PTD343H-25C Triple Eccentric Hard Seal Butterfly Valve

Triple eccentric butterfly valve, D343H butterfly valve, cast steel butterfly valve, hard seal butterfly valve, Zhejiang butterfly valve,

Zhejiang Putian triple eccentric butterfly valve is suitable for flow regulation. Since the pressure loss of the butterfly valve in the pipeline is relatively large, the sturdiness of the disc bearing the pipeline medium pressure when closing should also be considered. In addition, the limitation of the working temperature that the elastic seat material can withstand at high temperatures must be considered. The butterfly valve has a small structural length and overall height, fast opening and closing speed, and fluid control characteristics. The structural principle of the butterfly valve is suitable for making large-diameter valves. When the butterfly valve is required to control the flow, it is important to correctly select the size and type of the butterfly valve so that it can work properly and effectively.

Zhejiang Putian triple eccentric butterfly valve is usually used in throttling, regulation control and slurry medium, requiring short structural length and fast opening and closing speed (1/4 turn). Low-pressure cut-off (small pressure difference), the butterfly valve is recommended.

Zhejiang Putian triple eccentric butterfly valve can be selected for two-position regulation, constricted channel, low noise, cavitation and vaporization phenomenon, slight leakage to the atmosphere, and abrasive medium.

Zhejiang Putian triple eccentric butterfly valve is used in special working conditions such as throttling regulation, strict sealing requirements, severe wear, low temperature (deep cold), etc. It is necessary to use a specially designed metal seal with regulating device triple eccentric or double eccentric special butterfly valve.

Zhejiang Putian triple eccentric butterfly valve is suitable for fresh water, sewage, seawater, salt water, steam, natural gas, food, oil, and various acids and alkalis and other pipelines that require strict sealing, zero gas test leakage, high life requirements, and working temperature from -10 degrees to 150 degrees.

Zhejiang Putian soft seal eccentric butterfly valve is suitable for two-way opening and closing and regulation of ventilation and dust removal pipelines, and is widely used in gas pipelines and water pipelines of metallurgy, light industry, electric power, and petrochemical systems.

Zhejiang Putian triple eccentric metal-to-metal line seal double eccentric butterfly valve is suitable for urban heating, gas supply, water supply and other gas, oil, acid and alkali pipelines, as a regulating and throttling device.

Zhejiang Putian triple eccentric metal-to-metal surface seal triple eccentric butterfly valve is not only used as a program control valve for large-scale pressure swing adsorption (PSA) gas separation devices, but also widely used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields.

Working principle of Zhejiang Putian triple eccentric metal hard seal butterfly valve: The typical triple eccentric metal seal butterfly valve, in addition to the two eccentrics of the valve stem and the disc, the sealing surface of the disc and the seat is in the shape of an oblique circular platform (this is the so-called third eccentricity of the triple eccentricity). When the triple eccentric metal hard seal butterfly valve is closed, the disc is pushed forward due to the eccentricity. The disc and the seat do not generate friction during the closing process. The disc is directly pressed on the seat, which ensures the service life of the valve;

In addition, because the sealing ring of this valve (whether installed on the seat or the disc) has a certain elasticity, and there is a small gap between the boss in the elastic ring and the elastic ring that allows the elastic ring to move slightly; when the valve is closed, under the action of the closing force, the elastic sealing ring can automatically move to a position with uniform force; plus the slight deformation of the elastic ring, the sealing ring at the seat is evenly stressed to achieve a sealed state.

Performance changes of triple eccentric metal hard seal butterfly valves with different eccentric structures: In traditional concepts, butterfly valves can only be used in occasions with normal temperature, low pressure and low sealing requirements.

With the continuous development of modern process technology and material industry, the application range of Zhejiang Putian butterfly valve has far exceeded the past, and it can almost replace most traditional valves, widely used in various fields of industry. Especially the triple eccentric metal seal butterfly valve is more eye-catching.

Because the closing of the triple eccentric butterfly valve is the same as that of the gate valve, it is completed by torque. The greater the closing torque of the valve, the better the sealing of the seat. Therefore, some people call the triple eccentric butterfly valve a 90° rotating gate valve. In the major overhaul of factories, more and more triple eccentric butterfly valves replace gate valves. For this reason, some manufacturers of triple eccentric butterfly valves specially produce a triple eccentric butterfly valve with the same length as the gate valve, and call this triple eccentric metal seal butterfly valve a triple eccentric gate valve.

As the number of eccentrics of the Zhejiang Putian valve disc increases, the thickness of the valve disc also increases, so the resistance of the fluid flowing through the triple eccentric butterfly valve increases; as the number of eccentrics of the butterfly valve increases, the performance of the valve also changes greatly.