David Pascoe
07-23-2016, 11:34 AM
I've been using a vacuum press for about 5 years now with a Robinair 55000, 2 stage 5cfm pump without a reservoir or control switch. I finally burned up the pump by forgetting and leaving it run for hours. Trying to find a suitable vacuum control and/or timer switch so I don't do the same with the new pump I just bought. The system leaks at the bag hose connector (brass with bicycle tire valve) and thru the pump itself. Since it will not hold a vacuum for long, I need to cycle the pump on and off. The objective is to keep the pump from running continuously. (No, I can't find any way to stop the leakage).
I could go one of two ways:
1. Control the pump with a vacuum control switch that turns it on when vacuum falls to a certain point and shuts off when full vac. is reached. This would be a switch that repeatedly turns on/off as needed.
2. A simple timer where you dial in the time to shut off. This would be a manual solution where I'd have to restart it if I needed it to run longer.
I prefer option #1 as it is most convenient but surely will cost more. Can anyone advise me as to a particular brand/model of switches needed achieve these goals. I've already purchased two very inappropriate timers - a computerized programmable residential type that is horrendously complicated.. So far all the ones I've researched on the 'net have very inadequate descriptions, so that I really can't discern what I am buying. If you have a system set up for vacuum pressure cycling, I'd like to hear how you did it and what switches you used.
I could go one of two ways:
1. Control the pump with a vacuum control switch that turns it on when vacuum falls to a certain point and shuts off when full vac. is reached. This would be a switch that repeatedly turns on/off as needed.
2. A simple timer where you dial in the time to shut off. This would be a manual solution where I'd have to restart it if I needed it to run longer.
I prefer option #1 as it is most convenient but surely will cost more. Can anyone advise me as to a particular brand/model of switches needed achieve these goals. I've already purchased two very inappropriate timers - a computerized programmable residential type that is horrendously complicated.. So far all the ones I've researched on the 'net have very inadequate descriptions, so that I really can't discern what I am buying. If you have a system set up for vacuum pressure cycling, I'd like to hear how you did it and what switches you used.