The BV Series, like other ball vibrators, require lubrication. These rugged vibrators will withstand continuous operation at high temperatures up to 350º by maintaining constant low pressure at 5 to 10 PSI through the unit when not in operation. The easily exchangeable ball races meeker them easy to repair providing prolonged life at a small cost. The top air outlet port allows discharged air to be silenced with a muffler or piped aware from the area of operation if absolute cleanliness is required.