• Aug , 17 2023

1. Structural differences When selecting models with limited installation space, attention should be paid to: The gate valve can rely on the medium pressure to tightly close the sealing surface, thus achieving the effect of no leakage. When opening and closing, the sealing surface of the valve core and valve seat always contacts and rubs against each other, making the sealing surface easy to wear....

• Aug , 22 2023

Shut-off valve Also known as a shut-off valve, it belongs to the forced sealing type valve and is a type of shut-off valve. There are three types of connection methods: flange connection, screw connection, and welding connection. The "three modernizations" of valves in our country once stipulated that the flow direction of shut-off valves should be from top to bottom, so there is directional insta...

• Aug , 24 2023

Adjustment of safety valve opening pressure (set pressure): Within the specified working pressure range, the opening pressure can be adjusted by rotating the adjusting screw and changing the pre compression amount of the spring. After removing the valve cover and loosening the locking nut, the adjustment screw can be adjusted. Firstly, increase the inlet pressure to make the valve jump once. If th...

• Aug , 24 2023

Valves are the most common equipment in chemical enterprises. Installing valves may seem easy, but if not implemented according to relevant technologies, it can lead to safety accidents. Today, I will share some experience and knowledge about valve installation with you. Taboo 1 Consequence: Due to the rapid freezing inside the pipe during the hydraulic test, the pipe freezes out. Measures: Try to...

• Aug , 29 2023

The classification of valves can be divided by function, material, structure, pressure, diameter, connection method, and transmission method. The classification based on valve material is a common method of classification. According to the material of the valve body, valves can be divided into metal valves, non-metallic valves, and metal valve body lined valves. And metal valves are the most commo...

• Aug , 31 2023

The regulating valve positioner is the main accessory of the pneumatic actuator, which is used in conjunction with the pneumatic actuator to improve the position accuracy of the valve, overcome the influence of stem friction and medium imbalance, and ensure that the valve is correctly positioned according to the signal from the regulator. Positioners are required in the following situations: 1. Wh...

• Aug , 31 2023

Among users who use large-diameter globe valves in their daily lives, there is often a problem that they are difficult to close when used on media with large pressure differences, such as steam, high-pressure water, etc. When working under pressure, no matter how hard they are closed, leakage is always found and it is difficult to close. The reason for this problem is due to the structural design ...

• Sep , 05 2023

Due to the fact that electric butterfly valves are composed of butterfly valves and electric devices, the correct selection of electric devices after determining the butterfly valve is an important factor related to whether it can meet engineering needs in practical use. When selecting an electric device, not only should the aforementioned working environment, electrical control, and general techn...

• Sep , 07 2023

The installation and maintenance of butterfly valves should pay attention to the following matters: During installation, the valve disc should be stopped in the closed position. 2. The opening position should be determined according to the rotation angle of the butterfly plate. 3. For butterfly valves with bypass valves, the bypass valve should be opened before opening. 4. Installation should be c...