Butterfly Valves
The butterfly valve derives its name from the wing-like action of the disc, which operates at right angles to the flow. This quarter-turn rotational motion valve is easy and fast to open and close. It is used to stop, start and regulate flow.
Essential Butterfly Valves
Butterfly Valves can be used in wide-open or fully closed positions. In some cases, they can also be used for non-critical throttling applications.
These valves offer an optional seating surface. The disc impinges against a resilient liner, providing bubble tightness with low operating torque.
For example, butterfly valves possess many advantages compared to gate valves, globe valves, and ball valves. They weigh less, take up less space, and are less costly. They are also easy to maintain, consisting of few moving parts and no places to trap fluids.
These valves are ideal for many different fluid services, including those that involve handling liquids with large amounts of suspended solids.
Contact one of our specialists about your specific needs. We aim to respond to your message on the same or next business day.
Butterfly Valve Products
Valve Details
| Item | Details |
|---|---|
|
Body Material |
Cast Ductile Iron |
|
Body Coating |
FBE Coated |
|
Trim |
Stainless Steel (CF8M), EPDM |
|
Pressure Range |
PN21 |
|
Size Range |
DN80-DN1800 |
|
Flange Connection |
AS 4087 / AS2129 Table F / ANSI |
|
End Connection |
- |
|
Options |
Gearbox operated w/hand wheel / Pneumatic/electric actuator / Chain wheel / Shaft extension |
Valve Details
| Item | Details |
|---|---|
|
Body Material |
Carbon Steel |
|
Body Coating |
FBE Coated |
|
Trim |
Stainless Steel (CF8M), EPDM |
|
Pressure Range |
PN21 |
|
Size Range |
DN80-DN1000 |
|
Flange Connection |
AS 4087 / AS2129 Table F / ANSI |
|
End Connection |
- |
|
Options |
Gearbox operated w/hand wheel / Pneumatic/electric actuator / Chain wheel / Shaft extension |
Valve Details
| Item | Details |
|---|---|
|
Body Material |
Cast Ductile Iron |
|
Body Coating |
- |
|
Trim |
Stainless Steel (CF8M), EPDM |
|
Pressure Range |
PN21 |
|
Size Range |
DN80-DN1800 |
|
Flange Connection |
AS 4087 / AS2129 Table F / ANSI |
|
End Connection |
- |
|
Options |
Gearbox operated w/hand wheel / Pneumatic/electric actuator / Chain wheel / Shaft extension |
Valve Details
| Item | Details |
|---|---|
|
Body Material |
Ductile Iron |
|
Body Coating |
FBE Coated |
|
Trim |
Stainless Steel (CF8M), EPDM |
|
Pressure Range |
PN16 (PN21 Available) |
|
Size Range |
DN80 - DN1800 |
|
Flange Connection |
AS4087 / AS2129 Table E&F / ANSI |
|
End Connection |
- |
|
Options |
Gearbox w/hand wheel / Pneumatic/electric actuator / Chain wheel / Shaft Extension |
Valve Details
| Item | Details |
|---|---|
|
Body Material |
Cast Ductile Iron |
|
Body Coating |
FBE Coated |
|
Trim |
Stainless Steel (CF8M), EPDM |
|
Pressure Range |
PN16 |
|
Size Range |
DN50-DN1200 |
|
Flange Connection |
AS2129 Table E / Other Available |
|
End Connection |
- |
|
Options |
Gearbox Operated w/hand wheel / Pneumatic/electric actuator / Chain Wheel / Shaft Extension |
Valve Details
| Item | Details |
|---|---|
|
Body Material |
Cast Ductile Iron |
|
Body Coating |
WCB |
|
Trim |
316 Stainless Steel (CF8M) |
|
Pressure Range |
PN16 / PN21 |
|
Size Range |
DN50-DN1200 |
|
Flange Connection |
AS4087 / AS2129 Table D & E / ANSI |
|
End Connection |
- |
|
Options |
Gearbox, Chainwheel, Lever, Pneumatic/Electric actuator Shaft Extension / NBR. Viton, PTFE Seats |
Butterfly Valve Technical Sheets
Our commitment to industry to supply quality butterfly valves, we have made these technical sheets available. If you need further information or can’t find the sheet you need, please make a technical enquiry.
