Double Flanged Double Offset Butterfly Valves Ductile Iron Pn16 Pn25

Double Flanged Double Offset Butterfly Valves Ductile Iron Pn16 Pn25

1. When opening or closing, there is no friction between the disc and the sealing surfaceof the Wafer Triple Offset Butterfly Valve;
2. The valve can be installed in any location;
3. Zero leakage design;

Product Details

We adhere to the market-oriented, technology-centric, service-oriented policy, and the concept of achieving customers and creating value models to meet customer needs with various Lever Butterfly Valve, Triple Eccentric Butterfly Valve, Concentric Butterfly Valve. Our company closely keeps up with customer needs and cutting-edge technology, continuing to innovate and subvert tradition, and striving to provide customers with cost-effective and highly reliable products. As a way to use the resource on the expanding info in international trade, we welcome prospects from everywhere on the web and offline. We implement innovations in concept, technology, management, mechanism, and marketing, continue to extend brand advantages, and focus on brand promotion and management. We dare to challenge the status quo, and have the courage to adopt a new and forward-looking attitude to create ideas that are one step ahead.

【Product Introduction】:

Wafer Triple Offset Butterfly Valve shown in the figure is a worm gear made of carbon steel material. The seat sealing material can be a full metal ring, and can be made of a graphite type laminated metal, which is elastic. The PTFE seat seal is a flexible seat butterfly valve. This seat can be design and produced as zero leakage type and suitable for corrosive medium.It is easy to produce and costs less than all metal seat butterfly valves.


【Application Of PTFE Seal-ring】:

PTFE people aslo call it Teflon.It has high temperature resistance, corrosion resistance, excellent electrical insulation, aging resistance and other characteristics.Resistant to the corrosion of almost all chemicals, but by molten alkali metal erosion. ZFVALVES Butterfly valve often uses PTFE as the valve seal-ring.PTFE has become the main corrosion resistant material in petroleum, chemical and textile industries due to its excellent corrosion resistance.As Seal ring the working temperature is -29℃~150℃.

*  PTFE Mechanical property:

   σb (MPa):20.7~27.5

   δ5 (%):250~350

   αk (J/cm2):>98.1

   HARD(HB):50~65D

* Thermal properties:

   Distortion temperature:1.86MPa:55℃; 0.46MPa:120℃

   Martin temperature:250℃


美标对夹蝶阀IMG_5704(1)


How to choose the right Butterfly valve】:

1) According to the nature of the working medium: working pressure, working temperature, corrosion performance, whether it contains solid particles, whether the medium is toxic etc to choosing the right material.

2) Installation size and dimensions: nominal diameter, connection to pipe and connection dimensions, dimensions or weight restrictions.

3) Select the appropriate operation mode according to the actual situation.

4) The maximum and minimum flow requirements; pressure drop for normal flow; pressure drop at shutdown; maximum and minimum inlet pressure for the valve.

5) Select the correct connection according to the reserved location of the pipeline.

The final control of the pipe is the valve. If you have any questions regarding valve selection, please contact us.ZFV will give you the most professional advice and the most suitable choice.


Our Double Flanged Double Offset Butterfly Valves Ductile Iron Pn16 Pn25 has the characteristics of compact size and easy operation, which will open up new markets. Our company has been adhering to the people-oriented, customer first, win-win business philosophy and adhere to the leading technology, scale development, professional quality and brand service. We insist on people-oriented, and hope to provide employees with a good working environment and incentive mechanism.
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