The pioneer and partner for valve testing machines

The pioneer and partner for valve testing machines


DVT develops valve testing solutions that meet your operational needs and deliver success over the lifetime of your machine. We are the engineer’s choice.


DVT has the most complete portfolio of valve testing systems, it's all we do. Every project is designed, built, and maintained according to your specifications.


We are proud of our people and the reputation we have built. Returning customers and their recommendations are the reason for our success.

Dunn’s Valve Testers, Inc.

Dunn’s Valve Testers (DVT) has been the leader in manufacturing and maintaining valve testers since 1978. DVT was the first to introduce these machines and we continue to innovate as a partner with our customers. Each machine is built to provide maximum uptime with the shortest cycle time for your operations.

DVT's commitment to your success is our priority. We work with your technical team to develop clear specifications, provide regular updates, and welcome your engagement during the project and beyond.


Every product is built with the operator's safety in mind. DVT's rigorous  HSE standards ensures that each test bench is designed to exceed operational limits. Each machine is tested to capacity and inspected to safeguard your personnel. We have a broad array of standard features, automation options, and protective barriers to suite any setting.

Our promise is to be right there with you providing technical solutions, maintenance, and refurbishment when needed. We are proud of the legacy that Emmitt Dunn started 40 years ago producing the first valve testing machines for the US Navy. Everyday we build on that tradition by investing in relentless improvements to be your trusted source for the best machines available.

DVT Project Execution


DVT understands that each customer has unique valve features, facility considerations, and operator skill sets that need to be addressed. We start in the proposal phase with a modular solution that is developed and approved through detail design. 


DVT test stands are fabricated, assembled and tested at our plant in Houston. We maintain the highest standards of materials, labor, and manufacturing that goes into each system. Every machine is tested and inspected to project specifications before delivery. 

Installation & Commission

Customers are invited to be part of the factory testing so their operators have full access to learn the equipment along with supporting videos and reports.  We regularly provide onsite installation and commissioning support when required. 


We provide onsite, hands-on training with our product experts and use virtual settings for remote learning when preferred.

Lifetime Support

We offer maintenance, certification, spare parts, refurbishment and product upgrades through the life of your machine. 


Model FT006, Serial #176


B&H Inc, Houston, Texas:

“B&H Valve purchased 2 Dunn’s Valve Testers #076 in 1983 and #176  in 1987 (pictured opposite). We have used the tester every day since the day of purchase. Apart from the replacement of wear items the tester has never let us down and we intend to use it daily for the next 25 years.

We will always purchase our replacement parts from Dunn’s Valve Testers to ensure we get the right part first time.”

—Bill Summers Owner and President of B&H Valve Inc

DVT Global Installed Base

DVT_Infrastructure Map_lines

Current DVT Agents

  • United Kingdom
  • Germany
  • UAE
  • Malaysia
  • Singapore
  • Australia
  • India
  • Canada
  • Pakistan