As the pressure increased, eventually the container would burst. Before such a dangerous pressure is reached, a safety valve would open and automatically release the pressure, preventing the container from bursting. An example is the safety valve fitted to the lid of a domestic pressure cooker used in the kitchen. When the safety valve opened, steam would be released and warn the cook to turn heat on the kitchen stove down to a safer level.
Relese the pressure by pushing the schrader valve under the hood on the right side of engine.
pressure relief valve relief the excess pressure which is developed in the syatem, while pressure reducing valve reduces the pressure and supply it to the system.
no pressure release valve
A pressure valve is usually installed on water systems to prevent excess water pressure from destroying fixtures or other plumbing components. When the pressure exceeds the valve ratings the valve opens and releases water/pressure from the line.
Too much pressure or defective valve.
pressure-relief valve
The set pressure is the pressure at which a relief valve starts to open. When the valve is open and relieving, the pressure will be higher or lower than the set pressure, depending on the system and the valve design. That is the blow-off pressure.
A pressure regulator is a control valve that reduces the input pressure of a fluid to a desired value at its output.
The pressure would build inside the container and it could not run safely without damaging parts and it may blow up.
To regulate the pressure to a pre-determined amount.
it is the valve which reduce the pressure.
Pressure reducing valve reduces the pressure of fluid upto a predetermined pressure in this case downstream pressure will be obviously lower than upstream pressure but in case of pressure regulating valve it will regulate the pressure( either increase or decrease) depending on the requirement of system at that time.