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unclebilly unclebilly is online now
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Join Date: Nov 2003
Location: I'm 'out there...'
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So why are the asco valves needed? Couldn’t a simple vent be built with a diaphragm and a couple check valves?

I’m thinking control the speed of a dc motor with a pot (or cheap vfd on a 3 phase motor) and have a crank shaft with an adjustable throw to set the displacement.
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Old 03-17-2020, 11:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #39 (permalink)