal, plastics, grains, minerals and chemicals from plugging, bridging and rat holing. By stopping these materials from plugging within silos, railcars, bins, hoppers and many other types of vessels, the piston vibrator has become a key part of most manufacturing processes.
A pneumatic piston vibrator utilizes compressed air to drive a piston back and forth within the cylinder of a vibrator housing. This action generates the necessary vibration to overcome stubborn material flow issues. In order to work effectively, the vibration generated by the vibrator needs to be transferred from the vibrator to the material vessel, thus creating a response that will the overcome the plugged material. The difficulty is in creating this response so that any material rat hole, bridge or sticking that has formed within the vessel is eliminated, and the material can again flow freely.
In order to ensure free material flow within the vessel, proper sizing, selection and application of the piston vibrator is important. With ten different sizes of piston vibrators available to pick from and three separate models available, selecting the correct NAVCO piston vibrator for the application can be a little daunting. To help narrow the selection process slightly, it is best to understand some of the differences between the three models of NAVCO piston vibrators available: