Are important in the industrial automation control system the electric ball valve actuators. Is based on the electric ball valve disc of this kind of mobile forms around the axis of rotation movement of the valve stem. The seat and disc change in his itinerary directly proportional relationship. Mainly used for truncated or on line in the medium, can also be used on regulation and control of fluid, is one of the industrial automation process control pipe pressure components. Electric ball valve selection requirements 1, is the control element, in the use of the fluid piping system, it is very extensive, its use is also very much, to control the flow, pressure, flow and so on, all have very good effect. Due to the electric ball valve quality, for the safety of the pipeline, has a great influence, so in choosing electric ball valves, surely must be in accordance with the process and the basis for selection. 2, clear his company's pipeline diameter, know the demand pick what diameter and connection method of the electric ball valve. 3, according to the demand of the pipeline, to conclude that some of the common electric ball valve parameters, such as emissions can flow resistance, and can make the seat hole size range and so on, these parameters if no right, electric ball valve control flow, will be discounted. 4, according to the working temperature of pipe, choose suitable raw materials, of course, pipeline pressure, are to be taken into consideration. Electric ball valve specifications of material quality: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8, 304). 、CF3( 304L) 、CF8M( 316). 、CF3M ( 316 l) , Ti nominal menstruation: (~ DN350 nominal pressure: PN1. 6 ~ 25 mpa applicable temperature: - Drive mode: 46 ℃ ~ 500 ℃ electric types are: the electric ball valve floating ball valve, the fixed ball ball valve, ball valve, v-shaped ball valve, three-way ball valve, stainless steel ball valves, forged steel ball valve, sulfur discharge ball valve, ball valve, three-way ball Industrial Valves, pneumatic ball valves, electric ball valves, card sets of ball valve, welding ball valve, flanged ball valves, threaded ball valve. Floating ball: the ball is floating ball valve, under the effect of medium pressure, the fitness ball produce certain displacement and compression at the outlet seal surface, guarantee the outlet seal. Floating ball ball valve has simple structure, good sealing, but all spheres of work under medium load to export sealing ring, so want to consider to seal material can withstand the working load of sphere medium, under high pressure shock, sphere migration may occur. In this structure, is generally used in low pressure ball valve. : fixed ball ball valve ball is fixed, does not produce mobile after compression. Fixed ball valves have a floating ball valve seat, the medium pressure, mobile seat, make the seal compression on the ball, to ensure the seal. Usually mounted on the upper and lower shaft with ball bearing, the operating torque is small, suitable for high pressure and large diameter of the valve. To reduce the number of ball valve operating torque and increase the reliability of the sealing, lubricating oil, to form a layer of oil film, which increases the sealing, and reduce operating torque, suitable for high pressure large diameter ball valve. Elastic ball: the ball valve is elastic sphere. Stainless steel ball valve internal structure of the ball and seat sealing ring is made of metal material sealing pressure is very big, relying on the pressure of the medium itself already could not reach the requirements of sealing, must exert external forces. This valve is suitable for high temperature and high pressure medium. Elastic ball is on the lower end of the sphere wall open one elastic slot, and elasticity. When close the channel, sphere rolling out with stem wedge-shaped head pressure to seal with the valve seat. Wedge head before you turn the sphere are released, the sphere then restore the original prototype, appear very small gap between the sphere and valve seat, can reduce the sealing surface friction and operating torque. That is about the electric ball valve selection requirement description, electric ball valves type specification details and internal structural analysis. Electric ball valve is made up by cock type ball valves and electric actuators, ball valve body structure to rotate for 90 degrees of valve core, line of electric actuators for 0 - Unit 10 ma standard signal, electric driven gear, worm gear and worm rotation torque to switch box of regulating valve. Its use is mainly by electrical discharge and adjusting operation.
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