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Common selection principles and advantages and disadvantages of various valves for reference!

When the pipe diameter is less than 50mm, a stop valve should be used; Gate or butterfly valves should be used when the pipe diameter is greater than 50mm.

Jan 10,2022

Characteristics and advantages of water inlet ball valves in hydropower stations

This series of valves has a reasonable design structure, high strength, and no vibration at high flow rates. It can be opened according to the program, and the flow path is completely unblocked when it is opened. During operation, the water loss is small. When it is powered off (or powered on), it automatically closes in two stages according to the preset time and angle. It is suitable for water, seawater, oil, coal powder injection, coke oven gas, dust containing gas, and other media. It can be used for check and stop functions at the pump outlet or pipeline. It has the following characteristics: 1. It can replace the water pump outlet stop valve and check valve, and integrates mechanical, electrical, and hydraulic functions, with a small floor area; During the opening or closing process of the valve, the valve seat and ball crown do not rub against each other, resulting in a long service life of the valve; 3. The opening and closing of the valve is not affected by silt and debris, and is suitable for slurry water conditions; 4. Adopt two layers of metal and non-metal seals, with good self sealing performance. The greater the water pressure, the greater the sealing specific pressure; 5. High degree of automation, capable of local, remote, and linkage control; 6. The electrical system can adopt either a PLC intelligent control system or a common relay type system; 7. The hydraulic system has low motor power, high working efficiency, good pressure retaining performance, and long oil pump startup interval; 8. With obvious opening indication and mechanical limit adjustment mechanism, the travel switch device is waterproof and dustproof, not exposed, with stable performance and long service life; 9. The electrical operation interface is humanized and diversified, and can be designed with ordinary button type, text type, and touch screen type. New human-machine operation interfaces can also be designed according to customer needs.

Nov 12,2021

What are the advantages of pneumatic traps?

The development prospect of the pneumatic trap industry is very good, because it brings many benefits to the enterprise when it is used, so it is deeply favored by customers. In order to let everyone know more about it, let's talk about the advantages of pneumatic traps, hoping to bring help to more people.

Nov 12,2021

Things you must know when selecting a valve

The following principles must be clearly understood when selecting valves: ① Determine the working condition of the valve based on its use in the device or process pipeline. For example, working medium, working pressure, working temperature, ② Determine the sealing performance level of the valve according to the working medium, working environment, and user requirements, ③ Determine the type and driving method of the valve based on its purpose. Types such as block valves, regulating valves, safety valves, other special valves, etc., and driving methods such as worm gear, electric, pneumatic, etc, ④ Select according to the nominal parameters of the valve. The determination of the nominal pressure and nominal size of the valve should match the installed process pipeline. The valve is installed in the process pipeline, so its operating conditions should be consistent with the design and selection of the process pipeline. After the standard system used for the pipeline and the nominal pressure of the pipeline are determined, the nominal pressure, nominal size, and valve design and manufacturing standards of the valve used can be determined. Some valves determine the nominal size of the valve based on the flow or displacement of the medium flowing through the valve within the rated time. ⑤ Determine the connection form between the valve end face and the pipeline based on the actual operating conditions and the nominal size of the valve. Such as flange, welding, wafer, or thread, ⑥ The structural form of the valve type is determined according to the installation position, installation space, and nominal size of the valve. Such as non rising stem gate valve, angle stop valve, fixed ball valve, etc. ⑦ According to the characteristics of the medium, working pressure, and working temperature, select the materials of the valve housing and internals correctly and reasonably.

Nov 12,2021

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