Our triple offset metal seated butterfly valve is available in wafer or lug styles in sizes from 2" to 24". With low friction between the disc and seat and low torque that enables the compact actuator to be mounted. Wide range of use, from water, cryogenic, hydrogen, pulp/paper, chemical plans and... Industrial grade, high flow resilient seated butterfly valve offered in wafer and lug styles. Valve available in 2" - 14" and 14" to 24" that meets ANSI 125# and 150# standards. The construction of a butterfly valve is relatively simple, with the rotation of the valve disc controlling the fluid flow.

Why Everyone Is Speaing Frankly About Butterfly Valve...The Simple Truth Revealed

For applications where a high degree of flow control is desired, this makes the butterfly valve a great choice. Whether you are looking for a manual, electric or pneumatic butterfly valve for an industrial application in Australia, you will find a model that meets your needs in our range. Designed specifically for the waterworks industry, Lineseal® butterfly valves offer the ruggedness and reliability required for buried service and performance. Lower head loss means getting the most from your pumping station dollar. Lower torques mean less costly actuation packages, and the maintenance-free design helps keep your budget under control.

Pneumatic & Electric Butterfly Valve Actuator

Lug-style butterfly valves use threaded tapped lugs to mount the valve to piping flanges using bolted connections. On the other hand, wafer-style butterfly valves don’t have attachment lugs. Usually, they have four holes to align with the connected piping. The seat of the butterfly valve is an area that has various designs based on manufacturers.

PTFE Lined Pneumatic Butterfly Valve

In ASME Class 150 and 300, provide exceptional performance while reducing the total cost of ownership. DeZURIK High Performance zoloto butterfly valve Valves have been successfully applied in extreme services, including high-temperature services, throttling steam control, high-cycle industrial gas, and more. High Performance Butterfly Valves are available in sizes up to 60 inches and temperatures to 700 degrees Fahrenheit. Among so many types of actuated butterfly valves, the manual butterfly valve is our star product. A butterfly valve is a valve used for flow regulation in which the disc takes the form of disk. The disc has a rod passing through it that is connected to an actuator on the outside of the actuated butterfly valve.

butterfly valve design

Titanium Alloy – This type of valve has the highest strength-to-weight ratio as compared with other metal valves. As the stainless steel material is a combination of iron, nickel, chrome (10.5%) and sometimes Molybdenum, it possesses both strong acid endurance and strength of steel. Zero Offset Butterfly Valves – Concentric disk valves have their seals line against the edge of the elastomer lining which ensures tight shut-off. The stem is mounted in a vertical axis at the center of the disk. The stem connects the disc to the actuator, like a shaft connecting a propeller to a motor. Similarly, the rotary action of the stem initiated from the power of the actuator is transmitted to the disc, allowing the close and open position of the valve.

butterfly valve dimensions

While the demands for industrial soft-seated butterfly valves continue to evolve, new features and innovations are needed. At the same time, the fundamental design of the Jamesbury™ Wafer-Sphere™ butterfly valve continues to prove itself in action in many of the most demanding applications. The patented and often imitated double-offset design originated by Valmet's flow control business continues to be the industry benchmark for performance excellence. The quick opening flow characteristic, common to globe valves, inhibits precise control of media particularly at low flow rates. For most applications, high-performance butterfly valves make good control valves because of their modified equal percentage flow characteristic. This curve approximates the linear flow for greater throttling precision and control stability, resulting in decreased process variability.

What Different Types of Butterfly Valves Can I Buy?

Lug style butterfly valves feature a series of protruding lugs around the circumference of the valve body that are designed to align with the holes in pipe flanges on either side of the valve. Bolts from surrounding flanges can pass through the lugs, or in some cases, the lugs are threaded to match the bolt thread and may be installed using a bolt from each side into the lug. Butterfly Valves are a type of quarter-turn valve that feature a pivoting disk mounted on a valve stem that can rotate within the valve body. By changing the position of the disk, control of the flow of fluid through the valve can be achieved. Powered actuators may operate electrically, mechanically, or hydraulically. For larger valve sizes, actuation may be aided by the addition of a gearbox to reduce the torque requirement on the operator.

Plastics & Rubber

The high-performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centerline of the disc seat and body seal , and the centerline of the bore . In double offset butterfly valves, the stem axis is offset behind the seat and body centerlines , The stem axis is then moved further away from the valve’s vertical centerline . When the disc is opened, the seat is lifted away from the seal, reducing friction during the first and last 10 degrees of valve opening and closing. As a result, the valve operates more smoothly, has a better sealing capability, and has a longer service life than a zero offset butterfly valve. When the stem is located right behind the center-line of the disc, the valve is called Single-Offset Butterfly Valve. This design was developed to reduce the disc contact with the seal before full closure of the valve with the aim of improving service life of the valve.

