Pneumatic Wafer Butterfly Valve

Liangfa's Pneumatic Wafer Butterfly Valve is designed for automated flow control in water treatment, HVAC, drainage, fire protection, and industrial pipeline systems. Its compact wafer-style body fits between two pipe flanges, helping reduce installation space and overall pipeline weight. The pneumatic actuator rotates the valve disc by 90 degrees for quick opening and closing, making it suitable for remote operation and automated process control.

As a high-tech enterprise, Liangfa offers different valve body, disc, stem, and sealing materials to meet specific operating conditions. Customers can also select suitable pneumatic accessories according to their control requirements, pipeline specifications, and project standards.

Compact Design for Pipeline Installation

The wafer connection allows the valve body to be clamped between compatible pipeline flanges using bolts. Compared with bulkier valve configurations, this design is useful for installations where space, weight, and maintenance access need to be considered.

The concentric soft-sealing structure helps provide reliable shut-off under suitable operating conditions. During operation, the disc rotates within the valve body to regulate or stop the flow. Correct flange alignment, suitable gasket selection, and proper installation are important for maintaining sealing performance.

Pneumatic Actuation and Control Options

The pneumatic actuator converts compressed-air energy into rotational movement, allowing the valve to operate without manual turning. Liangfa can configure the assembly for different automation requirements.

• Double-acting actuator: Uses compressed air for both opening and closing.
• Single-acting actuator: Uses compressed air in one direction and a spring for return movement.
• Solenoid valve: Controls the air supply signal for automatic switching.
• Limit switch box: Provides open and closed position feedback.
• Valve positioner: Supports modulating control when compatible with the selected actuator and control system.
• Air filter regulator: Helps regulate and condition the compressed-air supply.

For safety-related applications, the required fail-open or fail-closed position should be specified before ordering. Actuator torque must also be selected according to valve size, differential pressure, seat friction, and actual operating conditions.

Material and Seat Selection

The correct material combination depends on the medium, temperature, pressure, and corrosion conditions. Liangfa offers several options for project-specific selection.

EPDM is commonly considered for water-based services, while NBR may be suitable for selected oil-containing media. PTFE and FKM may be considered for certain chemical or higher-temperature applications. Actual compatibility depends on the exact medium concentration, temperature, pressure, and material grade, so confirm these conditions before selecting the seat.

Technical Specifications

The final size range, pressure rating, temperature limits, flange drilling, and actuator specifications should be confirmed against the selected model and approved technical drawing.

Applications Across Industrial Systems

Water Supply and Wastewater Treatment

The valve can be used for flow isolation and control in water distribution, drainage, and sewage treatment systems when the selected materials meet the operating requirements.

HVAC and Cooling Systems

In compatible circulating-water systems, pneumatic actuation supports remote operation and integration with building or plant control systems.

Fire-Water Pipelines

The Pneumatic Wafer Butterfly Valve may be considered for automated flow isolation where the selected configuration meets the applicable project specifications and fire protection requirements.

Industrial Ventilation and Process Pipelines

It can control compatible air and gas flows or selected industrial liquids. For steam, abrasive slurries, high-concentration chemicals, or other demanding media, confirm whether a soft-seated wafer butterfly valve is appropriate before specifying the product.

Installation and Maintenance

Before installation, check that the valve size, flange standard, pressure rating, and sealing materials match the pipeline design. Ensure the pipe flanges are aligned and that the disc can move freely without contacting adjacent pipework. Follow the manufacturer's instructions for bolt tightening, actuator mounting, and pneumatic connections.

During routine maintenance, inspect the seat, stem area, actuator, air lines, and accessories for wear, leakage, loose connections, or abnormal movement. If the valve does not open or close fully, check the air supply, solenoid signal, actuator torque, and possible disc obstruction before replacing components.

Why Work with Liangfa?

Liangfa provides configurable valve solutions for industrial projects with different pipeline and automation requirements. Our technical team can help customers review valve size, operating medium, pressure, temperature, body and seat materials, actuator type, and control accessories before confirming an order.

As a high-tech enterprise, Liangfa supports project-specific configuration and technical communication to help buyers select a suitable valve assembly for their intended application.

Frequently Asked Questions

What information is needed to select the right valve?

Provide the nominal diameter, flange standard, working pressure, medium, temperature, required operating mode, and available air supply. These details help determine the valve materials and actuator configuration.

Can the valve be integrated into an automated control system?

Yes. Depending on the required control method, the assembly can be equipped with accessories such as a solenoid valve, limit switch box, or compatible positioner.

How do I choose between EPDM, NBR, PTFE, and FKM seats?

Choose the seat according to the medium's chemical compatibility and the actual operating temperature and pressure. No single seat material is suitable for every fluid or working condition.

Is the wafer connection suitable for every pipeline flange?

No. The Pneumatic Wafer Butterfly Valve must match the pipeline's flange dimensions, drilling standard, pressure class, and installation requirements. Confirm the applicable connection standard before purchase.