Hood
I am obsessed.
- Messages
- 16,936
- Location
- Carnoustie, Scotland
Thought I better start a new thread rather than continuing to post in others.
Getting a WP20 torch for Christmas so need to build a cooler.
Welded up a tank and machined fittings for a central heating pump. I was advised that it wouldn't work by @Richard. and he was right, not enough pressure for the small bore pipes of the torch. It cost me very little as I was given the pump, so only cost machining time for the fittings.
Was looking at getting a Procon type pump but they are huge when the motor is added and seemingly produce quite a bit of heat. Was also looking at the solenoid style pumps which are smaller but really require dampers so cost soon added up.
A couple of people mentioned the Chinese pumps used for caravans etc so I decided to try one as they are only £11 so no big loss if it didn't work.
Got the pump hooked up and it definitely worked giving me about 1.4 to 1.5l/min but I was unsure of the pressure as they are supposedly capable of 100PSI.
Today I machined up a connector so I could fit a pressure gauge so that I could monitor the pressure, the pumps have adjustment for pressure so I had wound it way down and increased it until I got a steady flow. The way the adjustment works on these pumps is when the set pressure is reached the motors power is cut until it drops then it starts again, this can give a pulsing type flow if set too low as the motor starts and stops constantly. I adjusted the pressure so that the motor was constantly running and it is about 58PSI (4 bar) so from what Richard has said that should be fine. The flow at that pressure is 1.3 l/min so that is plenty.
The tank and torch will get a decent test as I will likely be making a new tank up as its first job, will have to get some clean Alu first though
Getting a WP20 torch for Christmas so need to build a cooler.
Welded up a tank and machined fittings for a central heating pump. I was advised that it wouldn't work by @Richard. and he was right, not enough pressure for the small bore pipes of the torch. It cost me very little as I was given the pump, so only cost machining time for the fittings.
Was looking at getting a Procon type pump but they are huge when the motor is added and seemingly produce quite a bit of heat. Was also looking at the solenoid style pumps which are smaller but really require dampers so cost soon added up.
A couple of people mentioned the Chinese pumps used for caravans etc so I decided to try one as they are only £11 so no big loss if it didn't work.
Got the pump hooked up and it definitely worked giving me about 1.4 to 1.5l/min but I was unsure of the pressure as they are supposedly capable of 100PSI.
Today I machined up a connector so I could fit a pressure gauge so that I could monitor the pressure, the pumps have adjustment for pressure so I had wound it way down and increased it until I got a steady flow. The way the adjustment works on these pumps is when the set pressure is reached the motors power is cut until it drops then it starts again, this can give a pulsing type flow if set too low as the motor starts and stops constantly. I adjusted the pressure so that the motor was constantly running and it is about 58PSI (4 bar) so from what Richard has said that should be fine. The flow at that pressure is 1.3 l/min so that is plenty.
The tank and torch will get a decent test as I will likely be making a new tank up as its first job, will have to get some clean Alu first though