Electric Globe Valve & Electric Actuator Working Principle

With the highest close-off pressure ratings, threaded or flanged models, and iron, brass, or stainless steel trim options – look to Schneider Electric for the best globe valve and actuator solution.

What is an Electric Globe Valve?

Electric Globe valves, like any other type of valve, need a power source to be operated. We are a valve and actuator company.

How does an Electric Globe Valve Work?

An Electric Globe valve is a valve with an electric actuator driving the stem up and down to drive the valve head so as to change the distance between the disc and the seat to achieve open and close control. It is mainly used to cut off or distribute the flow direction in the pipeline Is the chemical production in the use of the widest range of the cut-off valve. The Electric cut-off valve is mainly used in the control of water, steam, and Compressed air, but it is not suitable for the material with high viscosity and easy crystallization. In the use of the main way to judge the valve’s open and close state is to observe the stem exposed to cover height, in order to control the operation of the valve.

Electric Actuator Working Principle

The basic working principle of electric linear actuators is to convert the rotary motion into a linear motion. This conversion of motion is done with the help of a gearbox and a lead screw. These are the two most important electric linear actuator parts.

7 Advantages of Electric Globe Valve

The fluid resistance is small, and its resistance coefficient is equal to the length of the pipe section.
The utility model has the advantages of simple structure, small volume, and lightweight.
Tight and reliable, the gate valve sealing surface material is widely used plastic, and good sealing, in the vacuum system has also been widely used.
Easy to operate, open and close quickly, from full open to full close as long as the rotation of 90°, for long-distance control.
Maintenance is convenient, the gate valve structure is simple, the sealing ring is generally active, and disassembly and replacement are more convenient.
In full open or full closed, the gate and the sealing surface of the valve seat and media isolation, media through, will not cause the erosion of the valve sealing surface.
A wide range of applications, diameters from small to a few millimeters, large to a few meters, and from high vacuum to high pressure can be applied. Ball rotation 90 degrees, in the entrance, the exit should all show the spherical surface, thus cutting off the flow.

When Using Electric Globe Valve, The Following 7 Points Should Be Noted:

When the pipeline is used for the first time, there are a lot of dirty things in the interior. The stop valve can be slightly opened, the high-speed flow of the medium can be used to flush it away, and then it can be gently closed (not quickly closed or tightly closed to prevent the residual impurities from damaging the sealing surface) The Electric cut-off Valve is put into normal operation again.
The electric globe valve should be opened before the leakage check to determine whether there is no leakage defect valve, or stuffing box is no leakage defect.
When the electric cut-off valve is fully open, the handwheel should be reversed a little, so that the threads between the tight, so as not to lose damage.
Normally open electric cut-off valve, sealing surface may be sticky dirt, closed when also want to use the above method to wash clean, and then formally closed.
If the handwheel, handles damage or loss, should be immediately completed, and can not be replaced by a flexible plate hand, so as to avoid damage to the stem square, opening and closing are not good, resulting in accidents in production.
Some media, in the electric globe valve, closed after cooling, so that the valve contraction, the operator of the Electric Globe Valve should be closed again at an appropriate time so that the sealing surface does not leave a slit, otherwise, the media from the Slit high-speed flow, it is easy to erosion sealing surface.
When an electric globe valve is used in a medium-pressure steam pipeline, condensate should be removed before opening, then steam preheating is carried out, and the preheating pressure is kept between 0.2 MPA and 0.3 MPA The goal is to avoid sudden changes in temperature and pressure caused by seal damage, stable in a certain state can be adjusted to the required level of pressure.

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