A butterfly valve controls the flow of liquid through a pipe segment. It works in the same way as a ball valve. A rod runs through the plate and connects to a handle or gear on the Valve’s outside. Rotating the handle or gear causes the vessel to move parallel or perpendicular to the flow.
Lever handle ball valve:
A handle ball valve is a mechanical device that controls the flow of various substances. A ball valve consists of a revolving ball with a bore and a stem. The ball spins when the handle on the stem is open, opening or shutting the Valve. This Valve is also known as a quarter-turn valve. From here, the handle only rotated 90 degrees (quarter turn) to allow or halt media flow. The Valve is open where the handle is parallel to the Pipe; it is off when the handle is perpendicular. Visit this page to learn more about ball valves. It allows for simple visual confirmation of the Valve’s condition.
Lever handle ball valve vs. butterfly handle valve:
The working mechanism of these valves is simple enough. They’re used in domestic, commercial, and industrial applications. It regulates fluid flow at various temperatures and pressures. They’re quarter-turn rotary valves (closed to open at a 90-degree angle). Both valves are operatable with a pneumatic actuator (or manual). Other valve types are more costly. They need more maintenance. Also, they have a shorter lifespan than butterfly and ball valves.
A hollow spherical ball rotates at one or both ends of a ball valve. The ball’s top end is attached to a shaft rotated by a handle to open or close the Valve. The ball’s hole is parallel to the pipe flow when fully opened. Inside Valve’s body, the ball is sat on a seat.
The bore of a ball valve might be less than the pipe diameter, the same as the pipe diameter (full port), or V-shaped. The ball’s design impacts the flow qualities—a pressure drop across a reduced port ball valve. In comparison, a complete port ball valve has almost no pressure loss. For dependable flow control, a V-port design is ideal.
Unlike butterfly valves, ball valves have zero leakage when closed(full close). The Valve’s ball is pushed against the seal by the fluid pressure upstream. It assures a favorable shutdown position. Ball valves do not need a pressure-balancing bypass. They may open when there is a significant pressure difference on both sides of the Valve.
In a butterfly valve, a lever or handwheel rotates a disc. When the disc is off, it is perpendicular to the Pipe’s flow direction. A seal resides inside the valve body and seals the valve disc. A butterfly valve’s flow rate and stem position are almost related(linear relation.
Butterfly valves are usually less expensive than ball valves at higher diameters. They have the least number of parts and are light, so they don’t need much support. The weight advantage of butterfly valves over ball valves at larger pipe diameters is considerable. More leakage occurs when the pressure between the sides of a butterfly valve disc and the seal changes. However, leakage is less common with ball valves. Furthermore, the significant pressure difference in applications involving large pipe diameters makes the Valve difficult to open. It necessitates the installation of a bypass valve to equalize the pressures on both sides before the Valve is open.
There is a pressure loss across the butterfly valve. The disc remains inside the flow even when opened (full open). Butterfly valves are challenging to utilize in pigged process streams. Streams like oil and gas, On/off valves, such as butterfly valves, aren’t excellent for regulating fluid flow.
Clients can choose the best working valve for their applications from the table.
Threaded or flanged connectors come in a variety of shapes and sizes.
With a lug or wafer design, it features a flange sty
|Specification||Ball valve||Butterfly valve|
|Size||Smaller pipe diameters (under DN 50)||Due to its lightweight, it is suitable for higher pipe diameters (above DN 150).|
|Weight||Larger pipe diameters are pretty heavy and may need support.||Lighter weight [even at larger pipe diameters]|
|Cost||When compared to a butterfly valve, it is more costly.||Less expensive than a ball valve, especially for bigger diameters.|
|Flow capacity and control||Both ON/OFF and modulating control are possible with this device.||provide a larger flow capacity, suitable for ON/OFF control|
|Sealing||In process applications with zero leakage, ball valves create a tight seal.||This doesn’t work as a ball valve in sealing.|
|Flow regulations||Due to more outstanding flow management, ball valves are used in proportionality.||It is also limited to on/off and proportional applications.|
|Flow restriction||There is no pressure drop with full port ball valves.||The valve disc restricts the flow, resulting in a pressure decrease.|
|Operating conditions||Ball valves can withstand pressures of 1,000 bar and temperatures of 400°C.||Operates at less than 50 bar pressures and temperatures under 250 degrees Celsius.|
|Leakages||Even when there is a significant pressure differential, the seal is tight.||At a high-pressure difference, vulnerable to leaks|
|Installation space||It takes up more space than a butterfly valve.||need smaller installation space|
|Connection style||Threaded or flanged connectors come in a variety of shapes and sizes.||At a high-pressure difference, it is vulnerable to leaks|