Product Overview

ThePneumatic Actuated Wafer Butterfly Valve is a high-performance flow control valve designed for reliable on/off and modulating service in demanding industrial piping systems. Manufactured with a 304 stainless steel disc and a rugged metal hard seal construction, this valve provides exceptional durability, corrosion kuj, and bubble-tight shut-off across a wide range of media including water, air, v, roj, steam, and chemicals. The wafer-type body with compact design installs easily between flanges, requiring minimal space and reducing installation costs. Equipped with a high-performance pneumatic actuator, this valve delivers fast response, precise control, and reliable operation in automated systems. Available in sizes from DN50 to DN1200 (2″ to 48″) with a wide temperature range from -40°C to +600°C, this valve is suitable for a broad spectrum of applications including chemical processing, roj & v, power generation, water treatment, and HVAC systems. It is the trusted choice for engineers and plant operators worldwide.

Pneumatic Actuated Wafer Butterfly Valve

Technical Specifications

Pneumatic Actuated Wafer Butterfly Valve

Key Features

1. 304 Stainless Steel Disc – Superior Corrosion Resistance
2. Metal Hard Seal – High Temperature & Wear Resistant
3. Pneumatic Actuator – Fast Response & Reliable Control
4. Wafer Type Design – Compact & Space-Saving
5. Wide Temperature Range – -40°C to +600°C
6. Multiple Material Options – Customizable
7. ISO 5211 Mounting – Standard Actuator Interface

Working Principle

The pneumatic actuated butterfly valve operates through a simple yet reliable mechanism:

• 1. Actuator Operation: Compressed air is supplied to the pneumatic actuator. For double-acting actuators, air enters one side to open the valve and the other side to close it. For spring-return actuators, the valve is opened or closed by air pressure and returns to the fail-safe position when air supply is lost.
• 2. Valve Operation: The actuator drives the stem, which rotates the disc 90° from fully closed to fully open. The disc provides bi-directional sealing against the seat.
• 3. Control Options: The valve can be controlled by a solenoid valve (on/off control) or a positioner (modulating control with 4-20mA or 0-10V signal).

Pneumatic Actuated Wafer Butterfly Valve

Applications

1. Chemical Processing
2. Roj & Cov Raj Xa Hluav Taws Xob
3. Power Generation
4. Dej & Wastewater Treatment
5. h & District Heating

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Packing depends on the product type and quantity. Options include wooden crates or carton boxes with proper protection for actuator and valve body. Shipment can be arranged by sea, los ntawm kev tsheb nqaj hlau, air, or as per customer’s request.

Pneumatic Actuated Wafer Butterfly Valve

Company Profile

Luoyang Datang Energy Tech Co., Ltd is a professional industrial valve supplier, dedicated to providing reliable flow control solutions for chemical, roj & v, power generation, water treatment, h, and industrial piping systems worldwide. All products are manufactured to international standards with CE and ISO 9001 certifications. With over 10 years of experience, a modern facility of 80,000 m², thiab 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

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Pneumatic Actuated Wafer Butterfly Valve

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Q1: What is the difference between pneumatic and electric actuators?

A: Pneumatic actuators are driven by compressed air, offering fast response, high thrust, and excellent explosion-proof capabilities; they are suitable for hazardous areas and frequent operation. Electric actuators are powered by electricity, offering higher precision and eliminating the need for an air supply; they are suitable for locations lacking compressed air systems. The choice depends on on-site air supply conditions and control precision requirements.

Q2: What is the difference between metal-to-metal (hard) sealing and soft sealing?

A: Metal-to-metal sealing utilizes metal-on-metal contact, capable of withstanding temperatures up to 600°C; it is wear- and corrosion-resistant, making it suitable for high-temperature steam, hot oil, and abrasive media. Soft sealing (EPDM/PTFE/Viton) provides bubble-tight sealing but has a limited temperature range (typically ≤200°C). The choice depends on the medium’s temperature, siab, and corrosiveness.

Q3: Do pneumatic actuators support explosion-proof requirements?

A: Yog. Pneumatic actuators do not generate electrical sparks and are inherently explosion-proof. When paired with explosion-proof solenoid valves and positioners, the entire valve assembly meets explosion-proof zone requirements (Exd/Exia), making it suitable for hazardous environments such as petrochemical plants.

Q4: How is automated control achieved with pneumatic butterfly valves?

A: Pneumatic butterfly valves achieve on/off control via solenoid valves and modulating control via positioners (using 4-20mA or 0-10V signals). The system consists of an air preparation unit (filter-regulator + lubricator), a solenoid valve or positioner, and a pneumatic actuator, allowing for seamless integration into DCS, PLC, and SCADA systems.

Q5: What is the difference between wafer-style and lug-style butterfly valves?

A: Wafer-style butterfly valves are installed between two flanges using through-bolts; they are compact, lub teeb yuag, and cost-effective. Lug-style butterfly valves feature threaded lugs on both sides, allowing them to be bolted individually to flanges; this supports single-sided isolation, enabling the removal of downstream piping without draining the system. The choice depends on installation space and maintenance requirements.

Pneumatic Actuated Wafer Butterfly Valve