The Interpuls’ Long Life Pulsators are the same as the other interpuls designs but has an added felt filter  for heavy-duty working conditions. Building on the strengths of its simple, reliable, variable-speed alternating vacuum pulsator, Interpuls' redesigned “Dustop” felt air filter has large surface area for excellent filtration of even microscopic particles. The cover design gives perfect seal for best protection in dusty conditions. The LL90 pulsator is an alternating pulsator that has been used in parlors, on pipelines and on portable bucket systems by dairymen for decades. The robust design has proven to be very reliable and ease of use is unsurpassed by any other pulsator. Designed for operation from 10" to 15" Hg. And available in ratios of 50:50, 60:40 and 70:30. Speed is adjustable to a maximum of 120 pulsations per minute making them a great option for Cows and Goats alike.

Features:
Extra felt filter for dusty applications.
Adaptable to ANY system
Speed (Pulses per minute) is easily adjusted 
Ratio can be changed easily by changing a slider inside the pulsator
Low cost and no need for electronics make these the most cost effective pulsator available 

Unless otherwise requested by the customer, the Interpuls pulsator is shipped from the factory at a 60:40 ratio and 60 pulsations per minute. If you would like 70:30 or 50:50 just make a note at checkout and we will be happy to make the change for you.