Control valves
Valves are used to control the flow of liquid and work automatically. Their actuators manufactured in one of three types: electric, hydraulic or pneumatic. Pneumatic actuators operated with air pressure and have two types of pistons and diaphragms.
It is necessary for the control valve to work automatically because if it is opened and closed manually, the name of the control element no longer has the correct meaning for this valve. Regulation by valve control consists in the fact that control valves are able to accept the instructions. So that the desired pressure in the pipeline determined for the control valve.
The valve continuously and proportionally regulates the difference between the flow pressure and the defined pressure. The control valve opened or closed even further so that the passage pressure and the determined pressure are the same and their pressure difference is also zero.
