Notizia

How to Reduce Butterfly Valve Operating Torque

2026-09-02

Operating torque is one of the most important numbers in a butterfly valve specification. It determines actuator size, gear operator ratio, stem diameter, bearing load, and how much effort is required to open or close the valve. A valve that needs too much torque is harder to automate, wears out faster, and can become stuck at the worst possible time.

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Why Is My Butterfly Valve Leaking? 8 Common Causes and Solutions

2026-08-31

A leaking butterfly valve can be a small nuisance or a serious process safety issue. The first step is to identify where the leak is coming from: the seat, the stem or shaft area, the flange faces, or a damaged body or disc. Most butterfly valve leaks fall into a small number of predictable causes, and many of them can be corrected by proper selection, installation, or maintenance.

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Concentric AWWA C504 vs Double Eccentric Butterfly Valve: A Practical Comparison for Waterworks

2026-08-27

For large-diameter water pipelines, treatment plants, and pumping stations, both concentric and double eccentric butterfly valves appear regularly in project specifications. Both can be used in waterworks service, but they solve different engineering problems. A concentric AWWA C504 butterfly valve is a resilient-seated, centered-shaft design built around simplicity and economy.

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API609 Butterfly Valve Standard Explained

2026-08-26

Explaining the API 609 butterfly valve standard — Category A vs Category B, wafer, lug and double flange body types, pressure classes to Class 600, testing requirements and a step-by-step specification guide for industrial butterfly valves.

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Butterfly Valve Materials Guide: Body, Disc, Seat & Stem | Laux Valve

2026-08-18

Butterfly valve material guide: ductile iron vs stainless body, nickel/epoxy/CF8M disc, EPDM/NBR/FKM seats, SS420/17-4PH stems, bushings & standards

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Sealing Principle of Centerline Rubber Seal Butterfly Valve

2026-08-13

How centerline butterfly valves seal: interference fit, seat compression, stem loading, torque analysis, and temperature limits by seat material EPDM, NBR, PTFE, Viton, Silicone.

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EPDM vs NBR Butterfly Valve Seats: Complete Material Selection Guide for Resilient-Seated Butterfly Valves

2026-08-10

The rubber seat is the single most important component in a resilient-seated butterfly valve. It determines the valve's temperature range, chemical compatibility, sealing performance, and service life. Choosing between EPDM and NBR (Buna-N) is the most common seat material decision engineers face — and getting it wrong can mean seat swelling, cracking, or outright failure within months of installation. This guide provides the technical data and selection logic to make the right call every time.

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The U-Section Flanged Butterfly Valve Install on Pipe

2026-08-05

Unlike a wafer valve that is merely "sandwiched" between flanges, the U-section flanged butterfly valve uses captive nuts housed inside the valve body's U-slot to engage fully threaded stud bolts. This allows the valve to be securely clamped to either pipe flange independently — delivering true dead-end service where one side of the pipeline can be disconnected while the other remains pressurized.

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