1: The sealing surface leaks 1. There are sundries in the butterfly plate and sealing surface 2. The closing position of the butterfly plate and the sealing surface is not properly matched 3. The flange bolts on the outlet side are not uniformly stressed or not according to the requirements of Figure 1 4. The pressure test direction is not as required in Figure 1…

Electric butterfly valve is a kind of regulating valve device used in automatic control system. The control principle of the valve is that it can lead and control the closing of the valve according to the signal of the power supply. Electric butterfly valve has many functions. It is a multi-functional valve that integrates check valve, control valve and shut-off valve.…

Metal valves can be said to be the key component structures that are most prone to corrosion and failure in engineering equipment. Usually, the sealing surface, valve stem, diaphragm, small spring and other valve parts of metal valves are generally made of first-class materials, and the valve body and valve cover are suitable for For secondary or tertiary materials, for valves used in high pressur…

The turnnion mounted ball valve has a floating valve seat. After being pressurized by the medium, the valve seat moves, so that the sealing ring is tightly pressed on the ball to ensure the sealing. Bearings are usually installed on the upper and lower shafts with the ball, and the operating torque is small, which is suitable for high-pressure and large-diameter valves.…

Pneumatic ball valves are mainly used for cutting off in pipelines. It is fast and can distribute and change the flow direction of the medium well. Pneumatic ball valve is a new type of valve that has been widely used in recent years, mainly including pneumatic hard-sealed ball valve, pneumatic soft-sealed ball valve, pneumatic flanged ball valve, pneumatic forged steel ball valve, pneumatic high-…

Pneumatic ball valve is a kind of pneumatic valve, including hard-sealed pneumatic ball valve, pneumatic O-shaped cut-off ball valve, soft-sealed pneumatic ball valve, wafer type pneumatic ball valve, pneumatic floating ball valve, pneumatic three-way ball valve, pneumatic flanged ball valve, etc. According to the different balls, it can be divided into floating ball pneumatic ball valve, fixed ba…

The medium of the bellows globe valve is very important, so everyone knows how to choose the medium of the bellows globe valve? Let's have a look! This is also a concern of many consumers. When the medium is toxic, volatile, radioactive, or it is extremely expensive and not allowed to be leaked by the reciprocating valve stem, a bellows is often used to seal the valve cover.…

V-shaped ball valve is a kind of ball valve. The closing part is a hemisphere with a V-shaped opening and a sharp edge. During the rotation of the sphere, there is a wiping effect between the closing parts, which has a strong cutting force on the medium. In addition, it also belongs to the V-shaped ball valve, which is a fixed ball valve and a single-seat sealed ball valve.…