A valve actuator isa mechanical device that uses a power source to operate a valve. This power source can be electric, pneumatic (compressed air), or hydraulic (the flow of oil). There are two main types of actuators, one for each of the two main types of valves that require them. The...
One of the advantages of a Plast-O-Matic Air x Spring Actuated Ball Valve is that it can be converted fairly easily between one type or the other. Because the spring forces the actuator one way or the other, it is simply a matter of redirecting what the spring acts upon. With Series ...
Positioning of the actuator and control valve is fed back to the positioner through the feedback linkage. When the valve has reached the position demanded by the controller, the positioner stops the change in supply air pressure and holds the valve at the new position. This, in turn, corrects...
At the instant the external force (electricity) is removed, the magnetic field vanishes and a spring closes the valve. Common "actuated" industrial valves include air-actuated ball valves, motorized ball valves, and solenoid valves. A well-designed actuator is modular; it can be mounted on ...
The method used to join the actuator arm to the secondary device also depends on the design specifics of the system. If the full range of motion involved is in a straight line, a fixed joint may be used. Where the actuated mechanism moves through an arc or rotary outputs are involved, ...
Note:A tell-tale sign that the valve stem is broken, is that the valve handle will rotate much more easily. The handle rotates easily because the disc is no longer connected to the stem. 3D Model Components This 3D model contains all common parts of a globe valve, these include: ...
Valve stem, English name valve stem, is an important part of valve accessories. It is used for valve transmission, connected to the actuator or handle, and directly drives the valve core to move or rotate below to realize valve switching or adjustment.The valve stem is not only a moving ...
Finally, the handle or actuator is the part of the valve that is manipulated to control the valve’s position. Types of Ball Valves Ball valvescome in various designs, each suited to different needs. Full port ball valves feature a larger bore that matches the pipe diameter, minimizing flow...
Gate valves are a popular design of isolation valve, but how do they work and in what applications are they suitable to be used? Find out in our expert guide.
The air pressure on the diaphragm creates a force that overcomes the force of the spring and opens the valve. By rearranging the spring pneumatic supply, this type of actuator can fail-open or fail-closed when air pressure is lost. Pneumatic actuator in action Let’s look at a typical spri...