Regarding the connection method and connection specifications of explosion-proof electric valves and pipelines, the design requirements of valve equipment for different occasions must also be considered when designing.
The methods of combining explosion-proof electric valves and pipelines are commonly used: threaded connection (including two types of external thread connection and internal thread connection), flange connection and ferrule connection. These three connection methods are detachable, and welding connections cannot be detached. The card sleeve connection is a new type of connection method developed recently, which has the characteristics of convenient use and reliable function.
The above-mentioned various connection methods have their own advantages and disadvantages, and can be selected according to the needs of the internship. For low-pressure and small-diameter valves, threaded connections can be selected; for high-pressure and large-diameter valves, flanged connections can be selected; for small-diameter pneumatic valves, ferrule connections can be selected; for valves that do not need to be disassembled often, welding connections can be selected This kind of connection has excellent sealing performance.
The transmission method for controlling explosion-proof electric valves is also an element that should be paid attention to when selecting a valve. Such as butterfly valves, there are multiple transmission methods: manual, gear (bevel gear, spur gear, etc.), pneumatic, electric and so on. The choice of transmission method depends on the actual situation of the internship. Hard sealed butterfly valves are generally controlled by turbine, pneumatic or electric. Assuming that the torque required to open and close the valve is small, a hand wheel and a handle can be used to directly drive it with human power. If the torque required to open and close the valve is large, gear transmission can be selected to achieve the purpose of saving labor. Regarding the degree of automation of long-distance operation or travelling systems, the use of electric drives is more appropriate. Of course, considering that the structure of the electric drive equipment is messy and expensive, manual operation is still the most basic transmission method for valves. [The above contents are organized and released for you by electric actuators ]
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