高温通风蝶阀启闭件是一个圆盘形的蝶板，在阀体内绕其自身的轴线旋转，从而达到启闭或调节的目的。高温通风蝶阀全开到全关通常是小于90° ，蝶阀和蝶杆本身没有自锁能力，为了蝶板的定位，要在阀杆上加装蜗轮减速器。采用蜗轮减速器，不仅可以使蝶板具有自锁能力，使蝶板停止在任意位置上，还能改善阀门的操作性能。工业专用高温蝶阀的特点能耐高温，适用压力范围也较高，阀门公称通径大，阀体采用碳钢制造，阀板的密封圈采用金属环代替橡胶环。大型高温蝶阀采用钢板焊接制造，主要用于高温介质的烟风道和煤气管道。

The high temperature ventilating butterfly valve opening and closing part is a disc shaped butterfly plate which rotates around its own axis in the valve body so as to achieve the purpose of opening or closing or regulating. The high temperature ventilation butterfly valve is usually less than 90 degrees, the butterfly valve and the butterfly rod itself have no self locking ability. In order to locate the butterfly plate, the worm gear reducer should be installed on the stem. The worm gear reducer can not only make the butterfly plate self locking ability, but also make the butterfly plate stop at any position, and it can also improve the operation performance of the valve. The special-purpose high temperature butterfly valve is characterized by high temperature, high pressure range, large diameter of valve, carbon steel in valve body and metal ring instead of rubber ring. Large and high temperature butterfly valves are manufactured by steel plate welding. They are mainly used for smoke channels and gas pipes in high temperature media.

高温通风蝶阀是指关闭件(阀瓣或蝶板)为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀，在管道上主要起切断和节流用。高温通风蝶阀启闭件是一个圆盘形的蝶板，在阀体内绕其自身的轴线旋转，从而达到启闭或调节的目的。高温通风蝶阀全开到全关通常是小于90° ，蝶阀和蝶杆本身没有自锁能力，为了蝶板的定位，要在阀杆上加装蜗轮减速器。那么它在安装的时候，想要注意哪些要点呢？
1.通风蝶阀高温蝶阀安装位置、高度、进出口方向必须符合设计要求，注意介质流动的方向应与阀体所标箭头方向一致，连接应牢固紧密。
2.通风蝶阀高温蝶阀安装前必须进行外观检查，阀门的铭牌应符合现行国家标准《通用阀门标志》GB 12220的规定。对于工作压力大于1.0 MPa 及在主干管上起到切断作用的阀门，安装前应进行强度和严密性能试验，合格后方准使用。通风蝶阀高温蝶阀强度试验时，试验压力为公称压力的1.5倍，持续时间不少于5min，阀门壳体、填料应无渗漏为合格。严密性试验时，试验压力为公称压力的1.1倍；试验持续的时间符合GB 50243要求。
High temperature ventilated butterfly valve is a kind of valve that is turned off and closed around the valve shaft by turning the closed part (valve or butterfly plate) into a disc, and it is mainly cut off and throttle on the pipe. The high temperature ventilating butterfly valve opening and closing part is a disc shaped butterfly plate which rotates around its own axis in the valve body so as to achieve the purpose of opening or closing or regulating. The high temperature ventilation butterfly valve is usually less than 90 degrees, the butterfly valve and the butterfly rod itself have no self locking ability. In order to locate the butterfly plate, the worm gear reducer should be installed on the stem. So what are the main points that it wants to pay attention to when it is installed
1. the installation position, height, import and export direction of the high temperature butterfly valve must conform to the design requirements. It is noted that the direction of the medium flow should be consistent with the direction of the body's arrow, and the connection should be firm and tight.
2. ventilation butterfly valve high temperature butterfly valve must be examined before installation. The nameplate of the valve should conform to the current national standard "general valve sign" GB 12220. The strength and tight performance test should be carried out before the installation of the valve whose working pressure is more than 1 MPa and the valve is cut off on the main pipe. When the strength test of high temperature butterfly valve of the butterfly valve is tested, the test pressure is 1.5 times of the nominal pressure, and the duration is not less than 5min. The valve shell and packing should be qualified without leakage. During the tightness test, the test pressure is 1.1 times the nominal pressure; the duration of the test is in line with the requirements of GB 50243.