Solenoid valve actuators use an electric current to open or close valves, and are used in remote or continuous control situations. They can control various types of valves, from simple quarter-turn ball valves to complex control valves. The actuator contains an electromagnet that moves a control arm or valve stem. In explosive or flammable environments, pneumatic actuators can be used instead.
A solenoid valve actuator is a device that can open or close a valve by applying an electric current to an electromagnet coil, causing a rod or control arm to move. Actuators are used wherever valves are controlled in remote locations or when continuous control of the valve is required. Valve actuators are operated by manual switches in a control room or by control systems connected to sensors in a manufacturing process. The term solenoid refers to the electric coil magnet, or electromagnet, used to control the valve.
Valves are used to control air, water and almost all other gases and liquids. They can be as simple as a quarter-turn ball valve used on a water line to complex control valves linked to software that monitors a chemical reaction. Whenever a valve needs to be controlled from another location, a solenoid valve actuator can be used.
The solenoid valve actuator contains an electromagnet that surrounds a control arm with a magnet attached to the end. Electrical energy sent to the electromagnet creates a magnetic field around the control arm. The control arm can move because the magnet is attracted or repelled by the electromagnet.
These controls may turn a separate valve stem or wheel, or may act directly as the stem. Normally a spring holds the valve stem closed until an electric field is applied and the valve opens. The amount the valve opens depends on the electrical current applied, and control software can be used to move the valve in small amounts.
Gate valves use a flat plate that opens and closes with a toothed shaft; the solenoid can control a valve wheel that operates the gate. A ball valve normally requires a quarter turn on or off and can be solenoid controlled. Globe valves use a valve stem inserted into a machined seat that can be controlled with the solenoid valve actuator.
Needle valves are used in equipment requiring smaller flow rates, using small needle-shaped valve stems controlled by a solenoid. Larger butterfly valves can be controlled to supply water to generators in dams, creating hydroelectric power. Similar valves can control cooling water for chemical processes. Wherever a valve needs to be controlled rather than simply turned on and off, a solenoid valve actuator can be used.
Electrical circuits can create problems in explosive environments or in the presence of flammable chemicals. Air pressure can be used to control valves in these environments. Not considered solenoids due to a power failure, pneumatic or pneumatic actuators can be controlled in a similar way to a solenoid valve actuator.
Protect your devices with Threat Protection by NordVPN
