Valves can control flow of all types, from the thinnest gas to highly corrosive chemicals, superheated steam, abrasive slurries, toxic gases and radio active materials.

• 他们可以处理的温度从低温地区的熔融金属，和压力，从高真空成千上万的磅每平方英寸。阀门是一个最基本的和不可或缺的组成部分，我们的现代科技社会。