Butterfly valve needs a much less structural assistance than a ball valve of same diameter needs. Butterfly Valve is available in large sizes, ranging from NPS 1¹⁄₂ (DN 40) to over NPS 200 (DN 5000). A ‘cam’ is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion or vice versa. LongChang Science Park, Dongguan, China It’s also important to note that you don’t need to shut down the entire system in order to clean, inspect, repair, or replace a lug butterfly valve (you would need to with a wafer butter valve). It can transfer mud, with a negligible fluid deposit in the pipeline outlet. Advantages and disadvantages of hydraulic system. An in-built simple and affordable design that comprises of lesser parts which make it maintenance friendly and convenient to repair. Positive shut-off cannot be achieved with butterfly valves. It can be operated frequently. July 10, 2020 butterfly valve. The butterfly valve and the butterfly rod have no self-locking capability. Theadvantages of butterfly valves include: In addition to advantages, there are slight disadvantages of butterfly valves like: Butterfly valves are widely used in automobile systems. 6. Often made out of cast iron, butterfly valve’s name is based on the functionality of its disc. The opening position should be determined according to the rotation angle of the disc. The flange type butterfly valve has a flange on the valve, and the flanges on both ends of the valve are connected to the pipe flange by bolts. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. However, the recent usage of latest polymers and increased temperature ratings has made it possible to develop butterfly valves with bubble-tight closure. Essentially, the disc movement depends on the opening or closing of the valve. Manufacturer. 8. 26 Hantang Street, Dongcheng District, Dongguan, China, Copyright © COVNA Group Co.,Ltd All Rights Reserved. The butterfly valve constitutes a metal disc clasped on a rod. The compact design requires considerably less space, compared to gate, globe, or other valves. A rod is passed through the plate which is linked to an actuator on the exterior of the valve. It has a poor sealing function. Butterfly valve with bypass valve, open the bypass valve before opening. This can be executed by using threaded inserts, flanges, along with two sets of lugs (bolts) that don’t utilize nuts since each flange features its own bolts. The butterfly valve can be divided into a bias plate type, a vertical plate type, a slant plate type, and a lever type according to the structure. 5. The wafer type butterfly valve uses a stud bolt to connect the valve between the two pipe flanges. A quarter turn takes the valve from fully open to a fully closed position or the opposite, and thus the butterfly valve allows for quick opening and closure. Butterfly valve refers to a valve in which the closing member (valve or disc) is a disc that rotates around the valve shaft to open and close, and is mainly used for cutting and throttling on the pipeline. Valves can also be used for on-off system or modulating service. Butterfly valves design is made in such a way so as to provide total flow with certain control efficiency. Cavitation and choked flow are two potential concerns. Butterfly valves offer important benefits over different valves in terms of weight, space, and expenses for huge valve applications. Butterfly valves are essential in pipelines by facilitating the flow of water. Its wafer-form lightweight body makes it budget-friendly as far as the initial price of the valve and installation cost with regard to in-person hours and piping need is concerned. When the rotation is 90°, the valve is fully open. Butterfly valve has a circular body along with a rotary movement disk closure member, pivotally held by its stem. Simple structure, small size and lightweight. This is accomplished by using a tightly fitted seal, such as an O-ring, gasket, precision machined, along with a flat valve face on the downstream and upstream sections of the valve. The butterfly valve's disc is mounted in the diameter direction of the pipe. It is fire resistant and is rated till 600#class. Cooling water, air, gases, fire protection. A quarter turn takes the valve from fully open to a fully closed position or the opposite, and thus the butterfly valve allows for quick opening and closure. What are your views on this? A wafer butterfly valve’s function is to retain a seal to protect against dual-directional pressure differential in the flow of fluid. In contrast to a ball valve, the plate is always available inside the flow, which creates a pressure drop in the flow irrespective of the position of the valve. The major butterfly valve types available in the market include: These valves come in wafer or lug styles and require different installation procedures. In the cylindrical passage of the butterfly valve body, the disc-shaped disc rotates around the axis, and the rotation angle is between 0° and 90°. They have low-pressure drop and high-pressure recovery. Some of the advantages for this type of valve are the simple construction not taking up too much space, and the lightweight and lower cost compared to other valve designs. For the positioning of the butterfly plate, a worm gear reducer is added to the valve stem. When the valve is totally open, the disc is quarter turned to provide an unrestricted flow of the fluid. They are used in refineries and in off-shore systems where extreme conditions are prevalent. +86-13724477011 4. under low pressure, can achieve a good seal. Both lug and wafer butterfly valves are used in a number of applications for industrial sectors that include food processing, pharmaceutical, chemical, oil, water as well as wastewater management. Various types of butterfly valves are present and each one of them is suitable for handling a range of pressure and applications. However, the wafer style is more common. 