What is the difference  between  ball valves and butterfly valves? Here are some points for your reference, which might be helpful for most ball valve buyers when they select produts.

 

What are Ball Valves & Butterfly Valves?

Ball Valves

Butterfly Valves

1.Main Characteristics

(1) Ball Valves

The main characteristics of the ball valve are its compact structure, easy operation and maintenance. And it’s small in size, volume, and fluid resistance

(2) Butterfly Valves

Butterfly valve has the characteristics of simple structure, small volume, light weight, low material consumption, small installation size, fast switch, 90 ° reciprocating rotation, small driving torque, etc.

2.Working Principles

(1) Ball Valves

The ball valve has the same action of rotating 90 degrees, but the difference is that the cock body is a sphere with a circular through hole or channel through its axis. The ball valve is mainly used to cut off, distribute and change the flow direction of medium in the pipeline. It can be closed tightly only by rotating 90 degrees and a small rotating torque. Ball valves are most suitable for use as switch and shut-off valves, but recent developments have designed ball valves to throttle and control flow, such as V-shaped ball valves.

(2) Butterfly Valves

It is based on the quick shut off principle. The disc of the valve is placed in the center of the pipe which allows a rod to go through it to an actuator, on the outer side of the valve. The disc remains parallel or perpendicular to the flow. A pressure drop is introduced by the disc upon the flow even when open.

3.Typical Applications

(1) Ball Valves

Air, gaseous, and liquid applications requiring bubble-tight service. Low-point drains and high-point vents in liquid, gaseous, and other fluid services. Instrument root valves. Cooling water and feed water systems.

(2) Butterfly Valves

Cooling water, air, gases, fire protection Slurry and similar services Vacuum service High-pressure and high-temperature water and steam services Compressed Air or Gas Applications

4. Advantages&Disadvantages

	The Ball Valve	The Butterfly Valve
Weight	Very heavy	Light weight at even larger pipe diameter
Size	Better suitable for small diameter	Suitable for larger diameter(above DN 150)
Leakage	Provides tight seal	Prone to leakages at a high -pressure difference
Cost	More expensive	Cheaper than a ball valve

For more information, please find our website: http://www.clvvalve.com