15-07-2015, 09:51 AM
Cully, that's the case any way, that's how they work.
Incoming main will be say 5bar > this then goes through a pressure reducer to bring it down to 3 bar.
The water passes through a non return valve which traps the water in the cylinder.
The water is then heated and the pressure will rise in the cylinder by around a bar
Of the pressure goes over 5 bar the relief valve sets off and Lets pressure out before the cylinder turns into a bomb.
The air pocket in the diaphragm is compressed when the water is pressurised and this allows the water pressure to be maintained when water is drawn off.
Now if there's no pressure then loads of pressure my guess is the diaphragm is f*cked and is not maintaining the constant pressure straight away and then the diaphragm frees off hence the burst of pressure
Incoming main will be say 5bar > this then goes through a pressure reducer to bring it down to 3 bar.
The water passes through a non return valve which traps the water in the cylinder.
The water is then heated and the pressure will rise in the cylinder by around a bar
Of the pressure goes over 5 bar the relief valve sets off and Lets pressure out before the cylinder turns into a bomb.
The air pocket in the diaphragm is compressed when the water is pressurised and this allows the water pressure to be maintained when water is drawn off.
Now if there's no pressure then loads of pressure my guess is the diaphragm is f*cked and is not maintaining the constant pressure straight away and then the diaphragm frees off hence the burst of pressure