eccentric butterfly valve is specially designed for high functional working condition of the throttle valve, Marine valve adopts a deviating from the valve body center plate. At the same time as most of the butterfly Industrial Valves is characterized by eccentric valve business. To a large extent, butterfly valve using normal valve material, such as carbon steel, stainless steel or alloy steel. Marine valve when equipped with actuator and positioner, it has automatic concentric butterfly precision than.

compared with other throttle valve, there are many reasons eccentric butterfly valve is of the fastest growing of control valve type - today 。 Because involves by linear mechanical motion into rotary motion brought by the nonlinear problem, cut-off valve under the working condition of high pressure drop is Marine valves are more accurate. But today, through the butterfly valve control, in many of the working condition of low pressure drop, and other standard operation can meet the requirements.

compared with cut-off valve, Marine valve size smaller and lighter quality, because butterfly valve body assembly quality is any comparable weight of 40% 80%, and the weight is less than half of the globe valve assembly. In addition, the butterfly valve smaller actuators can be used normally, because adjustment of mass on the analysis of the actuator force f is not a decisive for home. When size gets bigger, the spiral valve and globe valve between the difference between the quality of the regulating elements is more apparent, such as table 4. 1. This meant the screw valve under the condition of limited space and consider the quality of the valve is preferred.

using the other key advantages of butterfly valve is size at the same time, it has a larger flow coefficient, rather than the cut-off valve can through the larger flow. As butterfly valve shaft is made of rotary motion instead of linear motion, the friction force is much lower than linear motion valve, so you can use a smaller thrust and smaller actuators. Butterfly valve with high pressure recovery coefficient (essentially 7. 2. Section 9) For Han is occurred in the contraction section, the coefficient and pressure recovery between the valve outlet. Wafer butterfly fujian back pressure drop capacity by the geometry of a type valve body, valve maximum flow capacity and impact on the hole or blocking operation ability, etc. All in all, Marine butterfly valve with high pressure recovery ability, work under the working condition of low pressure drop.

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