Last weekend, COVNA team went to the group travel in Qingyuan, Guangdong Province, as the award for the winners in the last season competition. This is the first time that we travel since the beginning of the Corona Virus. We had so much fun!And we also had some interesting group activities and realized the significance …
Butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type and lever type according to the structure. According to the sealing form, it is divided into two types: relatively sealed type and hard sealed type. Soft seal butterfly valves generally use rubber ring seals, and hard seal butterfly valves generally use metal …
In the daily use of valves, various failures are often encountered. Valve leakage is the most common of many failures, and valve leakage generally includes internal leakage and external leakage! So, what is the difference between the two? The internal leakage of the valve generally refers to the situation that the medium is still flowing …
Pneumatic film three-way control valve can be divided into two modes of action: converging and splitting. The spool structure adopts a cylindrical thin-walled window and is guided by the side of the spool. In some cases, it can replace two two-way valves and a three-way connection. But it is widely used, and it is often …
The biggest difference between an electric shut-off valve and a pneumatic shut-off valve, as the name suggests, is that the drive form is different, one is controlled by the power source, and the other is controlled by the air source. From the perspective of running time, the action of pneumatic valves is relatively faster, while …
Swing check valve, also known as check (flow) valve, is an automatic valve used in one-way flow pipelines to prevent the medium from flowing back. It depends on the pressure of the medium flow in the pipeline to open or close the valve by itself. It can be divided into single valve type , Double …
The relationship between the opening of the butterfly valve and the flow rate basically changes linearly. If it is used to control flow, its flow characteristics are also closely related to the flow resistance of the piping. For example, two pipelines are installed with the same valve diameter and form, but the pipeline loss coefficient …
As the name implies, sanitary valves refer to valves that meet sanitary standards (medical standards or food standards). The valve body must meet the sanitary standards of stainless steel. All parts in contact with the medium are mirror polished. The polishing and cleanliness must meet the sanitary standards. The hygienic standards of valve components are …
Pneumatic ball valve working principle Pneumatic Ball Valve is composed of pneumatic actuator and ball valve, replacing manual operation, not only saves a lot of manpower and material resources, but also can control multi-ball valve. Pneumatic Ball Valve actuator to work with the valve body can quickly open and close, the speed can be cut …
Fire-proof and anti-static ball valve is a kind of pipelines that can be used for natural gas, artificial coal gas, liquefied gas, city gas and non-corrosive gas. It has anti-static and fire protection devices, that is, it is installed between the ball and the valve stem, the valve stem and the valve body. The conductive …