English HOME ABOUT US PRODUCTS MANUFACTURERS RESOURCES CAREERS NEWS CONTACT 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 5.98 MB / PDF DOWNLOAD PDF MAS Product Guide 29.47 MB / PDF DOWNLOAD PDF MAS Butterfly Valves N/A LINK TO PDF MAS/RWV Balancing Valves Coming Soon - Contact Branch for Details N/A PRODUCT INFORMATION MAS ML Series 5.50 MB / PDF DOWNLOAD PDF MAS A Series 990.95 KB / PDF DOWNLOAD PDF MAS B Series 6.75 MB / PDF DOWNLOAD PDF MAS C Series 4.52 MB / PDF DOWNLOAD PDF MAS F Series 5.65 MB / PDF DOWNLOAD PDF MAS G Series 6.00 MB / PDF DOWNLOAD PDF MAS HM Series 3.59 MB / PDF DOWNLOAD PDF CANADA Surrey BRITISH COLUMBIA Phone: 604-594-8431 Fax: 604-594-4335 Toll-Free Phone: 1-800-594-8431 Edmonton ALBERTA Phone: 780-436-9051 Fax: 780-435-0463 Toll-Free Phone: 1-800-232-7376 Ajax ONTARIO Phone: 905-683-7303 Fax: 905-683-9108 Dollard-des-Ormeaux QUEBEC Phone: 514-421-6311 Fax: 514-421-6323 USA Signal Hill CALIFORNIA Phone: 562-595-1811 Fax: 562-426-6016 San Diego CALIFORNIA Phone: 619-233-0118 Fax: 619-544-0162 Privacy Statement Terms and Conditions Terms of Sale Product Service Report Line Card Please note that the information on this website is subject to change and is listed for informational purposes only and should not be considered complete. Copyright © 2021 M. A. Stewart & Sons Ltd. Website designed and crafted by Unique Web Development.