Overview and classification of American standard globe valves

If the shut-off valve is a device with superb cut-off performance, then the American standard gate valve is a kind of pipe part that has a special cut-off effect. This kind of cut-off valve device generally has the characteristics of pressure resistance and wear resistance. This is because the components of this valve are made of stainless steel or carbon steel, so certain techniques are used in the hardness and surface treatment to prevent the components from wearing out too quickly. It is a type of valve device that can not be ignored in the American standard valve.
Gate valves are more and more widely used in various industrial systems due to their advantages such as pressure resistance, temperature resistance (high and low temperature), corrosion resistance (multiple material configurations), two-way sealing function, wear resistance and long service life. The opening and closing of the medium plays an important role for the stability and control of the system. It is classified in the form of the gate plate of the common domestic standard rising stem gate valve (the new structure is not listed), and it mainly includes Z40, Z41, Z42 and Z44 structures (Figure 1). The user should select the appropriate model based on the working conditions. And standardize operations in installation, commissioning and maintenance to avoid or eliminate accidents.