Dufrene and Company, LLC

Dufrene & Company, LLC was established in 2004 with a focus on representing specialty valve products for heavy industries such as pulp & paper, power, mining, water, wastewater, and chemical facilities. Fortunately, we formed a partnership with a small family-owned manufacturer of knife gate valves based in Hamilton, Ontario, Canada. After years of promoting and selling the North Port Valve brand, we successfully negotiated to become the exclusive agent for North Port Valves in all markets outside of Canada, where North Port Valves maintains its independent distribution network across all Canadian provinces.

Today, Dufrene & Company, LLC boasts a robust network of exclusive distributors dedicated to promoting and offering North Port Valves throughout the 48 contiguous states, Mexico, and Central and South America. We have curated a comprehensive line of technically superior knife gate valves that are readily accessible to our clients. Leveraging the size and flexibility of our manufacturing programs, we can provide deliveries that surpass the industry standard, setting us apart from our competitors. Our focus lies in collaborating with our distributors and clients to tackle challenges by identifying application-specific solutions, rather than simply offering a “replacement” valve.

North Port Valves (NPV)

Contrary to many of your competitors we are exclusive to manufacturing only knife gate valves and their accessories to include the pneumatic actuators. North Port Valves has been in business for over 20 years and is located in the Golden Horseshoe area in Ontario Canada. It is a family-owned business that focuses on quality and workmanship.

We take great pride that most of the materials in our products are supplied by Canadian Companies. A lot of them are local in the Golden Horseshoe area including all our castings. Every valve component is manufactured in our facility, as well as all assembly and testing.

We offer several different styles of knife gate valves that work in many different applications as well as being able to do custom work due to our in-house manufacturing. We also manufacture our own line of pneumatic cylinders specifically designed to fit our valves. We manufacture O Ports, Check, Sampling, and Transmitter valves as well. We are confident that we can produce a knife gate valve for any application.

Border City Castings

Border City Castings, a family-owned and run business, was established in 1994 with a large manufacturing area of 16000 sq ft. President and General Manager Bob Nadeau has been in the foundry industry for 35 years. Son, Drake Nadeau the supervisor and production manager along with Bob brings a wealth of expertise to the team.

Border City Castings, prides itself on being very diversified in the types of metals, sizes, and designs of the castings they produce. This diversity allows them to meet all requirements put forth by their customers.


  • Office Area is 1500sq ft.
  • Land Area is 7.85 Acres.
  • Casting size- 0.5 lbs. to 2000 lbs.
  • Production Capacity is 80 tons monthly.
  • Molding Process – No bake (Environmentally Friendly) CO2 process.
  • Coremaking Process – No bake (Environmentally Friendly) CO2 process.
  • Melting Process – Electric Induction Furnace.
  • Finishing Process – Wheelabrating finish, Sandblast finish, heat treat, and fully machined castings if required.