• 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 ...

• 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 , 29 2023

1、 Industrial pipeline metal flange bridging ·Article 7.13.1 of GB 50235-2010 "Code for Construction of Industrial Metal Pipeline Engineering" stipulates that for pipelines with electrostatic grounding requirements, when the resistance value between each pair of flanges or other joints exceeds 0.03 ohms, a wire jumper should be installed. Article 6.12.2 stipulates that when the ground resistance v...

• 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 , 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 , 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 , 22 2023

There are various types of fillers for valves, and different fillers are suitable for different operating environments. The correct selection of fillers can increase the service life of the valve. Introduction to the types and functions of commonly used valve fillers: 1、 Compressed packing (1) Plant fiber filler Made of hemp or cotton impregnated oil, wax, or other anti-seepage materials, used on ...

• 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 , 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 , 17 2023

Many companies now have a lot of disposable working capital on their hands. For domestic fluid companies, there are not many channels to invest in their own companies, so the idle liquid cash is generally purchased to enhance their own enterprise strength. On the one hand, converting working capital into fixed funds or fixed costs can ensure the safety of funds and not be lost; On the other hand, ...