Comparing High Performance Double Eccentric Butterfly Valves with Soft Sealing Butterfly Valves

Feb 20, 2024 | News

Referring to butterfly valves, There are two popular options for high-performance applications. Seperately, they are double eccentric butterfly valves and the soft sealing butterfly valves.

When comparing high-performance double eccentric butterfly valve with soft sealing butterfly valves, it is essential to consider the specific requirements of your application.

I.High performance butterfly valves: Precision and Reliability

Design and Operation:

Double eccentric butterfly valves have a unique design with the stem offset from the centerline of the valve disc.

This design reduces friction and wear, allowing for smoother operation and precise control of fluid flow.

Sealing Method:

Double eccentric butterfly valves typically employ a metal-to-metal sealing mechanism.

This ensures a tight and reliable seal, even under demanding conditions with high temperatures, pressures, or abrasive media.

Performance Capabilities:

Double eccentric butterfly valves excel in high-performance applications, offering excellent throttling capabilities and low-pressure drops.

They provide reliable and precise flow control, making them suitable for industries such as oil and gas, chemical processing, and power generation.

II. Soft Sealing Butterfly Valves: Versatility and Resilience

Design and Operation:

Soft sealing butterfly valve feature a resilient seat made of materials such as EPDM, NBR, or PTFE. This design allows for a tight seal against the valve disc, so that it realized leak-free operation.

Sealing Method:

Soft sealing butterfly valves utilize a soft elastomeric material to create a seal between the disc and the seat. This sealing method provides excellent resistance to various fluids. For instances, water, air, and mild chemicals.

Performance Capabilities:

Soft sealing butterfly valves are versatile and suitable for a wide range of applications. These applications refer to water treatment, HVAC systems, and general industrial processes. Addtionally, they offer reliable sealing performance and can handle moderate temperatures and pressures.

III. Comparing Double Eccentric and Soft Sealing Butterfly Valves

Sealing Performance:

Double eccentric butterfly valves provide a metal-to-metal seal. So it presents the superior sealing performance under high-pressure and high-temperature conditions.

Soft sealing butterfly valves offer reliable sealing performance for moderate pressure and temperature applications, with the advantage of flexibility in handling different fluids.

Flow Control and Pressure Drop:

Double eccentric butterfly valves offer precise flow control and low-pressure drops. High-performance applications requiring precise throttling so double eccentric type is good choice.

Soft-sealing butterfly valves provide good flow control and moderate pressure drop. It is ideally suited for general industrial processes that are not demanding.

Application Suitability:

Double offset butterfly valves are commonly used in industries where accuracy and reliability are critical. Examples include oil and gas, chemical processing and power generation.

Soft sealing butterfly valves are widely used. We have demonstrated applications in water treatment, HVAC systems and general industrial processes.