Hopefuldave
Intergalactic pot-mender
- Messages
- 2,543
- Location
- The Shed of Danger, surrey, England
Got the water cooler pumping, bit worried that it's taking a lot of pressure to get much flow rate...
The torch is a WP18 and secondhand, on 8m (25 foot) hoses, pressure (if a really cheap old gauge is to be believed) and flow (approximate figures) are :
50 psi, 1.0 l/min deionised water only
60 psi, 1.2
70 psi (probably too much! Hoses aren't bulging and straining though...) 1.4 and the gauge popped out of the hose, water everywhere
I'm wondering if this is about right for the long hoses OR could the torch be scaled internally from having tap water run through it? (I know that's a Bad Idea, but it wasn't me who did it, if it were done). There is a small-bore inlet to the flow sensor I'm using, will probably try without that tomorrow (late finish tonight) and swap in one with a larger bore through if it proves to be an impediment.
As it's all copper/brass/bronze/plastics and PVC hosing I'm thinking it would be pretty safe to circulate some diluted phosphoric acid for half an hour like plumbers do to scaled heating systems to see whether the resistance to flow improves - am I heading for disaster?
Incidentally, the upturned pop bottle seems to be damping the diaphragm pump's pulses pretty well, a tiny bit of pulsing (more of a vibration, ooer Mrs!) can be felt in the cooler to welder hoses, none in the torch and its hoses, and it gives about 10 seconds of after-flow when the pump goes off
Dave H. (the other one)
The torch is a WP18 and secondhand, on 8m (25 foot) hoses, pressure (if a really cheap old gauge is to be believed) and flow (approximate figures) are :
50 psi, 1.0 l/min deionised water only
60 psi, 1.2
70 psi (probably too much! Hoses aren't bulging and straining though...) 1.4 and the gauge popped out of the hose, water everywhere
I'm wondering if this is about right for the long hoses OR could the torch be scaled internally from having tap water run through it? (I know that's a Bad Idea, but it wasn't me who did it, if it were done). There is a small-bore inlet to the flow sensor I'm using, will probably try without that tomorrow (late finish tonight) and swap in one with a larger bore through if it proves to be an impediment.
As it's all copper/brass/bronze/plastics and PVC hosing I'm thinking it would be pretty safe to circulate some diluted phosphoric acid for half an hour like plumbers do to scaled heating systems to see whether the resistance to flow improves - am I heading for disaster?
Incidentally, the upturned pop bottle seems to be damping the diaphragm pump's pulses pretty well, a tiny bit of pulsing (more of a vibration, ooer Mrs!) can be felt in the cooler to welder hoses, none in the torch and its hoses, and it gives about 10 seconds of after-flow when the pump goes off
Dave H. (the other one)