Zhejiang ZhengFeng Valve CO.,LTD with the main products appeared in the 24th Shenyang International Pump Valve exhibition.
The 10th SHANGHAI International Pump And Valve Exhibition in 2021
In the process of long-term development, use and management of valves, they will be affected by the friction of environmental media, and there will be many different levels of wear and tear, which can affect the actual service life of the enterprise, so what teaching methods do we have to extend the service life of the check valve What? Let's get to know the manufacturers of pneumatic check valves together. The high temperature check valve is a kind of automatic valve, the main function is to prevent the medium from flowing back, prevent the pump and the drive motor from reversing, and to discharge the container medium.
ZFVALVES participated in the 10th Shanghai International Pump and Valve Exhibition in 2021.
The manufacturer tells you how to deal with valve failure 1. Leakage of valve packing. Cause Analysis: 1. The packing gland is not tightly pressed. 2. The filler becomes invalid due to long-term use or improper storage.
According to the differences in the main application sites, effects and actual meanings of grooved gate valves, the application fields of pressure regulators in China are divided into three situations: market sales, mid-market sales and mid- and low-end market sales.
There are two types of electric valves. One is a quarter-turn electric valve: a quarter-turn electric actuator is used in conjunction with a quarter-turn valve to achieve internal rotation of the valve within 90 degrees to control the flow of fluid in the pipeline; the other is a straight-stroke electric valve: The straight-stroke electric actuator is used in conjunction with the straight-stroke valve to realize the up and down movement of the valve plate to control the flow of the pipeline. It is usually used in conjunction with equipment with a higher degree of automation.
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.
© 2021 Zhejiang Zhengfeng Valve Co., Ltd.
