Pneumatic Actuated Butterfly Valve

The Pneumatic Actuated Butterfly Valve is a compressed air-powered butterfly valve. Its core consists of a pneumatic actuator and the valve body. The pneumatic actuator drives the valve plate to rotate 90°, thereby achieving the functions of cutting off or regulating the flow of media in the pipeline. The Butterfly Valve offers faster response and easier operation. It can be used with a positioner for precise control and is widely used in various industrial and municipal pipeline systems, adapting to diverse media transmission needs.

As one of Zhongguan Valve's core products, our Pneumatic Actuated Butterfly Valve continues the high-quality tradition of our butterfly valve products. From raw material procurement to production and processing, and then to finished product testing, every step strictly adheres to industry standards to ensure long-term stable operation and meet the actual operating conditions of different customers.

Features

The core structure of the Pneumatic Actuated Butterfly Valve consists of three main components that work together to ensure stable valve operation. The specific structure is as follows:

• Pneumatic Actuator: As the power core of the valve, it comes in single-acting and double-acting types. Made of aluminum alloy, it is lightweight, high-strength, and provides stable output torque. It can be flexibly selected according to the valve diameter and operating conditions, ensuring smooth valve plate rotation and reliable operation. 
• Butterfly valve body: The valve body is made of cast iron, cast steel or stainless steel, etc. The flow channel is designed to be streamlined and the inner wall is smooth, which can effectively reduce fluid resistance and reduce system energy consumption; the valve plate adopts a circular structure and fits tightly with the valve seat to ensure sealing performance and prevent media leakage.
• Control accessories: Valve positioners, limit switches, solenoid valves and other accessories can be equipped according to customer needs. Positioners can achieve precise adjustment of valve opening, limit switches can provide real-time feedback on valve operating status, and solenoid valves are used to control the action of actuators to achieve automated control.

I. Drive and Control Features

Flexible Drive Method: Employs single-acting or double-acting pneumatic actuators, selectable according to operating conditions. Single-acting actuators automatically reset via spring force in case of air supply interruption, ensuring system safety.

Precise and Convenient Control: Can be equipped with an intelligent positioner, receiving 4-20mA current signals to achieve continuous adjustment of opening from 0% to 100%, with control accuracy reaching ±0.5%-±1%, suitable for high-precision flow control scenarios.

Fast Response Speed: Valve switching time is only 3-10 seconds. For emergency shut-off scenarios, a fully closed model within 1 second can be customized, far superior to traditional electric valves, suitable for operating conditions requiring rapid response.

II. Sealing and Durability Features

Reliable Sealing Performance: Soft seals or metal seals can be selected according to media characteristics. Soft seals can achieve ANSI Class VI zero leakage, while metal seals can achieve ANSI Class IV, effectively preventing media leakage.

High Durability: The valve body is made of high-quality materials, and the valve plate surface can be coated with hard alloy or ceramic coating as needed, making it wear-resistant and corrosion-resistant. The seals are made of high-quality materials, ensuring a long service life and reducing later maintenance costs.

Compact Structure: Small in size and light in weight, weighing only 1/3 to 1/5 of a gate valve of the same diameter, it requires less installation space, is easy to install, and saves installation time and costs.

III. Other Core Features

Low Flow Resistance and Low Energy Consumption: The flow resistance coefficient in the fully open state is ≤0.5, far lower than that of gate valves and globe valves, effectively reducing the energy consumption of pumps, fans, and other power equipment, suitable for high-flow-rate applications.

Wide Compatibility: Adaptable to various media such as water, steam, oil, and acid/alkali solutions, covering different operating conditions such as low temperature, high temperature, and high pressure, meeting the needs of multiple industries.

Easy Operation: Supports both manual (handle, worm gear) and pneumatic operation. Manual operation can be used in emergencies when the air supply is interrupted, ensuring the normal operation of the system.

FAQ

1. What is the required air supply pressure for a Pneumatic Actuated Butterfly Valve?

The standard air supply pressure is 0.4-0.6 MPa. This can be adjusted appropriately based on the actuator model and valve diameter. Please consult our sales team for specific advice based on your operating conditions.

2. How to choose between soft-seal and metal-seal Pneumatic Actuated Butterfly Valves?

Soft-seal types (rubber, PTFE) are suitable for low-pressure, normal-temperature, clean media (such as tap water, food-grade fluids), offering high leakage resistance, potentially reaching zero leakage. Metal-seal types are suitable for high-temperature, high-pressure, particulate-containing, or corrosive media (such as steam, chemical raw materials), offering stronger temperature and pressure resistance. Customers can choose based on their media characteristics and operating requirements.

3. Can you customize large-diameter models of your Pneumatic Actuated Butterfly Valves?

Yes. Our standard production diameter is DN40-DN1600. For larger diameter Pneumatic Actuated Butterfly Valve, please contact our sales team. We will customize production according to your needs, ensuring the product meets operating requirements.

4. What is the product warranty period?

Our Pneumatic Actuated Butterfly Valve has a one-year warranty. During the warranty period, we will provide free repair or replacement services for any quality issues not caused by human error. We also provide long-term after-sales maintenance support.

5. How to install and maintain a Pneumatic Actuated Butterfly Valve?

Before installation, check that all valve components are complete and of the correct model, and that there are no foreign objects inside the valve body. During installation, ensure the valve is aligned with the pipeline, the flange connection is secure, and avoid burning the seals during welding. For daily maintenance, keep the valve clean, regularly check the wear of the seals, replace worn parts promptly, and lubricate the transmission parts regularly to ensure smooth valve operation. Detailed installation and maintenance instructions will be provided.