Comparing Cast Iron Butterfly Valves and Center Line Butterfly Valves

May 12, 2023 | News

Butterfly valves are a common type of valve used for flow control and isolation in many industries. They come in two main constructions: cast iron butterfly valves and center line butterfly valves.

Benefits Of Cast Iron Butterfly Valves:

Cast iron butterfly valves have a one-piece cast iron body with an integrated disc shaft. The disc shaft is cast along with the body, providing a tight seal. This design offers several advantages:

The integrated shaft provides a bubble-tight shutoff due to the tight manufacturing tolerances.

The one-piece construction makes the valve robust and durable for heavy-duty applications.

There are fewer parts and sealings to replace compared to center line valves.

Advantages Of Center Line Butterfly Valves:

Center line butterfly valves have a two-piece design with a disc shaft that runs through the center line of the disc. They offer the following advantages:

The two-piece construction makes the valve lighter than cast iron valves.

The disc can be removed easily for maintenance by taking out the shaft.

Less torque is required to operate the valve due to the lower moving mass.

What Is ggg50 Butterfly Valve?

The “ggg50 butterfly valve” is a type of valve that is commonly used in various industrial applications to regulate or control the flow of fluids or gases. “ggg50” refers to the material used to construct the valve body, which is a type of ductile iron that has a minimum tensile strength of 500 MPa and a minimum elongation of 7%.

ggg50 Series Is One Types Of Cast Iron Butterfly Valves?

The butterfly valve gets its name from the design of its disk, which is shaped like a butterfly and rotates around a central axis perpendicular to the direction of flow. When the disk is turned to a certain angle, it allows for the flow of fluids or gases through the valve. And also when it is turned to another angle, it restricts or stops the flow.

Butterfly valves are often as used in applications where tight shutoff is not required. For example for controlling the flow of water, air or other non-corrosive fluids. They are also commonly used in HVAC applications, chemical processing and water treatment plants.