About M.A. Stewart & Sons Ltd.

M.A. Stewart & Sons Ltd.

M.A. Stewart & Sons Ltd. (MAS) has developed a full line of private label “MAS” valves, including Brass, Bronze, Carbon, Low Alloy and Stainless Steel Ball and Butterfly valves. Special options include NACE, API 607 Firesafe, ASME B16.34, CSA, NSF in NPT & solder, as well socket weld, butt-weld & flanged end connections for industrial applications. In 1988, M.A. Stewart & Sons Ltd. entered into a 50% Joint Venture Agreement (JVA) with a Taiwan based valve manufacturer to produce the MAS brand valve solely for M.A. Stewart & Sons Ltd. group of companies. In 2005, the company moved its operations from Taiwan and is currently manufacturing all products in Fuzhou, China.

M.A. Stewart & Sons Ltd. offers a trend-setting 3 year limited warranty on all MAS branded products.

Download Catalogues

MAS Line Card

1.53 MB / PDF

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MAS Product Guide

28.87 MB / PDF

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MAS Butterfly Valves


Link to PDF
MAS W Series

7.48 MB / PDF

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MAS/RWV Balancing Valves Coming Soon - Contact Branch for Details


Product Information
MAS ML Series

5.50 MB / PDF

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