is used on pipeline engineering is an important component of a switch or adjust flow effect, can choose different valves according to different requirements, material variety, suitable for water, gas, acid, alkaline medium, such as different media can choose different material of the valve. also has a good variety of operating mode, the electric valve automation era is one of the pipeline in more, can realize remote operation, electric control switch, also could be selected according to the condition of adjusting or explosion. When the condition to use electric valve, in the selection of electric actuator which we need to pay attention to details? The selection of electric actuator based on introduces for you below. electric actuator of correct selection should be based on: 1, the operating torque: operating torque is to choose the zui main parameters of valve electric device. electric actuator output torque should be operating zui 1 big moment. 2 to 1. 5 times. 2, operating thrust: there are two kinds of valve electric device of the host structure, one kind is not configured thrust plate, the direct output torque; Another is to configure the thrust plate, the output torque by thrust plate stem nut can be converted into output thrust. 3, output shaft rotation ring count: the number of laps valve electric actuator output shaft rotation with nominal diameter of the valve, the valve stem thread pitch, thread, calculated at M = H/ZS ( Type: M for electric devices should satisfy the total number of rotating ring; H for the valve opening, mm; S for the stem drive screw pitch, mm; Z to stem thread. ) 4, stem diameter, for rising stem valves multi-turn class, if electric device allows zui big stem diameter can't through the stem of the valve, cannot assemble into electric valve. As a result, the inner diameter of the hollow output shaft electric actuator must be greater than rising stem valves stem diameter. For part of the rotary valve and multi-turn valves of non-rising stem valves, although need not consider stem diameter through the problem, but also should fully consider when selecting the valve stem diameter and the size of the keyway, after assembly to work properly. 5 and the output rotational speed, the valve opening and closing speed, easy to produce water hammer. Therefore, we should according to the different conditions of use, select the appropriate opening and closing speed. 6, installation, connection mode: the installation of electric way have installed vertical, horizontal, fall to the ground;
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