Electric Wafer Butterfly Valve

Product Overview

The Electric Wafer Butterfly Valve is designed for quick installation and reliable performance in automated systems. Its wafer-style body allows for space-saving mounting between pipeline flanges, while the electric actuator provides precise and remote control over flow rates.

Ideal for applications requiring frequent on/off cycles or proportional control, this valve is commonly used in HVAC systems, water treatment plants, chemical processing, and industrial fluid handling. The electric actuator can be configured with various control options, including 4-20mA signals for proportional control.

Constructed with durable materials such as ductile iron or stainless steel, and featuring resilient seats (EPDM, NBR, or PTFE), the Electric Wafer Butterfly Valve offers excellent corrosion resistance and long service life in a wide range of operating conditions.

Key Features & Benefits

Electric Actuation

Provides remote control and automation capabilities, suitable for systems requiring precise on/off or proportional flow control.

Wafer-Style Design

Space-saving, lightweight body allows for easy installation between pipeline flanges, reducing overall system footprint.

Proportional Control Option

Available with 4-20mA or 0-10V signals for precise proportional flow control in automated systems.

Resilient Seating

Offers excellent sealing performance with resilient materials (EPDM, NBR, PTFE), suitable for various media and temperatures.

Easy Maintenance

Modular design allows for quick replacement of the actuator or seat without removing the valve from the pipeline.

ISO 5752 Compliance

Designed and manufactured to meet international standards, ensuring compatibility and reliability in global applications.

Technical Specifications

Basic Parameters

Parameter	Specification Range
Nominal Diameter (DN/NPS)	DN50 ~ DN1200 (2" ~ 48")
Nominal Pressure (PN/Class)	PN10, PN16, PN25 Class 150, Class 300
Operating Temperature	-20°F ~ 350°F (-29°C ~ 177°C)
Applicable Media	Water, Air, Oil, Chemicals, Slurries (with appropriate seat material)
Sealing Class	ISO 5208 Class IV or V

Material Specifications

Component	Material Options	Standards/Features
Valve Body	Ductile Iron, Carbon Steel, Stainless Steel	EN-GJS-400-15, ASTM A216 WCB, ASTM A351 CF8/CF8M
Disc	Ductile Iron, Stainless Steel	EN-GJS-400-15, AISI 304/316
Seat	EPDM, NBR, PTFE, Viton	Corrosion and Temperature Resistant
Shaft	Stainless Steel	AISI 304/316
Actuator	Electric (On/Off or Proportional)	24V DC, 110V AC, 220V AC, 4-20mA Control Option

Standards & Compliance

Design Standards: ISO 5752, API 609
Flange Standards: ISO 7005-1, ANSI B16.5 Class 150/300
Testing Standards: ISO 5208, API 598
Certifications: CE, ISO 9001

Working Principle

The Electric Wafer Butterfly Valve operates using a rotating disc controlled by an electric actuator:

Electric Actuation: The electric actuator receives a control signal (e.g., 4-20mA or digital command) and rotates the valve shaft to open or close the disc.
Opening Process: Rotating the disc to a parallel position with the flow direction allows media to pass through the valve with minimal pressure drop.
Closing Process: Rotating the disc to a perpendicular position blocks the flow path, creating a tight seal against the resilient seat.
Proportional Control: In proportional mode, the actuator adjusts the disc position based on the input signal (e.g., 4-20mA) to maintain a desired flow rate.

Application Areas

HVAC Systems

Heating, ventilation, and air conditioning systems for commercial buildings.

Water Treatment

Municipal water supply, wastewater treatment, and desalination plants.

Chemical Processing

Handling of corrosive and non-corrosive chemicals in industrial plants.

Industrial Fluid Handling

General-purpose flow control in manufacturing and process industries.

Installation & Maintenance

Installation Guidelines

Inspect the valve and actuator for damage before installation. Ensure the valve is in the closed position.
Position the valve between the pipeline flanges, aligning the bolt holes. Use appropriate gaskets to ensure a leak-free seal.
Tighten the flange bolts evenly in a crisscross pattern to avoid uneven pressure on the valve body.
Connect the actuator to the control system according to the manufacturer's wiring diagram. Test the actuator for proper operation before commissioning.
Conduct hydrostatic testing (1.5×PN) and leakage testing after installation to verify performance.

Maintenance Recommendations

Regularly inspect the seat for signs of wear or damage. Replace the seat if necessary to maintain sealing performance.
Clean the valve interior periodically to remove any buildup or debris that may affect operation.
Check the actuator connections and wiring for looseness or damage. Replace any faulty components as needed.
Lubricate the actuator gearbox (if equipped) annually or as per manufacturer recommendations.
For long-term shutdown, flush the valve with clean water to prevent seat hardening or corrosion.

Frequently Asked Questions (FAQ)

Q: Can the Electric Wafer Butterfly Valve be used for throttling applications?

A: Yes, when equipped with a proportional electric actuator (4-20mA control), this valve can be used for throttling applications. However, for precise flow control, consider a control valve with a suitable flow characteristic.

Q: What is the difference between an on/off and proportional electric actuator?

A: An on/off actuator only opens or closes the valve fully. A proportional actuator can adjust the valve position to any point between fully open and fully closed, allowing for precise flow control based on an input signal (e.g., 4-20mA).

Q: What seat material is best for chemical applications?

A: For chemical applications, PTFE or Viton seats are recommended due to their excellent chemical resistance. EPDM or NBR seats may be suitable for less aggressive media. Contact our technical team for assistance in selecting the right seat material for your specific application.

Q: Is the Electric Wafer Butterfly Valve suitable for high-pressure applications?

A: This valve is designed for moderate pressure applications (up to PN25 or Class 300). For high-pressure applications (PN40 or higher), consider a flange-style butterfly valve or another valve type specifically designed for high-pressure service.

Need Custom Solutions?

Our engineering team can customize Electric Wafer Butterfly Valves to meet your specific pressure, temperature, and media requirements. Contact us today for a personalized quote.

Contact Our Technical Team