Development of butterfly valves In the 1930s, the United States invented the butterfly valve, and it was introduced to Japan in the 1950s. It was only widely used in Japan in the 1960s, and it was promoted in China after the 1970s. At present, butterfly valves above DN300 mm have gradually replaced gate valves …
For a long time, the general gate valves used in the market generally have water leakage or rust. Our company uses European high-tech rubber and valve manufacturing technology to produce elastic seat seal gate valves, which overcomes the defects of general gate valves such as poor sealing and rust. The sealing gate valve uses the compensation function of the elastic gate plate to produce a small amount of elastic deformation to achieve a good sealing effect. The valve has the obvious advantages of light switch, reliable sealing, good elastic memory and service life. It can be widely used as a regulating and intercepting device on the pipelines of tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electric power, shipbuilding, metallurgy, energy system, etc.
The penstock is used to close and open the control facility of the water discharge (discharge) channel. An important part of hydraulic structures can ，be used to intercept water flow, control water level, adjust the flow, discharge sediment, and float, etc. Penstocks are widely used in waterworks, sewage plants, petroleum, chemical, metallurgy, environmental protection, electric power, irrigation and drainage, drainage, ponds and weirs, rivers, and other projects to cut off, adjust flow, and control water level. So how to install and maintain penstocks and hoisting equipment? Let me give you a brief introduction:
What are the classification and structure of the penstock? The penstock is a control facility used to close and open the water discharge (discharge) channel. Gates are an important part of hydraulic structures, which can be used to intercept water flow, control water level, regulate flow, discharge sediment, and float, etc. The following will introduce the classification and structure of the gate in detail;
A gate valve refers to a valve in which the closing member (gate) moves along the vertical direction of the centerline of the passage.
The gate valve is mainly used for cutting off in the pipeline.
Gate valve is a widely used valve. Generally, cut-off devices with a diameter of DN≥50mm are selected for use, and sometimes gate valves are also used for cut-off devices with a small diameter.
A pneumatic valve is an executive unit in a fluid control system in the industrial automation field. It is a combination of a pneumatic actuator and a valve, and when the actuator is driven by the air source pressure to control the operation of the valve. This chapter mainly describes It is a commonly used rotary switch type pneumatic valve.
There are mainly the following types of valves commonly used in sugar factories. 1. Globe valve (ball valve, ball valve) Because the shut-off valve can accurately adjust the flow rate and cut off the channel tightly, it is the main opening and closing device on the sugar liquid and steam pipelines, and can also be …
The valve is a control component in the pipeline fluid conveying system. It is used to change the passage section and the flow direction of the medium. It has the functions of diversion, cutoff, throttling, check, diversion, or overflow pressure relief. There are two reasons for the damage to the sealing surface: man-made damage and natural damage. Man-made damage is caused by factors such as poor manufacturing, improper selection of materials, improper installation, poor use, and ineffective maintenance. Natural damage is the wear of the valve under normal working conditions and the damage caused by the inevitable corrosion and erosion of the sealing surface of the medium.
The gate valve is used as a cut-off medium, and the whole flow is straight when it is fully opened. At this time, the pressure loss of the medium is small. Gate valves are usually suitable for working conditions that do not need to be opened and closed frequently and keep the gate fully open or fully closed. Not suitable for fine-tuning or throttling.