Butterfly Valve Explained

Because they cost less and are lighter weight, the butterfly valve is often preferred over other types of valves. A lug-style butterfly valve used in dead-end service generally has a reduced pressure rating. The same valve mounted with one flange, in dead-end service, has a 520 kPa rating. Such seating’s may be metal-to-polymer or metal-to-metal, and may be designed to satisfy the requirements of fire-tested valves. Lug-style butterfly valves use threaded tapped lugs to mount the valve to piping flanges using bolted connections.

The advantages, components and application of Butterfly Valves

• They can provide an unobstructed flow in the fully open position so pressure loss is minimal. Generating high-quality valve solutions requires a deep insight into market needs. Oilway is Indonesia's leading valve manufacturers and suppliers with clients all over the globe.

How Butterfly Valve works?

Butterfly valve belongs to the family of the quarter-turn valve because the disc is rotated in quarter-turn even if it is open or closed. There is a disc on the rod, when the valve is closed the passage is blocked by allowing a quarter turn, the metal disc used here is known as butterfly which is the main part of the valve. Valvulasfevisa delivers premier products, they are known for Gate valve suppliers, Butterfly valve suppliers, ball valve suppliers, water valve suppliers, and more.

CAD Forum

If you remember the symbol of a globe valve, it has a dark circle in between the triangle, whereas here only circle outline is there. So when you see this type of symbol, better to double check the drawing. The vacuum valve prevents damage to the equipment from negative pressure. Pilot operated relief valve are just working as a relief valve, but are used for large size piping. In this type, a small relief valve is used to operate the main relief valve. This arrangement is cost-effective in the large size relief operation.

Top Options Of Butterfly Valve Drawing

Please note that the parts 10, 11 and 12 may be present only in bigger butterfly valves. Make sure the pipe line is not under pressure and line contents drained properly, before dismantling valve from the system. If the valve is fitted with hydraulic or pneumatic actuator, release the actuator pressure and isolate. Butterfly valves operation is similar to the ball valve, which allows it to close quickly. Butterfly valves are generally preferred because they cost less than other valve designs and are lighter and therefore require less support.

butterfly valve

Brass butterfly valves are typically used in water purification, wastewater treatment, food, and pharmaceutical manufacturing. However, they are not applicable in the handling of water with high amounts of chlorine (e.g., seawater and swimming pool waters) because of the dezincification of brass by chlorine. Due to lower requirements and lighter weight, butterfly valves are generally cheaper. While standard resilient seated valves are not 3A approved, there are many on the market that maintain sanitary connections inside and outside. The body material for the valve can range from Epoxy coated iron to Nylon 11 coated iron to Bronze, 304SS, and 316SS.

butterfly valve design

The structural principle of the butterfly valve is most suitable for the manufacture of large diameter valves. When a butterfly valve is needed to control the flow, the most important thing is to correctly select the size and type of the butterfly valve so that it can work correctly and effectively. Zero offset butterfly valves have resilient soft seats because they depend on the flexibility and deformation of the soft seat during sealing. This causes the disc edges to slide onto the seat, which results in full friction between them during the operation. Since the design requires the seat to be made from a polymeric or elastomeric material, it is limited to lower pressure and temperature ratings.

Save on Butterfly Valves at PlumbersStock

A butterfly valve is named for the rotating disc that opens and closes the valve. They are cheap, lightweight, and are capable of quick shut-off. The disc operates with just a quarter turn on the rod that secures it, which means that it's in the way a little bit when the valve is open. You can also partially open a butterfly valve, which allows you to control different flow rates.

butterfly valve design

Inconel 625 is generally stronger than stainless steel and keeps its tensile strength even at higher operating temperatures. Also, they can withstand high temperatures than stainless steel. For this reason, Inconel butterfly valves are used for applications requiring heavy duty seats such as in handling bulkier fluids. Dead end service means the valve’s downstream flange is removed. For this application, a lug style butterfly valve should be used. A lugged valve has the ability to maintain a reliable body connection even without a downstream flange.

Butterfly Valve Specification Standard : The Ultimate Convenience!

This is because there are less materials and less machining is needed to make a wafer style butterfly valve. Butterfly valves can also be manufactured with further variance, in that they can be flangeless (wafer-type), single-flanged (lug-type), and flanged-end valves. For example,lug butterfly valvescan be inspected, repaired, or cleaned without shutting down the entire system. While wafer butterfly valves do not have this advantage, they are designed to hold a tight seal against dual-directional pressure. While butterfly valves are defined by circular discs that rotate on rods or stems, there are different design variations for this feature.