Valve Selection and Installation Guides
Practical guidance written for the people who specify, buy and install these valves. No marketing copy.

How To Choose Between Wafer and Lug Butterfly Valves
The body style decides whether the valve can hold the line on its own. Here is how to pick without guessing.
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Resilient Seated or Metal Seated Gate Valves
Soft seat or metal seat changes sealing behaviour, maintenance and service life. A practical comparison.
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Dual Plate Check Valve Selection Guide
How to size and select a wafer dual plate check valve so it closes before the flow reverses.
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Installing a Wafer Butterfly Valve Between Flanges
The installation sequence that avoids seat damage, disc fouling and leaking joints on first pressure test.
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Rubber Expansion Joint Selection and Installation
Movement, anchoring and control units explained for pump connections and pipe runs.
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Dismantling Joints in Pump Station Pipework
Why a dismantling joint saves a cut-and-weld job every time a valve or meter has to come out.
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Valve Selection for Water Treatment Plants
Which valve family belongs on each part of a treatment works, from raw water intake to final pumping.
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Butterfly Valve Actuator Selection
Lever, gearbox, pneumatic or electric: matching the drive to diameter, duty cycle and control system.
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How To Read a Valve Model Code and Order Correctly
What a model code does and does not tell you, and the five facts to send with every enquiry.
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Preventing Seat Leakage in Butterfly Valves
Where butterfly valve seats actually fail and what to change in specification or installation.
Read the guideQuestion Not Covered Here
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