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Abstract：  The iso-strength sealing ring structure of the triple eccentric hard-seal butterfly valve is introduced, and the process improvement to improve the performance of the sealing diagram and the long-term service life is discussed.
Keywords Triple eccentric butterfly valve. Equal-strength seal design. Process improvement of triple eccentric butterfly valve.

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What is the water hammer effect? Water hammer effect refers to the phenomenon that the flow rate changes suddenly and the pressure fluctuates greatly due to the sudden opening and closing of the valve and the sudden start and stop of the water pump during the transportation of water or other liquids. To put it …

How to eliminate the influence of water hammer on the pipeline Read More »

Article Summary: This article analyzes the technical characteristics of the new heavy hammer hydraulic control check butterfly valve, discusses the working principle of the hydraulic control system, and gives the configuration method of the electronic control device.

Keywords： Hydraulic control check butterfly valve: water hammer: fast closing; slow-closing

Composition:   The flow regulating valve is composed of a valve body, an executive actuator, and its accessories.   Working principle:   The pneumatic diaphragm actuator of the flow control valve has two forms of positive action and reverse action; as the signal pressure increases, the pushrod moves downward as a positive effect, otherwise, the …

10 basic knowledge of flow control valve selection Read More »

What should I do when the valve leaks during use? What is the main reason?

In the fluid piping system, the valve is the control element, and its main function is to isolate the equipment and the piping system, adjust the flow, prevent backflow, adjust and drain the pressure. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Since it is very important to choose the most suitable valve for the piping system, it is also important to understand the characteristics of the valve and the steps and basis for selecting the valve.

A penstock is commonly used to control the flow and water level and for isolation of fluid. It mainly consists of a sliding door which is controlled by mechanical spindle moving through a hole in a frame built onto a structure. Penstock is the term used in UK while sluice gate is more commonly adopted outside UK. In the design of penstock, it is important to identify if it would take on-seating head or off-seating head.
On-seating head refers to the water pressure forcing the penstock into the wall while off-seating head refers to the water pressure forcing the penstock out of the wall as shown below.

The conventional water production process of the water plant takes the raw water, flocculates and settles in the sedimentation tank, filters in the filter tank, and finally outputs water from the pump room, all of which are inseparable from the use of valves. However, the requirements for valve selection in different parts are quite different. The main difference lies in the diameter of the valve, the type of valve, and the control method of the valve.