美国凯斯通手柄式对夹蝶阀专业保障

对夹中线蝶阀主要由阀体、转轴、阀板、阀座及驱动机构（手柄、蜗轮蜗杆、气动装置或电动装置）等组成，靠驱动机构带动转轴及阀板旋转以实现启闭和控制流量的目的。对夹式蝶阀特点如下：
结构简单、小巧轻便，运输、安装、拆卸容易;90°启闭，开关迅速。操作扭矩小，省力轻巧;密封性能好，使用寿命长，可达到零泄漏;选择不同的零部件材质，可适用于多种介质;流量特性近似于直线，调节性能好。

美国凯斯通手柄式对夹蝶阀专业保障

Clip on butterfly valve mainly comprises a valve body, a rotating shaft, the valve plate and seat and a driving mechanism (handle, worm gear, pneumatic and electric device etc.), by the driving mechanism drives the rotating shaft and the valve plate opening and closing and rotation to achieve the purpose of flow control. The clip type butterfly valve features as follows:

The utility model has the advantages of simple structure, small size, portability, easy transportation, installation and disassembly, quick switching at 90 DEG and quick switching. The utility model has the advantages of small operation torque, labor saving, light weight, good sealing performance, long service life, zero leakage, different material selection of parts and components, and can be applied to a plurality of mediums; the flow characteristic is similar to the straight line, and the regulating performance is good.

橡胶密封蝶阀缺点是作节流使用时，由于使用不当会产生气蚀，使橡胶座剥落、损伤等情况发生。为此，现在上又开发金属密封蝶阀，气蚀区减小，近几年我国也开发了金属密封蝶阀，在日本近年来还开发耐气蚀、低振动、低噪声的梳齿形蝶阀。

　一般密封座的寿命在正常情况下，橡胶15年-20年，金属的80年-90年。但如何正确选用则要根据工况要求。

　蝶阀的开度与流量之间的关系，基本上呈线性比例变化。如果用于控制流量，其流量特性与配管的流阻也有密切关系，如两条管道安装阀门口径、形式等全相同，而管道损失系数不同，阀门的流量差别也会很大。