WHY USE A TRIPLE OFFSET BUTTERFLY VALVE INSTEAD OF A BALL VALVE
                     WHY USE A TRIPLE OFFSET 
BUTTERFLY VALVE INSTEAD 
OF A BALL VALVE?
INTRODUCTION
Butterfly valves and ball valves are both used in flow control 
applications, where they can be used to shut off or allow flow 
while also allowing flow regulation in some cases. Both types of 
valves have evolved to perform exceptionally well in specific 
environmental conditions and applications. We examine the 
case for butterfly valve vs ball valve to help you decide which is 
best for your application.
BUTTERFLY VALVES: HOW DO THEY WORK?
Butterfly valves are quarter-turn valves that use a disc in the 
center of a pipe to allow or stop flow. Butterfly valves are 
lightweight and thus require less support, as well as being less 
expensive than other types of valves. There are, however, a variety 
of butterfly valves available, ranging from the basic (concentric) 
option described above to the triple offset butterfly valve design, 
which was developed specifically for use with harsh chemicals and 
in slurry or other dirty flow environments. They have a full, zero-
leakage design that seals bubble-tight, a mechanism that prevents 
clogging, and a shut-off feature that means they will last longer. In 
some ways, a concentric butterfly valve and a triple offset butterfly 
valve design are very different solutions, let alone when compared 
to a ball valve.
HOW WORK BALL VALVES?
A ball valve controls flow through it by using a hollow 
pivoting ball. You can change the size of the aperture and 
thus the amount of flow by rotating the ball within its 
housing. They are typically quarter-turn valves, which 
means that turning the actuator handle 90 degrees provides 
full flow. The valve control handle is typically aligned with 
the ball's aperture, allowing for quick visual confirmation of 
the valve's state.
HOW TO SELECT A BUTTERFLY VALVE VS. A BALL 
VALVE
The primary point of comparison is price; ball valves are 
generally more expensive to manufacture and maintain than 
butterfly valves of equal capacity. Butterfly valves are also 
more difficult to operate under high pressure and flow 
conditions, and they are more prone to leakage. The triple 
offset butterfly valve design, on the other hand, is better 
suited to slurries or liquids with solids in the flow because 
the leading edge allows cutting of potential obstructions. 
Because the valve port can be the full diameter of the pipe, 
ball valves are generally accepted to seal better than 
butterfly valves and do not inhibit flow rates when fully 
open.
When comparing butterfly valves and ball valves, remember 
that while the ball valve may appear to be a better choice 
than the butterfly valve for more generalized applications, 
they are not intended for direct comparison. The triple 
offset butterfly valve design, in particular, was created for 
use in very specific circumstances. Butterfly valves and ball 
valves from industry-leading manufacturers are available 
from BM Engineering Supplies.
If you would like more information on selecting the right 
valve for your application, call us now on 9714-2287694 or 
email [email protected]
Ali Salman Trading Co. LLC
Address: Baniyas Square-14th Rd – Deira Dubai, UAE
Phone:  +9714-2287694
Website:  https://astc-me.com/
Email: [email protected]
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