the positive role of structure, the air into the casing in above the diaphragm. Lies at the bottom of the actuator actuator spring plate and scope. Scope of spring contact to the bottom of the yoke to make spring top to diaphragm plate and the subsequent diaphragm. In stress ( Or failure) Position the diaphragm is pushing the upper casing area. When the air into the upper casing and generate pressure, diaphragm and diaphragm plate into the spring. When the signal pressure increases, the air pressure more than the strength, the diaphragm downward movement and board. The campaign to make actuator rod ting and led to the closing of the Industrial Valves to a t. When the signal of air pressure is reached, eventually lead to air pressure in air chamber, the diaphragm and the board to complete the whole trip. On the other side of the plate and scope Kui was almost completely compressed. In this regard, the valve stem position in all of its extension, the full weight of the valve in the signal range is closed. When the signal attenuation, and the air pressure is reduced, the resistance of the scope of the spring to produce effect, actuator movement to its relaxed and the valve is opened.

a reverse effect on the structure, the lower the air chamber is used to provide air pressure to shrinkage of the actuator rod, a reverse effect at the same time the spring produce resistance and failure modes. The upper casing is static, only used to fix the diaphragm and the air is released into the atmosphere. For this kind of structure, the lower casing under pressure, and equipped with a connection to the air chamber air on the air. Diaphragm plate installed above the diaphragm. Under the scope of the spring is located in the lower casing and do not contact directly with the diaphragm and the plate assembly. Scope of spring in the actuator rod on the container. Because fei won spring contact to the bottom of the lower casing ( Or in this case, the top) When actuator rod with air contraction to lower air chamber, the spring resistance increased accordingly. When actuator contraction, began to open the valve. When air signal in the range of high-end, the actuator rod all contract, scope of the spring was almost completely compressed. When the signal change well move to the lower end of the fan coil, to the F of the air chamber air pressure reduction. At this point, the scope of elastic Ze resistance began to push actuator rod to relax ( Extension) State, until you reach all extend and valve closed.

Shenzhen Mech Valve Trading Co., Ltd. have now make a decision to enlarge our company in other countries.
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