- JOHN Fig 843 Wafer Butterfly Valve 50mm to 300mm
- JOHN Fig 843 Wafer Butterfly Valve 350mm to 600mm
- JOHN Fig 844 Lugged Butterfly Valve 50mm to 300mm
- JOHN Fig 844 Lugged Butterfly Valve 350mm to 600mm
- JOHN Fig 845 Butterfly Valve 80mm to 1200mm
- JOHN Fig 846 Lugged DN50-DN100
- JOHN Fig 846 Lugged DN150-DN350
- JOHN Fig 846 Lugged DN400-DN450
- JOHN Fig 847 Lugged Butterfly Valve DN50-DN150
- JOHN Fig 910 Double Flanged Butterfly Valve
Excellence in the Design & Engineering
At John Valves, our butterfly valves exemplify excellence in design and engineering, underpinning our commitment to superior quality and innovation. Precision-engineered for optimised flow control, these valves boast a durable build, capable of enduring harsh conditions while maintaining consistent performance. Their innovative design is highlighted by a compact, lightweight structure, making them ideal for space-limited applications and ensuring ease of installation.
Adapting to diverse needs, our range includes various configurations like wafers, lug, and double-flanged styles, each tailored for specific operational environments. Emphasising sustainability, our eco-friendly valves contribute to energy efficiency and safety, aligning with high industry standards. This excellence stems from our ongoing investment in research and development, fueled by a feedback-driven approach to refine our products continuously.
Choosing John Valves means partnering with a brand dedicated to delivering reliability, efficiency, and cutting-edge solutions in valve technology.
Operation Mechanism
The operation mechanism of John Valves’ butterfly valves is ingeniously simple yet highly effective, embodying the principles of efficient design and functionality. At the heart of each valve is a disc that rotates on a diametrical axis within the pipe, akin to a butterfly’s wings — hence the name. This disc is connected to an actuator or a handle outside the valve, facilitating a quarter-turn rotational movement.
This design allows for rapid opening and closing, offering precise control over the fluid flow with minimal effort. The quarter-turn motion ensures quick responsiveness and significantly reduces wear and tear, enhancing the valve’s longevity. The sealing mechanism, where the disc meets the valve body, is meticulously crafted to ensure a tight seal, preventing leaks and ensuring reliable operation under various pressure conditions.
This operational simplicity and robust construction make our butterfly valves a preferred choice for various applications, from industrial fluid management to commercial systems requiring precise flow regulation.
Advantages of Butterfly Valves
Rapid Operation
The quarter-turn design allows for swift opening and closing, enabling efficient fluid flow control, which is crucial in time-sensitive applications. These valves provide exceptional flow rate and pressure control, making them ideal for applications requiring fine adjustments.
Space and Weight
Their slim profile makes them suitable for systems where space is premium without compromising functionality. Lighter than traditional valve types, they reduce the overall system load, facilitating easier installation and handling.
Cost-Effective Solution
Compared to other valve types, butterfly valves are more cost-effective in terms of initial investment and long-term maintenance. The simplicity of their design means fewer moving parts and less wear, translating into lower maintenance costs over time.
Versatility
Suitable for various mediums, including liquids with suspended solids, making them versatile for different industrial uses. Available in several styles like wafers, lugs, and double-flanged, they can be tailored to specific system requirements.
Durability and Reliability
Built to withstand harsh environments and continuous usage without significant degradation. The quality of materials and construction ensures a prolonged operational lifespan, reducing the need for frequent replacements.
Industry Uses
The flexible design of butterfly valves renders them apt for a broad spectrum of industries. Their proficiency in flow management, coupled with their sturdiness and dependability, marks them as a top selection for diverse applications.
