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Several categories of valve products in China


The domestic market valve manufacturers about more than 2300, can provide the valve products have several categories, more than 3500 varieties, more than 40,000 specifications. Here is an introduction to the classification of valves!

Brief description of the classification and structure of ball valves


Ball valves are divided into: floating ball ball valves, fixed ball ball valves, orbital ball valves, V-shaped ball valves, three-way ball valves, stainless steel ball valves, cast steel ball valves, forged steel ball valves, ash discharge ball valves, sulphur resistant ball valves, pneumatic ball valves, electric ball valves, ferrule ball valves, welded ball valves.

Ball valve maintenance precautions


If a slight leak occurs at the packing, the stem nut must be locked again. But do not lock too tight, usually lock again 1/4 turn ~ 1 turn, the leakage will stop.Second, replace the valve seat and seals

Advantages of electric valves over traditional valves


In terms of operational efficiency and energy savings, the use of automatic control valves is an indispensable part of the process. The manual and pneumatic valves traditionally used in industry are not as cost effective as electric valves in terms of installation and efficiency.

Advantages and disadvantages of pneumatic and electric valves


Pneumatic valve action force distance than the electric valve, pneumatic valve switch action speed can be adjusted, simple structure, easy maintenance, action process because of the gas itself buffer characteristics, not easy to damage due to jamming, there is a gas source, and its control system is also more complex than the electric valve.

How to choose a high quality electric ball valve


Electric ball valve procurement only clear specifications, categories, work pressure to meet the procurement requirements of the practice, in the current market economy is not perfect. Because the electric ball valve manufacturers in order to product competition, each in the electric ball valve unified design of the concept, different innovations, the formation of their own corporate standards and product personality. Therefore, in the procurement of electric ball valves more detailed technical requirements, and manufacturers to coordinate to achieve consensus, as the annex to the procurement contract of electric ball valves is very necessary.

How to choose the right electric ball valve


According to the introduction, in the next 10 years, China will have more than 20,000 kilometres of oil pipelines to be built, including Russia, Kazakhstan and other transnational oil pipelines. In addition, following the "West-East gas transmission", China will have to build more than 20,000 kilometres of transnational gas pipelines and branch lines.

The working principle of pneumatic valves and fault analysis


The so-called pneumatic valves specifically refer to the use of cylinders as actuators and compressed air as the power source to achieve the actuation of the valves in order to achieve the adjustment of the switches. When the control signal is received by the control system, the temperature, pressure, flow and other relevant parameters are adjusted. In general, pneumatic valves are characterised by their reliability, rapid response and simple control. In the specific operation process, the regulating air chamber will be input 0.02-0.10MPa signal pressure, the film will appear thrust, in the process of thrust disc downward movement will be compressed spring, to achieve the valve stem, push rod and spool downward movement, to achieve the purpose of the valve regulation.

Advantages and disadvantages of several types of valves


Gate valve is the closing member (gate) along the vertical direction of the axis of the channel to move _ the valve, in the pipeline mainly as a cut-off medium with, that is, fully open or fully closed use. In general, the gate valve may not be used as a regulating flow. It can be applied to low temperature pressure can also be applied to high temperature and high pressure, and can be different materials according to the valve. However, the gate valve is generally not used in the pipeline for transporting slurry and other media.

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