Pump Jack Valves Animation https://www.youtube.com/watch?v=SFJFiyXTOa0
An example animation from the Faculty Innovation Center at UT Austin. http://fic.engr.utexas.edu
This operates just like an EMAS pump. - Archer C - 3 years ago http://akvopedia.org/wiki/EMAS_pump
https://www.youtube.com/watch?v=6rmmARoIvW4

