what about a large reservoir that you could create a vacuum in which then connects to the smaller degasser through a valve. It would speed up the application of vacuum to the hot casting. Not too fast of course but easy to control I would think. you probably don't need a particularly hard vacuum so the increased time taken to get the whole rig as low as it goes may not be a problem. OR, have a series of hoses and plumbing so the vacuum in the reservoir can be applied to the degasser and then switch over to the pump direct on the degasser for the last bit.
Bookmarks