Butterfly Valve Basics

What is a PTFE Lined Butterfly Valve? Complete Guide to Design, Materials, Applications & Selection

2026-07-24

A PTFE lined butterfly valve is a quarter-turn isolation and control valve where all wetted surfaces — the body interior, disc, and sealing surfaces — are protected by a continuous layer of PTFE (polytetrafluoroethylene) or a fluoropolymer lining. This lining provides near-universal chemical resistance, making these valves the definitive choice for highly corrosive chemical processing applications where metal valves would fail within weeks or days.

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What is an AWWA C504 Butterfly Valve?

2026-07-20

Comprehensive guide to AWWA C504 butterfly valves covering standards, pressure classes, design features, seat types, materials, applications, and comparisons with API 609. Essential knowledge for waterworks professionals.

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What is a Double Eccentric Butterfly Valve?

2026-07-17

A double eccentric butterfly valve (also known as a double offset butterfly valve ） is a high-performance flow control valve with dual offset design, delivering zero leakage, low torque & long service life for water treatment, power & chemical pipelines. Learn specs, standards, seat options & actuation solutions.

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Vulcanization Process of Butterfly Valve Seats

2026-07-16

The vulcanization process is the most critical manufacturing step in producing high-quality rubber-seated butterfly valves. Unlike mechanically retained (cartridge) seats that rely on compression fit, a vulcanized seat is chemically bonded to the valve body during a high-temperature, high-pressure molding process. The rubber lining becomes integral to the metal body — it cannot shift, extrude, or blow out under pressure.

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What is a U-Type Butterfly Valve?

2026-07-10

A U-type butterfly valve (also called a U-section butterfly valve or U-shaped butterfly valve) is a distinctive butterfly valve design characterized by its U-shaped body cross-section that accommodates a removable, full-face elastomer or polymer liner. The U-type body design creates a smooth, uninterrupted flow passage with no crevices, dead spaces, or exposed body metal. This hygienic design makes the U-type butterfly valve the standard choice for food and beverage processing etc

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What is a Double Flange Butterfly Valve?

2026-07-08

Welcome to Part 3 of the Butterfly Valve Types Series from Laux Valve. In Part 1, we covered the economical wafer butterfly valve. In Part 2, we examined the lug butterfly valve with its dead-end capability. In this third installment, we explore the double flange butterfly valve — the most robust butterfly valve configuration, designed for heavy-duty isolation, the most demanding industrial and waterworks applications.

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What is a Lug Butterfly Valve?

2026-07-07

Welcome back to the Butterfly Valve Types Series. In Part 1, we covered the wafer butterfly valve — the most economical and widely used configuration. In this second installment, we examine the lug butterfly valve: the preferred choice when dead-end isolation, independent pipe removal, or maintenance flexibility is required.

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What is a wafer Butterfly Valve? Complete Guide

2026-07-07

Welcome to the Butterfly Valve Types Series from Laux Valve. This multi-part series provides a comprehensive technical reference for engineers, procurement professionals, and valve specifiers who need to understand the differences between butterfly valve configurations and select the right type for their application. Each article in this series is designed as a standalone reference. we dive deep into the most common butterfly valve configuration: the wafer butterfly valve.

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LAUX Valve is a trusted OEM butterfly valve manufacturer, delivering customized valve solutions with reliable quality and global service.

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Butterfly Valve: Wafer Butterfly Valve; Lug Butterfly Valve; Double Flange Butterfly Valve; PTFE Lined Butterfly Valve; U-section Butterfly Valve; Grooved End Butterfly Valve; AWWA C504 Rubber Seated Butterfly Valve; Double Eccentric Flange Butterfly Valve

Knowledge Center: Butterfly Valve Basics; Butterfly Valve Material; Valve International Standards; Valve Selection Guide

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