The advantages of flat gate valve
The flow resistance is small, and its flow resistance without shrinking is similar to that of a short tube. The flat gate valve with diversion hole can be directly used for pigging when installed on the pipeline. Since the gate slides on the two valve seat surfaces, the flat gate valve fluid can be applied to the medium with suspended particles, and the sealing surface of the flat gate valve is actually automatically positioned. The sealing surface of the valve seat will not be damaged by the thermal deformation of the valve body. Moreover, even if the valve is closed in a cold state, the thermal elongation of the valve stem will not overload the sealing surface. At the same time, when the valve is closed, the flat gate valve without diversion hole does not require the closing position of the gate to have a higher accuracy, so the electric flat valve can use the stroke to control the opening and closing position
The shortcomings of the flat gate valve
When the medium pressure is low, the sealing force of the metal sealing surface is not enough to achieve a satisfactory seal. On the contrary, when the medium pressure is high, if the sealing surface is not lubricated by system medium or external medium, frequent opening and closing may cause excessive wear of the sealing surface. Another shortcoming is that the circular gate that moves laterally on the circular flow channel is only sensitive to flow control when it is at 50% of the valve closed position. Moreover, the gate will vibrate violently when the high-speed and high-density media flow is interrupted. If the valve seat is made into a V-shaped port and guided tightly with the gate, it can also be used as a throttle.
Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.
Major products: Butterfly Valve, Ball Valve,Gate Valve, Check Valve, Globe Vavlve,Y-Strainers, Electric Acurator , Pneumatic Acurators .
Post time: Aug-13-2021