The Contest Between Electric and Pneumatic Actuator Butterfly Valves: Choosing Soft Sealing or Solid Strength?

The Contest Between Electric and Pneumatic Actuator Butterfly Valves: Choosing Soft Sealing or Solid Strength?

At the core of industrial wonders, precision pairs with endurance, heralding the unsung heroes: butterfly valves. Not merely ordinary valves, but specifically those that represent innovation and efficiency stand out: soft sealing butterfly valves, electric pneumatic butterfly valves, and pneumatic actuator butterfly valves. Each is vital in industrial fluid control, ensuring seamless, efficient operations. Let’s explore their world, where each turn is critical, and see how they maintain industry’s lifeblood with unparalleled precision and dependability.

Soft Sealing Butterfly Valve: Championing Zero-Leak Operations

The soft sealing butterfly valve excels with its unique sealing method. It features a flexible, soft seat crafted from materials such as EPDM, NBR, or PTFE. Its design shines in tight-sealing applications, crucial for preventing leaks of fluids or gases.

In What Applications Does the Soft Sealing Butterfly Valve’s Design Excel?

Soft sealing butterfly valves shine in applications demanding tight closure, low leakage, and careful handling of sensitive fluids. Here’s where they stand out:

  1. Hygienic and Pharmaceutical: Using FDA-approved materials, they ensure cleanliness and resist chemicals.
  2. Chemical Processing: They withstand corrosive substances, ensuring containment and preventing cross-contamination.
  3. Water Treatment: They’re effective in treatment and HVAC systems, offering leak-tightness across various conditions.
  4. Pulp and Paper: Ideal for abrasive fluids, they provide durable shutoff, cutting maintenance costs and downtime.
  5. Food and Beverage: They protect food safety by blocking contaminants and reducing product loss during processing.
  6. Power and HVAC: Handling high temperatures and pressures, they’re used in steam and cooling systems with minimal leakage.
  7. Marine and Offshore: Their robust design suits harsh marine environments, resisting corrosion from saltwater.

Electric Pneumatic Butterfly Valves: Innovation Meets Control

Electric pneumatic butterfly valves merge the precision of electric actuators with pneumatic efficiency. They’re fitted with an electric motor that moves the actuator, thereby adjusting the valve disc’s position. Precise control is enabled by the electric actuator, crucial for processes requiring consistent flow rate adjustments.

How Do Electric Pneumatic Butterfly Valves Offer Accurate Control and the Convenience of Remote Operations?

Electric pneumatic butterfly valves present a formidable combination of precise control mechanisms and the convenience of remote operation capabilities.   These two features are central to their appeal in automated industrial systems:

Accurate Control

  • Precision Positioning: Electric actuators are known for their ability to accurately position the valve disk to control the flow rate through a pipeline.   They can modulate the valve’s opening to very fine degrees, allowing for granular control over the process media’s movement.   This precision is especially crucial in applications where the exact flow rate must be maintained to ensure process quality, such as in chemical dosing or temperature regulation in HVAC systems.
  • Modulation Capability: Unlike manual or solely pneumatic solutions, electric actuators can precisely modulate the valve position based on feedback from sensors in the system.   This feedback loop ensures the valve can adjust to changes in the process conditions in real-time, optimizing the flow and pressure conditions as required.

Convenience of Remote Operations

  • Electric actuators integrate smoothly with digital control systems, like PLCs and DCS. This integration enables remote valve control, adjusting flow from afar. It allows for management without physical presence at the valve site.
  • Electric pneumatic butterfly valves support real-time monitoring and data logging through control system interfaces. They enable continuous tracking of valve and process performance, sending alerts for anomalies and logging data for analysis. This aids in predictive maintenance, allows remote management, enhances efficiency, and reduces manual inspections.

Electric pneumatic butterfly valves

Pneumatic Actuator Butterfly Valves: The Power of Air Pressure

When speed and toughness in tough environments are essential, pneumatic actuator butterfly valves stand out. By using compressed air for movement, these valves guarantee strong performance, particularly in settings with high flow rates and corrosive substances.

Pneumatic actuators are favored in places with ignition risks, as they operate without electricity and are naturally explosion-proof. Furthermore, their straightforward design typically leads to reduced maintenance expenses and a prolonged lifespan. These valves are frequently used in chemical processing, the petrochemical industry, and bulk material handling.

What Are the Advantages of Pneumatic Actuators Over Other Types of Actuators?

