Triple offset butterfly valves (TOV) are a type of industrial valve used for fluid control applications. They feature an oblique sealing disc and three concentric seals that create tighter seals and lower operating torque than other types of valves, such as ball, gate, or metal seat designs. This article will explore the advantages of this type of valve, how it works, and its major applications.

Geometric Design

A triple-offset butterfly valve is a highly efficient, durable, and low-maintenance option for a wide variety of processes. Its cam action and right-angled conical design ensure that the seal components will not come into contact until their final degree of closing, enabling repeatable, leak-proof performance and significantly extended valve life. In addition, the absence of cavities between the seal components eliminates clogging, reducing maintenance requirements and the overall cost of ownership.

Unlocking the Benefits of Triple Offset Butterfly Valves: A Comprehensive Guide

The first offset is located in the centerline of the valve body, where it becomes the axis of the seat cone angle. This angled positioning of the valve disc prevents seat damage, maintains the integrity of the sealing surface, and reduces operating torque.

The second offset is located in the centerline of the shaft, which enables the valve stem to be centered over the cone angle. This allows the valve to open and close quickly and provides for easier operation and lower operating costs compared with other valves such as gate or ball valves. Additionally, the top-entry design makes it easy to inspect and replace the valve seat ring without shutting down the pipeline or requiring any special tools.

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