According to the selection of control functions, various valves have their own functions, so pay attention to their corresponding functions when selecting.
Corrosion has always been one of the most serious hazards of chemical equipment. A slight carelessness can damage the equipment, or cause an accident or even a disaster. In the selection of chemical valves, the first thing to pay attention to is the scientific nature of material selection. There is usually a misunderstanding that stainless steel is a "universal material". It is very dangerous to hold stainless steel valves regardless of the medium and environmental conditions.
The globe valve is one of the more widely used valves. The reason why it is popular is that the friction between the sealing surfaces during the opening and closing process is small, it is relatively durable, the opening height is not large, the manufacturing is easy, and the maintenance is convenient. Low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the disc and the sealing surface of the valve seat closely fit to prevent the medium from flowing.
The sealing principle of the wedge gate valve is based on the tight combination of the two sealing surfaces on the wedge gate and the two sealing surfaces on the valve body to achieve the seal. The purpose of using the wedge gate is to increase the auxiliary sealing load, so that the metal hard-seal wedge gate valve can seal both high medium pressure and low medium pressure. When closing, rotate the valve stem clockwise to make the sealing surface of the gate valve and the sealing surface of the valve body close to achieve a seal.
Author: Fucheng County PENGDA machinery Source: valve manufacturers Published: 2020-11-18 09:21 Views: 98
© 2021 Zhejiang Zhengfeng Valve Co., Ltd.