Pneumatic actuators boast several notable benefits over their electric counterparts:

Strong Environmental Adaptability:

  • Explosion-proof Safety: Suited for flammable and explosive environments, they work with air, reducing spark risks and meeting strict explosion-proof standards.
  • Resilience to Harsh Conditions: More reliable and durable than hydraulic, electronic, and electrical controls in dusty, magnetic, radioactive, and vibrating conditions, they’re less affected by external factors.

Fast Response and High Dynamic Performance:

  • Quick Action: They respond swiftly to control signals, excelling in applications requiring frequent or emergency shutoff.
  • High Acceleration: They often achieve higher acceleration than electric actuators, reaching desired speeds and pressures quickly.

Strong Overload Capacity:

  • Maintenance-free: Designed for no maintenance, they don’t need oil changes or extra lubrication, with a life expectancy of up to one million cycles.
  • Adjustable Torque: By adjusting air pressure, their working pressure and output torque can be easily increased, handling overload situations well, especially when valves face increased startup torque due to deposits or sintering.

Economic and System Simplification:

  • Cost-effective: For on/off or manual valve operations, like in water and wastewater treatment, they offer economic benefits due to low cost, simple structure, and less assembly complexity.
  • Reduced Monitoring and Control Needs: Compared to electric actuators, they only require basic end position sensing and air source treatment, eliminating the need for complex monitoring like over-temperature, torque, or frequency conversion, thus simplifying the overall system.

The triad of soft sealing, electric pneumatic, and pneumatic actuator butterfly valves introduces a suite of forward-thinking solutions tailored to meet the varied demands of modern industrial endeavours.  By offering distinctive advantages in seal integrity, control sophistication, and operation speed, these valves empower professionals to refine process management, elevate operational efficacy, and guarantee safety in myriad applications. Please contact us if you are interested. We look forward to hearing from you.

Operation and Application of Main High-performance Butterfly Valves

Operation and Application of Main High-performance Butterfly Valves

Delve into key attributes of high-performance butterfly valves meticulously crafted to fulfill the stringent requirements of vital applications, emphasizing reliability, precise shut-off capabilities, and enduring durability.

China butterfly valve

Soft sealing butterfly valve

Design and Operation:

The valve consists of a disc, often referred to as the “butterfly,” positioned perpendicular to the flow direction. This disc is connected to a shaft, enabling rotation for flow regulation. Soft-sealing butterfly valves utilize a soft seal, typically made from rubber or elastomer, to ensure a tight shut-off and minimize the possibility of leakage.


These valves find use in various industries:

  • Chemical Processing: Demonstrates exceptional resistance against corrosive fluids.
  • Water Treatment: Frequently employed to regulate water flow within treatment facilities and distribution networks.
  • HVAC Systems: Manages air and water flow within heating, ventilation, and air conditioning setups.
  • Food and Beverage: Incorporates a hygienic design tailored to the requirements of the food industry.
  • Power Generation: Exercises control over water, steam, and various fluids within power plant environments.


  • Cost-effective: Generally more affordable than other valve types.
  • Compact design: Lightweight and easy to install.
  • Quick operation: Quarter-turn action enables fast opening and closing.
  • Tight shut-off: Soft sealing ensures minimal leakage.
  • Low maintenance: Simple design with fewer components and long service life.

When selecting a soft sealing butterfly valve, consider factors such as operating conditions, size, and flow capacity to ensure optimal performance.

Double flanged butterfly valve

Design and Operation:

The valve comprises a disc, commonly known as the “butterfly,” affixed to a valve stem. This stem extends through the valve body and links to an actuator or handle. Upon turning the actuator or handle, the disc rotates, either permitting or obstructing the flow. Its double-flanged design entails flanges welded to both the inlet and outlet ends of the valve body.


These valves are frequently employed to control, regulate, and throttle the flow in diverse applications across industries such as water treatment, chemical processing, and HVAC systems.


  • Resilient Seating: The double-flanged design ensures a tight seal, making it suitable for dead-end service.
  • Easy Installation: The flanges allow straightforward connection to pipelines with matching flange sizes.

Remember, double-flanged butterfly valves are versatile and reliable components used in fluid systems for efficient flow control.

Double offset butterfly valve

Design and Operation:

A double-offset butterfly valve is designed with two key offsets compared to the concentric type:

  • First Offset: The shaft is not centered on the disc but positioned slightly behind it. This arrangement creates a continuous sealing surface on the disc.
  • Second Offset: The shaft is not aligned with the pipe centerline but is slightly to the right of the center. When fully open, the valve doesn’t touch the seat at all. This reduces friction compared to concentric valves and prolongs the seat’s lifetime. The 90° rotation of the disc ensures efficient flow control.

Double-offset valves are used in systems requiring higher pressure resistance.


  • Oil and Gas Industry:

Control flow in pipelines, tank farms, and refineries.

