TVI Valves

Butterfly Valves

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For over 30 years, TVI has served as a leading provider of high-quality valves and accessories. By leveraging our years of industry experience, global partnerships with renowned butterfly valve manufacturers, and dedication to excellent service, we deliver quality valve solutions to customers across a diverse set of industries with fast turnaround. From assisting in the selection of a product to shipping the product out to the customer, every member of our team is committed to providing the best quality product and services at the greatest value. Among our wide range of valve products available, butterfly valves are one of our key offerings.

Thermoplastic Butterfly Valves from TVI Valves

Thermoplastic Lever Handle Butterfly Valves

Diagram of lever handle butterfly valve

These PVC butterfly valves are available in sizes ranging from 2 to 8 inches and are compatible for use with ANSI B16.5 Class 150 flanges. The smooth, contoured disc design allows for high performance with minimal pressure drops. More features include a spring-loaded 15 position latch lever, working pressures of 150 psi, and torques ranging between 95 to 850 inch-pounds.

Thermoplastic Gear Butterfly Valves (2”-24”)

Small gear type butterfly valves diagram

These gear-type valves feature the same operating mechanisms as the smaller valves but are available in sizes ranging from 2 inches to 24 inches. Their working pressures range from 75 to 150 psi and torques range from 850 to 11,400 inch-pounds.

Thermoplastic Gear Butterfly Valves (28”-40”)

Diagram of large gear type butterfly valve

These gear-type butterfly valves are available in sizes ranging from 28 to 40 inches and also feature wafer style components with a smooth, contoured design. They have epoxy-coated gear actuators and a handwheel to account for the additional force requirements of opening and closing large valves. Their working pressures range from 60 to 75 psi.


Lined Metal Butterfly Valves from TVI Valves

Lined Metal Butterfly Valves: Our selection of lined metal valves are available in wafer butterfly valves and full lug lined variations with gear or lever-operated configurations.

What Is a Butterfly Valve?

Butterfly valves are quarter-turn valves that use a thin disc to regulate or restrict the flow of a fluid in a piping system. By turning the disc to align with the flow of the process fluid, the valve opens fully and allows fluid to flow through the pipe. Turning the discs perpendicular to the flow, closes the valve and prevents fluids from entering or exiting the pipe.

In addition to the disc, the other basic components of a butterfly valve are the stem and seat. The stem transfers motion from the valve handle or actuator to the disc (allowing for operation of the valve), while the seat provides a seal between the disc and pipe flange (allowing for termination of valve operations).

Butterfly Valves vs. Ball Valves

Industry professionals use both butterfly valves and ball valves to control the flow of fluid within a closed system. Both types of valves use quarter-turns to operate. However, they feature different designs. Unlike a butterfly valve, ball valves have a ball with a hole in the middle of the valve. This part turns to open or close the valve hole and allow for fluid movement.

This difference in design significantly influences the performance and best use cases of each valve. For example:

  • Butterfly valves cause some degree of pressure change when they move as the disc is either restricting or allowing fluid movement. However, they are easier to maintain, making them suitable for use in large-scale systems such as municipal water and sewer treatment facilities.
  • Ball valves offer little to no pressure change, making them easier to open. They also provide a better seal, which makes them ideal for regulating gases.

Butterfly Valves vs. Gate Valves

Butterfly valves and gate valves use different operating mechanisms to regulate fluid flow. As explained above, butterfly valves employ a turning disc that restricts or allows fluid to pass through depending on its positioning relative to the flow. Gate valves feature a moving mechanism—i.e., a gate—that slides up and down depending on the movement of the handle wheel.

This difference in design results in:

  • Gate valves producing less pressure change and offering higher sealing capacities than butterfly valves
  • Butterfly valves providing faster operating speeds and greater control over flow rates and pressures

Turn to TVI for Butterfly Valves

With over three decades of industry experience, we have the skills and knowledge necessary to deliver a high-quality, high-performance valve solution that meet all of your fluid system needs. If you need a butterfly valve, contact our team or request a quote today.