The Difference between Electric Gate Valve and Electric Globe Valve(Part 1)

Simply put, the electric valve is to control the valve with an electric actuator to realize the opening and closing of the valve. It can be divided into two parts, the upper part is the electric actuator, and the lower part is the valve. The action torque is larger than that of the electric valve. The switching speed of the electric gate valve can be adjusted. The structure is simple and easy to maintain. Due to the cushioning characteristics of the gas itself, it is not easy to be damaged due to jamming during the operation. However, there must be a gas source and it controls the electric valve. Simply put, it is to use an electric actuator to control the valve to realize the opening and closing of the valve. It can be divided into two parts, the upper part is the electric actuator, and the lower part is the valve. The action distance is larger than that of the electric valve. The switching speed of the electric gate valve can be adjusted. The structure is simple and easy to maintain. Due to the cushioning characteristics of the gas itself, it is not easy to be damaged due to jamming during the operation. However, it must have a gas source and its control system More complicated than electric valves.

The electric globe valve and flanged gate valve are the same types of valve, composed of two parts: electric actuator or pneumatic actuator and globe valve. The difference is that its closing part is a valve body, and the valve body rotates around the centerline of the valve body to achieve A valve that opens and closes. The gate valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline.

The difference between electric gate valve and electric globe valve

1. Different sealing surfaces

When the gate valve is opened and closed, the valve core and the valve seat sealing surface always contact and rub each other, so the sealing surface is easy to wear, especially when the valve is close to the closed state, the pressure difference between the front and rear of the valve core is large, and the sealing surface wear is more serious; Once the valve disc of the globe valve is in an open state, there is no longer contact between its valve seat and the sealing surface of the valve disc, so its sealing surface mechanically wears less, but if the medium contains solid particles, it is easy to damage the sealing surface. The sealing surface of the gate valve has a certain self-sealing ability, and its valve core is in tight contact with the sealing surface of the valve seat by medium pressure to achieve tightness and leak-proofness.

The inclination of the valve core of the wedge gate valve is generally 3-6 degrees. When the valve core is forced to close excessively or the temperature changes greatly, it is easy to jam. Therefore, high temperature and high-pressure wedge gate valves have taken certain measures to prevent the valve core from jamming in the structure. The sealing surface of the globe valve must be closed by forced force to achieve the seal. Under the same caliber, working pressure and the same driving device, the driving torque of the globe valve is 2.5-3.5 times that of the gate valve. This point should be paid attention to when adjusting the torque control mechanism of the electric valve.

The sealing surfaces of the globe valve only touch each other when they are completely closed, and the relative sliding amount of the forcibly closed valve core and the sealing surface is very small, so the wear of the sealing surface is also very small. The wear of the sealing surface of the globe valve is mostly caused by debris before the valve core and the sealing surface, or because the closed state is not tight, causing high-speed scouring of the medium.

The above information is provided by the gate valve supplier.