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In industrial fluid control systems, selecting the appropriate valve type is critical for ensuring efficiency, safety, and cost-effectiveness. Among the most commonly used valves are butterfly valves and gate valves. Although both are designed to regulate or isolate fluid flow, they differ significantly in structure, operation, performance, and application.

A fire fighting grooved butterfly valve is a center-line butterfly valve specially designed for fire water systems, whose most prominent feature is the adoption of grooved clamp connection. Through the standard grooves prefabricated at the end of the valve body, the valve can be quickly and firmly connected to grooved pipes using supporting clamps and rubber sealing rings. This design eliminates the traditional processes of welding, flange butt joint or thread tightening, realizing the rapid assembly and disassembly of the pipeline system.

Butterfly valves are divided into four types according to structural differences: concentric butterfly valves, single‑eccentric butterfly valves, double‑eccentric butterfly valves, and triple‑eccentric butterfly valves. Many users are unclear about the concept of eccentricity, as well as when to use concentric, single‑eccentric, double‑eccentric, or triple‑eccentric butterfly valves, so we would like to share a clear explanation.

This Industrial Guide to Flanged Butterfly Valves focuses on valve selection, highlighting the characteristics of flanged butterfly valves and distinguishing them from other types of butterfly valves. It is intended to serve as a reference for procurement and operational decision-making in industrial sectors such as manufacturing, water treatment, and oil and gas, with a particular emphasis on the significant impact that valve selection has on operational efficiency, safety and long-term costs. The key points are summarised as follows:

A concentric rubber-seated butterfly valve mainly consists of a valve body, disc, stem, rubber seat and actuator. The disc is fixed to the stem, with their centerlines coinciding. Long-term operation, improper operation and harsh medium conditions easily lead to faults, mostly concentrated in the sealing system, stem and actuator. For practitioners with basic industry knowledge, mastering these typical faults and their causes is key to ensuring stable valve operation and reducing maintenance costs.

As a widely used new type of control valve in industrial pipeline control systems, ball valves are favored for their reasonable structure, convenient operation and reliable performance, making them suitable for a variety of working conditions. Their core advantages mainly focus on four dimensions: structural design, operation and use, adaptability, and functional protection. Different types of ball valves have their own prominent highlights, which are analyzed in detail below.

In fluid handling systems—ranging from municipal water distribution networks to industrial pipelines and HVAC systems—air valves are indispensable yet often overlooked components. Their core function is to manage air accumulation and vacuum conditions within pipelines, ensuring system efficiency, safety, and longevity. Contrary to common misconception, air valves do not regulate fluid flow directly; instead, they address the hidden risks posed by trapped air and negative pressure, which can lead to costly equipment damage and operational failures. This article explores the key functions of air valves, grounded in industry standards and technical principles from authoritative sources such as AWWA C512 and ASME guidelines.

In the field of industrial fluid control, manual actuation, as the most basic and prevalent valve driving method, has become the core adaptive driving choice for various butterfly valves, relying on its advantages of simple structure, convenient operation, and stable reliability. Without relying on external power, manual actuators drive the opening and closing of valves through manual operation, and are widely applied in various civil and industrial scenarios. They are compatible with multiple types of butterfly valves, such as concentric butterfly valves, eccentric butterfly valves, metal seated butterfly valves and resilient seated butterfly valves, providing stable and economical basic power support for fluid control. They are an indispensable basic configuration in industrial production and infrastructure construction.

In industrial fluid control systems, butterfly valves are widely used in water supply & drainage, petrochemical, power, metallurgy, HVAC and other industries due to their compact structure, fast opening/closing and low flow resistance. They serve as essential flow control devices in pipeline systems. Among them, resilient seated butterfly valves and metal seated butterfly valves are the two mainstream types. Their differences in sealing structure, material properties and application scenarios become key factors for enterprise selection.

Butterfly valve is a type of valve with a simple structure and quick opening and closing. Its core component is a disc (valve plate) installed on the rotating shaft. When the valve plate rotates parallel to the pipeline, the valve is fully open and the fluid resistance is low; When rotated perpendicular to the pipeline, the valve closes to achieve truncation. It is widely used in pipeline systems such as water treatment, HVAC, petrochemicals, etc. due to its small size, light weight, and flexible operation, especially suitable for flow regulation and cutting in large diameter and low pressure drop situations.