From regulating basic fluid flows in residential settings to controlling intricate and potentially hazardous substances in industrial scenarios, the adaptability of butterfly valves is paramount. Essential characteristics like the simple quarter-turn motion for swift opening and closing, the secure sealing to avert leaks, and the ability to endure high pressures and temperatures, position them as a favored choice across many sectors.
Common industries that extensively use butterfly valves include:
Oil and Gas Industry
Crucial in pipeline control and refining processes for oil and gas management.
Chemical Processing
Suited for handling corrosive substances and precise flow management in batch processing.
Water and Wastewater Treatment
Ideal for flow regulation and handling of sludge in treatment plants.
Food and Beverage Manufacturing
Essential in sanitary processes and fluid management in food production facilities.
Pulp and Paper Industry
Effective in managing the flow of pulping chemicals and water in paper production.
Mining & Minerals
Robust for handling abrasive slurries and process control in mining operations.
Power Generation
Utilised in cooling systems and steam distribution for efficient power plant operation.
HVAC Systems
Key in temperature regulation and enhancing energy efficiency in heating and cooling systems
Latest Articles
5 Types of Valves Used in Wastewater Treatment Plants
Wastewater treatment plants are pivotal in maintaining the health of...
Read More
Butterfly Valve Installation and Maintenance Procedure
We will discuss the butterfly valve installation and maintenance procedure,...
Read More
List of Basic Types of Butterfly Valves and Their Installation
Butterfly valves are made from various materials depending upon the...
Read More
Is It OK to Use Butterfly Valves as Control Valves?
The answer depends on the application and the amount of...
Read MoreFrequently Asked Valve Questions
If would like to know more, please get in touch and we’ll be happy to answer your questions.
What is a Butterfly Valve?
A butterfly valve is a type of flow control device, used to regulate or isolate the flow of a fluid. It consists of a rotating disc inside a pipe, which can be turned to allow, block, or throttle flow.
How Does a Butterfly Valve Work?
A butterfly valve works by rotating a disc 90 degrees around its axis to open or close. When the disc is turned parallel to the flow, the valve is open, and when perpendicular, it is closed, allowing for quick and efficient flow control.
What are the Advantages of Using a Butterfly Valve?
Butterfly valves offer several advantages, including compact design, light weight, cost-effectiveness, and ease of operation. They require less space and are easier to install and maintain compared to other valve types.
Where are Butterfly Valves Typically Used?
Butterfly valves are widely used in various industries, such as water and wastewater treatment, oil and gas, chemical processing, power generation, food and beverage, HVAC systems, mining, and the pulp and paper industry.
What are the Different Types of Butterfly Valves?
The main types of butterfly valves include wafer, lug, and double flanged. Each type has specific features and is chosen based on the application’s requirements and piping system.
Can Butterfly Valves Be Used for Throttling?
Yes, butterfly valves can be used for throttling purposes. They allow for precise control of flow, making them suitable for applications where flow needs to be adjusted regularly.
How Do I Choose the Right Butterfly Valve?
Choosing the right butterfly valve depends on several factors, including the type of fluid, pressure, temperature, and the specific requirements of the application. It’s important to consider the valve’s material, size, and type based on these factors.
What Maintenance is Required for Butterfly Valves?
Butterfly valves generally require minimal maintenance. Routine checks include inspecting for leaks, ensuring the disc operates smoothly, and verifying that seals and seats are intact. Regular lubrication may be required for the valve stem.
How Long Do Butterfly Valves Last?
The lifespan of a butterfly valve depends on its usage, environment, and maintenance. Generally, with proper installation and maintenance, they can last for many years without the need for replacement.
Are Butterfly Valves Suitable for High-Pressure Applications?
Butterfly valves can be used in high-pressure applications, but their suitability depends on the design and material of the valve. It’s important to select a valve that is specifically rated for the pressure requirements of the system.
