Boylston Twenty-First Century

Boylston Twenty-First Century has been purchased by Valve Check, Inc. Valve Check, located in Minnesota, has been a leader in valve manufacturing and distribution for 18 years and our dedicated staff brings over 50 years of industry experience.

Boylston 21st Century, formerly known as Boylston Steam Specialties since its establishment in 1888, stands as the premier name in the steam valve industry. With a rich legacy spanning over a century, we have consistently set the benchmark for excellence in Pressure Reducing Valves (PRVs) that guarantee longevity and unparalleled performance. Our commitment to surpassing industry standards reflects in every valve we produce, ensuring unmatched quality and reliability. Choose Boylston 21st Century for PRVs that stand the test of time and deliver optimal performance for all your steam system needs.

Pressure Relief Valves

Figure No. 90

Boylston 21st Century’s Pressure Reducing Valves offer versatile pressure adjustment within a 15 lbs. range, with sizes ranging from 1/2″ to 2″, suitable for various industries including heating, plumbing, marine, and more, featuring extra heavy cast bronze construction for durability and precise control.

Figure No. 205

Boylston 21st Century’s No. 205 Regulator, featuring semi-steel bodies suitable for 250 PSI steam pressure, offers precise regulation for steam and air pressures in high-pressure power plant service, with single-seat construction ensuring tight closure and parabolic main disc design preventing excessive wire-drawing, equipped with stainless steel trim and easily replaceable parts for efficient operation.

Figure No. 390

Boylston 21st Century’s No. 390 Regulating Valve offers precise dead-end regulation for steam, air, or water applications, featuring standard and extra heavy flanged bodies suitable for pressures up to 250 lbs. per square inch, with reduced pressures ranging from 125 lbs. down to 5-10 lbs. per square inch, making it ideal for laundry equipment, cookers, and hot water heaters.

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What our Customers Say


Goetze’s Candy Co. Baltimore, MD

“I am very happy with the Boylston brand regulators. I recently had to replace a Figure 90 Steam PRV that had been in this location for at least 30 years.”

Pipe Fitters and Steam Distribution Shop

University of Illinois Champaign, IL

“I am very pleased to know that Boylston is still around. We have several pressure regulating valves that have been in service for over 40 years and are still working beautifully. I am also happy to know replacement parts are now readily available. Best of all though is how reasonable your rebuild service is, and who ever heard of getting a one-year warranty on a 40 year old rebuilt valve! It’s great to see that Boylston will never sacrifice the quality of their products or their great customer service!”


Great Lakes Naval Base, Great Lakes, IL

“When we first heard that Boylston was going out of business, it was a shock. We didn’t look forward to having to replace your valve with the competitions model. We have used Boylston forever and we knew the quality of these valves. Basically there is no, and will never be a comparison. Now that Boylston is back we won’t specify anything else.”