But after going into my local hobby shop was told that the servo would need to provide at least 20kg/cm to turn it. The servos he suggested would put me over budget. It would also end up cheaper for me to buy these which would also put me over budget.
How much pressure from pump when all valves closed??
It should supply a max of 0.8 Mpa or about 116PPI. The solenoids I purchased are rated at 0.8Mpa, so I am pushing them to the limit.
Is it your code? Turn off the pump when all valves closed?
The solenoids are N/C (Normally closed) with no power. I've connected the solenoids to a tap/faucet, opened the tap/faucet fully and the solenoids work ok.
Thank you for the link for the irrigation valves. I will look into how these work.
well that makes two of us, i am off devising a 'smart' standalone water dispenser ( for city water distribution points ) that's using 12v 1/2" valves for the on/off control, haven't yet put it on field , what's puzzling me more is what to switch to in case this 'solenoid valve' issues a leakage, spec'd at 0.02-0.8 mpa
some one advised to go for electric ball valve (12V) which shows some weird features when i went through the datasheet, like open/close times being too much (~10 secs) , with maximum of like few operating cycles in an hour which quite makes it unsuitable for 'public' dispenser - case , plus cost being too much high
The problem of using simple solenoid valves with irrigation water is trash in the valves. If the water is completely free of solid material of any size, the valves will work. The plastic valves may be suspect, but have been used in domestic washing machines for years with out problems.
If your plastic valve is leaking, then take it apart and determine why it is leaking and fix it.
The problem of using simple solenoid valves with irrigation water is trash in the valves. If the water is completely free of solid material of any size, the valves will work. The plastic valves may be suspect, but have been used in domestic washing machines for years with out problems.
The water being used at the moment is tap water, this is until I have it running correctly. I think the problem I'm having with the solenoid is the pressure rating on the pump or the solenoid is incorrect. Either the pump is creating too much pressure, the solenoid can't handle the pressure it's rated at or both.
With the ball valve I have purchased I can take off the lever. So, at the moment I'm printing some gears and thinking about using stepper motors to open and close the valve.
some one advised to go for electric ball valve (12V) which shows some weird features when i went through the datasheet, like open/close times being too much (~10 secs) , with maximum of like few operating cycles in an hour which quite makes it unsuitable for 'public' dispenser - case , plus cost being too much high
I don't know how reliable or quick the ball valve will be with a stepper motor. But if I get it working I'll let you know if you are interested.
Ppl39:
The water being used at the moment is tap water, this is until I have it running correctly. I think the problem I'm having with the solenoid is the pressure rating on the pump or the solenoid is incorrect. Either the pump is creating too much pressure, the solenoid can't handle the pressure it's rated at or both.
With the ball valve I have purchased I can take off the lever. So, at the moment I'm printing some gears and thinking about using stepper motors to open and close the valve.
I don't know how reliable or quick the ball valve will be with a stepper motor. But if I get it working I'll let you know if you are interested.
Did you actually connect the ball valve to the pump output? When turned off, did the pump stop when the pressure limit was reached?
Ppl39:
The water being used at the moment is tap water, this is until I have it running correctly. I think the problem I'm having with the solenoid is the pressure rating on the pump or the solenoid is incorrect. Either the pump is creating too much pressure, the solenoid can't handle the pressure it's rated at or both.
With the ball valve I have purchased I can take off the lever. So, at the moment I'm printing some gears and thinking about using stepper motors to open and close the valve.
I don't know how reliable or quick the ball valve will be with a stepper motor. But if I get it working I'll let you know if you are interested.