2. An additional seal is also provided by the packing in the event of any damage caused to the resilient seat. 1. They are also used in high-pressure water and steam facilities that require high temperature. http://sabadejlah.com/wp-content/uploads/2018/12/butterfly-valve.jpg, http://sabadejlah.com/wp-content/uploads/2018/10/logoi-ready.png, Butterfly Valve Advantages and Disadvantages, Digital temperature transmitter model T15. The valves can be operated by handles, gears or actuators according to any specific need. Throttling by employing butterfly valves is restricted to low-pressure drop systems. The metal disc or the butterfly is a vital component and is perched on a rod, which stops the passage of liquid when the valve is closed. As the valve is shut, the disc is rotated so as to totally block the passageway. Valve length can be very short. Commonly used butterfly valves are clip-on butterfly valves and flanged butterfly valves. Available in wafer type, lugged type, tri-clamp type and flanged type. For more information about various valves specifically required for your industrial plants / business, Contact Flowspec and we will be happy to answer your questions and give you all the details you need. The operation of a butterfly valve thus always leads to a pressure switch over the valve irrespective of the setting. Stainless steel and cast iron material options. Click here to contact us! The resilient butterfly valve that is based on the elasticity of rubber contains the lowest pressure rating. Designed by LinkEC, No.1 The Advantages Of the Butterfly Valve, No.2 The Shortcomings Of The Butterfly Valve, No.3 Butterfly Valve Installation And Maintenance, 5 Advantages Of Butterfly Valve And How To Maintain It. [email protected], 20 Years Experience When installing, the valve flap should be stopped at the closed position. Further, if the valve is totally open and there is 90 degrees rotation of the disc, in that case, a greater quantity of air or fluid will flow through. Advantages: 1. The heavy butterfly valve should be provided with a solid foundation. It functions by completely opening or shutting down itself as the disc rotates a quarter turn. 4. Address: Building C, Longchang Micro-Chuangyuan, No. Butterfly Valve disc movement guides and affects by flow turbulence. Besides, vacuum service, cooling and circulating water systems also need butterfly valves. Advantages and Disadvantages of the Application of Butterfly Valves. subscribe to our newsletter. Quick acting; as a quarter-turn valve, it requires less time to open or close. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. According to the sealing form, it can be divided into two types: a relatively sealed type and a hard sealed type. The lug version of the butterfly valve’s design is similar to a 3-piece ball valve in that one end of the line can be taken off without having an effect on the opposing side. Various components of butterfly valve include an outer case or body, a butterfly disk, stem, a rugged positioning plate, packing plus an actuator. Likewise, the high-performance ones are used in high-pressure systems. Its disc is light-weight when compared to a ball. 7. It’s important to note that pipelines that contain butterfly valves can’t be ‘pigged’ for cleaning. This butterfly valve is best suited for managing higher temperature up to 1200 degree F and higher pressure applications. The actuators applied on butterfly valves differ on the grounds of size and use of the valve. It is convenient, quick, labor-saving, and has low fluid resistance. Butterfly Valve Advantages and Disadvantages. 1. In the cylindrical passage of the butterfly valve body, the disc-shaped disc rotates around the axis, and the rotation angle is between 0° and 90°. The packing ensures a strong seal that surrounds the stem and gives it extra protection in an event when the seal created by the seat gets damaged. If the butterfly valve is required to be used as flow control, the main choice is to correctly select the size and type of the valve. The characteristics of the industrial special butterfly valve can withstand high temperature, the applicable pressure range is also high, the valve has a large nominal diameter, the valve body is made of carbon steel, and the sealing ring of the valve plate uses a metal ring instead of the rubber ring. Besides, some of their types like Triple Offset are used in oil, gas, petrochemical, power, chemical and marine industries. The application of butterfly valves in firefighting pipes and tubes is best known due to their easy throttling facilities and adequate pressure limits. They achieve good sealing at low pressure and open and shut easily. 3. can transport mud, the least amount of liquid accumulated in the pipe mouth. Butterfly valves play an important role in pipelines by helping in controlling the water flow. Butterfly valves have been around for a long time, and are used for a variety of applications. A certain part of the disc always faces the flow, even when completely opened. How do you ensure that your valves are functioning properly? In such valves, because the seal is formed after the closure of the disc, therefore, less torque is needed to propel the disc to close. ③ General gate valves have two sealing surfaces, which add some difficulties in processing, grinding and maintenance; ④ Long opening and closing time. Large high temperature butterfly valves are manufactured by steel plate welding and are mainly used for flue ducts and gas pipes of high temperature media.