Tri-Seal
Tri-Seal: American-Made High-Performance Butterfly Valves
Tri-Seal, a McWane Plant & Industrial brand, is a leading U.S. manufacturer of high-performance butterfly valves engineered for critical service applications across power generation, marine, industrial, and Navy shipyard sectors. With a legacy dating back to the 1960s, Tri-Seal originated from the Contromatics Quarter-Flex valve line and has maintained a reputation for precision, durability, and innovation in demanding flow control environments.
Engineered for Critical Service Applications
Designed to deliver bubble-tight, bidirectional shutoff at full-rated pressure, Tri-Seal’s butterfly valves are trusted by OEMs, engineers, and contractors for their performance in high-pressure, high-temperature, and corrosive environments.
Comprehensive Valve Portfolio
Tri-Seal offers a full range of butterfly valve solutions, including:
- Resilient Seated Butterfly Valves
Ideal for general service applications such as water treatment, data centers, pulp and paper, automotive, mining, ethanol, oil, and gas. - Soft-Seat High-Performance Butterfly Valves
Designed for heavy-duty and critical service applications requiring tight shutoff and long-term reliability. - Fire-Safe and Metal-Seat High-Performance Butterfly Valves
Engineered for extreme conditions, offering enhanced safety and durability in mission-critical systems.
All Tri-Seal valves are available with manual, electric, pneumatic, or hydraulic actuation and can be customized to meet specific project requirements.
Proudly Made in the USA
The domestic high-performance butterfly valves are cast, machined, and tested in the United States, ensuring full compliance with AIS and BABA standards. We take pride in being one of the few remaining American manufacturers of high-performance butterfly valves in an industry dominated by foreign imports. Since being acquired by McWane Plant & Industrial in 2021, Tri-Seal has continued to invest in U.S.-based manufacturing, quality assurance, and customer support to deliver unmatched value and responsiveness.
Why Choose Tri-Seal?
- Over 60 years of valve engineering expertise
- Full line of high-performance butterfly valves
- Made in the USA with AIS/BABA compliance
- Proven performance in power, marine, and industrial sectors
- Backed by McWane’s nationwide support and distribution network
Resilient Seated Butterfly Valve
Designed to handle a wide variety of applications such as water treatment, pulp and paper, power, automotive, mining, ethanol, oil, gas and other general service applications where a resilient seated butterfly valve is required.
High Performance Butterfly Valves
Soft-seat high performance butterfly valves for heavy duty and critical service applications, offering bubble-tight, bidirectional shutoff to full rated pressure.
High Performance Butterfly Valves (AIS/BABA)
Soft-seat, fire-safe and metal-seat high performance butterfly valves for heavy duty and critical service applications, offering bubble-tight, bidirectional shutoff to full rated pressure.