Butterfly Valves

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1. Where would we normally use a butterfly valve?

Butterfly valves are suitable for gas generator, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting, power generation, environmental protection and other engineering systems, which is specially designed for regulating and cutting off fluid medium flow in pipeline systems containing a variety of corrosive and non-corrosive substances.

2. How do you choose the right butterfly valve?

Choosing the right butterfly valve should consider the following factors:

●The medium that the butterfly valve will control and the temperature of the medium. Different materials may react differently with a specific medium.

● The pressure rating. It is one of the key parameters in the valve selection, which is directly related to the safety and reliability of the valve. In the selection and use of butterfly valves, it is essential to determine the appropriate pressure rating based on concrete working condition.

● Type of connection. According to different materials and sizes of the butterfly valves, you can choose the wafer, flange, lug, threaded, and other connection modes.

● Valve drive mode. Butterfly valve can be equipped with manual, electric, pneumatic or hydraulic actuator, etc.

● Material requirements of main parts. That is, consider the material of valve seat, disc, body and so on.

3. What’s the difference between high-performance and general-service butterfly valves?

There are striking differences between high-performance butterfly valves and general-service butterfly valves in several ways. The following are the main differences between them:

Structure design: Taloar’s high-performance butterfly valves usually adopt a triple eccentric structure, which significantly improves the sealing performance between the disc and the seat and reduces the possibility of leakage. On the other hand, Taloar’s general-service butterfly valves mostly adopt the center line design, which has relatively weak sealing performance compared to high-performance butterfly valves, and is more susceptible to the influence of medium pressure and temperature.

Material selection: Taloar’s high-performance butterfly valve is more advanced in material selection. The valve body often uses carbon steel, forged steel, stainless steel and other corrosion-resistant, high-temperature-resistant materials and the valve seat adopts a multi-layer composite sealing materials to ensure that the two-way sealing of zero-leakage, easier medium washout and wear resistance. Taloar’s general-service butterfly valves, however, use base materials like cast iron, cast steel and ductile iron, whose corrosion and high-temperature resistance performance is relatively weak.

Performance characteristics: Taloar’s high-performance butterfly valves have better sealing, anti-corrosion, high-temperature resistance and wear resistance, as well as longer service life and better stability. They also have precise flow regulation and are suitable for complex application scenarios. In contrast, the performance characteristics of general-service butterfly valves are more common, so they are mainly used in general fluid control systems.

In summary, high-performance butterfly valves are superior to general-service butterfly valves in terms of structural design, material selection and performance characteristics, and are therefore more suitable for occasions with higher requirements for valve performance.

4. How could you choose right high performance butterfly valves?

The following key factors should be taken into account in selecting the right high-performance butterfly valves:

● Working conditions: specify the type of medium, temperature range and pressure rating to ensure that the butterfly valve material and sealing performance could meet the requirements.

● Valve size and flow: according to the size of the pipeline and the required flow range, select the appropriate size of the butterfly valve to ensure smooth flow.

● Material selection: according to the nature of the medium to choose the butterfly valve materials, such as stainless steel, alloy steel, etc. As for corrosive medium, it is necessary to choose corrosion-resistant materials.

● Operation and control: according to the needs, you can choose manual, electric or pneumatic control modes. What’s more, please consider the performance of the actuator and easy maintenance.

● Compliance with standards and norms: ensure that the selected butterfly valve complies with relevant international and domestic standards, such as ASME, to reduce the use risk.

To summarize, choosing the right high-performance butterfly valve requires comprehensive considerations such as working conditions, size, material, sealing performance, operation and control, and compliance with standards and norms and other aspects.

5. What’s special about our high-performance triple eccentric butterfly valves?

Taloar’s high-performance triple eccentric butterfly valve body is made of high-quality carbon steel, forged steel or stainless steel.

The multi-layer combination of seat sealing material ensures zero-leakage in both directions, easier medium washout and wear resistance and can be replaced by on-site maintenance. Valve seat materials, according to different working conditions, can choose complete metallic stainless steel material or the demanding Stellite cemented carbide material.

The full bore design of stainless steel valve discs ensures strong media flow capacity, to provide maximum flow.

Anti-blowout valve spindle design: the valve spindle uses high-strength, corrosion-resistant 17-4PH stainless steel material. Stainless steel sleeve is treated by special harden process, which makes it bear the heat, resist corrosion and firmly match with the valve shaft.

The double sealing design with field-adjustable graphite packing and carbon fiber gasket ensures that the switch’s airtightness and prolongs the service life.

Design standards are in accordance with ASME B16.34, API 609, EN488. Dimensions are in accordance with ASME B16.5, B16.1, ISO 5752, EN1092. Pressure tests are in accordance with API 598, ISO 5208, EN12266-1. Top flanges are in accordance with ISO5211.

Taloar has a wide range of high performance butterfly valves for you to choose from.