Handle crude oil, natural gas, and other hydrocarbons.

  • Power Plants:

Used in cooling water systems, steam lines, and fuel handling.

Resistant to high temperatures and pressure fluctuations.

  • HVAC Systems:

Regulate air and water flow in heating, ventilation, and air conditioning systems.

Efficient for maintaining comfort levels.

  • Food and Beverage Industry:

Handle food-grade liquids in breweries, dairies, and beverage production.

  • Marine and Shipbuilding:

Installed in ballast systems, cooling circuits, and fuel lines.

Resistant to saltwater and marine environments.

Resistant to chemicals and pulp slurries.

  • Steel and Metal Processing:

Handle high-temperature gases and molten metals in steel mills and foundries45.


  • Higher Pressure Resistance: Double-offset valves offer up to a Class 600 ANSI rating in materials like stainless steel, carbon steel, and Hastelloy.
  • Reduced Operating Torque: Easier to open and close due to lower torque requirements.
  • Increased Flow Capacity: Boasts better flow capacity compared to other valve types.
  • Ease of Cleaning: Much easier to clean than gate valves, improving worker efficiency.
  • Compact and Lightweight: Weigh less and occupy less space than other valve types.
  • Longevity and Durability: Suitable for extreme conditions, such as gas pipelines and offshore oil rigs. Adds longevity to different systems and reduces maintenance tasks
Large Size Double Flange Butterfly Valves: A Comprehensive Guide

Large Size Double Flange Butterfly Valves: A Comprehensive Guide

Large size double flange butterfly valves are indispensable components in industrial flow control systems, offering efficient flow regulation, low-pressure drop, and reliable sealing. Their versatility makes them suitable for a wide range of applications across various industries. By carefully considering the selection criteria, engineers and technicians can ensure the optimal performance and longevity of these valves in large-scale industrial operations.

Understanding Large Size Double Flange Butterfly Valves

China industrial Eccentric Half Ball Valve manufacturers

Large size double flange butterfly valves are specialized valves designed to manage the flow of fluids in pipelines with larger diameters. They feature a circular body with a centrally positioned disc that rotates on a shaft to control the flow. The term “double flange” refers to the presence of two flanges on the valve body, which facilitate secure bolting between the valve and the pipeline. These valves are typically manufactured from durable materials such as cast iron, stainless steel, or alloy steel to withstand the demands of large-scale industrial applications.

Advantages of Large Size Double Flange Butterfly Valves

The use of large size double flange butterfly valves offers several advantages:

Efficient Flow Control: The rotating disc allows for quick and precise regulation of fluid flow, enabling efficient control over fluid movement.

Low Pressure Drop: The streamlined design of the disc minimizes flow resistance, resulting in a low-pressure drop across the valve.

Tight Sealing: The resilient seat ensures a reliable seal, preventing leakage and maintaining system integrity.

Robust Construction: These valves are built to withstand the rigors of large-scale industrial applications, ensuring long-term reliability.

Versatile Applications: Large size double flange butterfly valves find use in a wide range of industries and applications.

Applications of Large Size Double Flange Butterfly Valves

The versatility of large size double flange butterfly valves makes them suitable for various industrial sectors, including:

Water and Wastewater Treatment: These valves are used to control the flow of water and wastewater in large-scale treatment facilities.

Oil and Gas Industry: They play a crucial role in regulating the flow of oil and gas in pipelines and processing facilities.

Chemical and Petrochemical Industry: Large size double flange butterfly valves are essential for handling corrosive and hazardous fluids in chemical and petrochemical plants.

Power Generation: These valves are employed in power plants to control the flow of water, steam, and other fluids.

Mining and Mineral Processing: They are utilized in mining operations to manage the flow of slurries and abrasive materials.

Selection Criteria for Large Size Double Flange Butterfly Valves

Selecting the appropriate large size double flange butterfly valve for a specific application requires careful consideration of several factors:

Valve Size: The valve size should match the diameter of the pipeline to ensure proper flow control.

Pressure Rating: Choose a valve with a pressure rating that exceeds the maximum operating pressure of the system.

Temperature Rating: Consider the temperature range of the fluid to ensure the valve’s compatibility.

Material of Construction: Select a valve material that is resistant to the fluid being handled and the operating environment.

Seat Material: Opt for a resilient seat material that provides a tight seal and resists wear and tear.

Actuation Type: Choose between manual, pneumatic, or electric actuators based on the desired level of automation and control.

As leading valves manufacturer and supplier in China, TWT provides soft sealing butterfly valve and double eccentric butterfly valve, etc. Please contact with us for more information.