So i’m days away from having my vacuum system setup as i think it should.
I made a little diagram to help me with the fittings, valves, etc.
What do you think about it?
I can upgrade the system later on, installing a vacuum reservoir.
I’m not sure if the vacuum switch setup (off at -100.0 kPa; on at -90.0 kPa) will be the best. I will have to test it first.
Happy to read your thoughts on this.
Looks good for a design. But everyone knows my thoughts on using a vacuum switch, and cycling the pump on and off 
Looks good to me. I will send you a pm shortly.
Do the non return vacuum valves have specific characteristics? Or is any automotive valve enough?
What if I do not know? If that were the case, would you then inform me?
i think riff is trying to say is that the power consumed by starting and stopping is more than a steady running. Easily debunked with a pencil and paper using ohms law…
Ah, like the myth that it is more efficient to leave a light turn one if you are coming back to the room in a couple of minutes?
Which was debunked on Myth Busters and shows that the start up energy consumption of a light bulb is roughly equivalent to the light remaining powered for 0.3 seconds. So if you can leave the room, do what you need to do and return in less than a quarter second, then leave the light powered.
Or more that vacuum pumps don’t like being turned on and off a bunch of times. The manufactures of our pumps recommend running the pump 30min before connecting a bag and 30 min after disconnecting it.
I have a KNF membrane pump that will run forever at 28"Hg but will not start under 20"Hg if stopped. That’s why using my controller with it will not work.
It takes a real power kick to get a pump under vacuum moving again. Not healthy for the coils in the long run.
if you want a controller, you will also need a waste valve, it seems.
And, wich kind of air filter is suitable for the job ???
Simple paper filters. What size pump do you have?