Butterfly valve parts
- Valve body: The valve body is a component used to join pipe flanges and is typically found in flanged, double lug, and wafer end connections.
- Disc: The valve body features a disk that operates as a gate, stopping or restricting fluid flow, similar to a gate in a gate valve or a ball in a ball valve.
- Seat: The inside valve body is sealed with a strong elastomer or metal anti-leak seal, which keeps the disc securely in place for complete shutdown.
- Stem: The valve shaft, or stem, is a crucial component that connects the disc to the actuation mechanism and transfers torque internally.
- Seals: sealing at valve interfaces ensure tight sealing during operation and segregate process media, allowing for more versatile and cost-effective design options.
Types
- Wafer Butterfly Valve
- Flanged Butterfly Valve
- Triple eccentric Butterfly Valve
- Double Offset Butterfly Valve
- Triple Offset Butterfly Valve
- Lug Butterfly Valve
Can butterfly valve be used for flow control
Yes, butterfly valves are frequently utilized for flow control in various sectors.
- Wider control range than globe or ball valves.
- Cheaper alternative to other valve types.
- Versatile and high-performance valve.
- Used in HVAC systems, water treatment plants, chemical processing, etc.
How does it work?
Butterfly valves provide bidirectional flow and shutdown but are not full-bore, rendering them unsuitable for pigging or swabbing. They work with handwheels, gears, or actuators and are built of ductile iron with an epoxy powder coating.
What is a butterfly valve used for?
Butterfly valves start, slow, or halt flow with a low-torque, 90-degree spin. They are preferred because of their low cost and lightweight design. They can survive harsh temperatures and corrosion, ensuring the seal's integrity, which is critical in high-risk applications such as energy production and petroleum processing. A leak could endanger public safety or the environment, hence the butterfly valve is the ideal option.
Butterfly valve actuation
- Electric actuators operate valves via a 4-20mA control signal, making them excellent for high-precision regulation and time-sensitive applications.
- Pneumatic: Used for high-precision applications that require compressed air to operate.
- Hydraulic: Typically used in applications that demand significant torques to open and close the valve, such as high pressure and viscosity applications.
- Manually operated butterfly valves utilize a handwheel, crank, or lever for the regulation of the valve. Smaller manual valves are frequently equipped with a lever.
Types of Butterfly Valve Design
- Disc closure design: Butterfly valves can be concentric or eccentric, depending on the stem's position relative to the disc's centerline and the surface angle of the valve seat.
- Concentric: The most basic type of butterfly valve is the centric or concentric butterfly valve. The stem travels through the disc's midline, whereas the seat is the inside diameter perimeter of the valve body.
- Eccentric: An eccentric butterfly valve stem is placed behind the disc's centerline, reducing the disc's contact with the seal before the valve closes, thereby extending its life and reducing the contact with the seal.
What are the advantages of a butterfly valve?
- Lightweight and compact
- Low maintenance requirements
- Fast Acting
- Low cost
- Versatility
Application
Valvesonly Europe is the High-performance Butterfly Valve Manufacturer in Germany are useful equipment utilized in a wide range of sectors, including, chemicals, oil, food, water supply, wastewater treatment, fire protection, gas supply, fuel handling, and sanitary fittings. They are excellent for handling big materials and liquids under low pressure. Stainless steel butterfly valves are very beneficial in harsh and marine situations because of their endurance and corrosion resistance.
Ball vs. Butterfly Valve
Butterfly valves, like ball valves, are less expensive, easier to install, and need a smaller installation footprint. However, the disc prevents them from being pigged for cleaning. Ball valves are better suited for high-pressure, small diameter applications because of their low pressure drop. Butterfly valves contain fewer moving parts and media pockets, thus they are easier to repair and maintain. Ball valves are better suited for small pipe diameters, with torque and cost advantages evident at DN 50 and higher.
Description
Body Material: Cast Carbon steel (WCC,WCB, WC6), Stainless Steel [SS316, SS304, SS316L, SS904L, CF8, CF8M, F31L, F91], DUPLEX STEEL and Super duplex Steel (F51,F53,F55) , Cast iron, Ductile Iron.
Size – 2” – 48”
Class- 150 to 300; PN 6 – PN 25
Ends- Wafer, flanged, lug
Operations- Lever operated, gear operated, pneumatic actuated and electric actuated.
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