Optimizing Your Performance with Superior Services

After more than eight decades as a  valve manufacturer for a variety of industries, Cooper knows the pressures our customers face, and the value of ready answers, prompt follow-through and  getting all of the services you require – minus all hassles. Whether you are down the street or around the globe, we strive to be your one-stop source for testing and maintaining your equipment to optimize your performance, uptime and return on your investment.

It starts with our in-house technicians, who can handle a variety of your needs, including a host of very exacting testing options.

In addition, we have a network of top-notch third-party suppliers who will meet your needs on time, and with the highest quality standards.

Cooper is also growing to meet our expanding markets with comprehensive service and repair centers near industrial centers in Texas and California.

When you need Quality Without Compromise, we  hope you will make Cooper your first call for all valve issues and services.


High tech? High standards? Ultra–precise testing parameters? No problem. Cooper’s deep experience in manufacturing and installing valves for extreme services has made us ready and able to meet the majority of your testing needs, with the help of trusted suppliers.

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The tests we perform:

A non-destructive testing method used to find hidden flaws in materials using short wavelength electromagnetic radiation to penetrate the materials.
Dye Penetrant Testing A non-destructive testing method and is used to locate surface-breaking defects such as hairline cracks, surface porosity, leaks, and fatigue cracks
Ferrite Content Testing A non-destructive testing method used for austenitic stainless steel and duplex materials to determine the corrosion susceptibility, mechanical properties, service suitability, and service reliability.
Hardness Testing
A destructive test which is used to determine the resistance of the material to deformation.  The valve bodies are struck with an indenter ball or other official measuring device to determine the resistance to deformation a valve material has.
Corrosion Testing
Leak Testing
Helium will not react to materials used in valve construction. This test is used to find leaks in al valve sizes. A mass spectrometer is tuned to the gas used in the testing to detect any possible leakages.
API 598 
Valve Inspection
& Testing
The API 598 valve inspection and testing procedures consist of various pressurized tests, including:
Shell Test, Backseat Test, Low-Pressure Closure Test, High-Pressure Closure Test, Visual Examination of Castings and a High-Pressure Pneumatic Shell Test.
Practice C
Intergranular Test
(Huey Test)
The Huey tests determines if steel has been heat-treated appropriately, and the rate of corrosion of the sample.
Material samples are boiled for five separate intervals of 48-hours each, in a 65% solution of nitric acid. The corrosion rate during each boiling interval is calculated from the decrease in the weight of the samples. The customer must specify the maximum permissible corrosion rate and, in applicable cases, data on sensibilizing heat treatment.


Proper maintenance and cleaning are matters of life and death in many industries. The specifications for cleaning valves used in the manufacturing of toxic gases are extremely high, and so are Cooper’s extremely high quality standards for work in this area.

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Cooper works with certified third party vendors to provide the highest caliber services for you involving:

  •  Chlorine Cleaning
  •  Oxygen Cleaning
  •  Phosgene Cleaning

Heat Treating

For valves used in particularly severe conditions, Cooper Valves heat treats certain critical parts of our products to strengthen alloys to handle higher stress. 

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Heat treatments are time-and-temperature controlled processes that relieve residual stresses and/or modify material properties such as strength, ductility, and toughness. Some common heat-treating operations are annealing, quenching, tempering, and case hardening.

Automation & Manual Operations

Cooper Valves can be configured with a large selection of automation technologies or manual operation systems.

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To ensure proper operation and to improve valve life and reliability,  we work with our customers to determine the appropriate size actuator or manual operation device to eliminate the possibility of over-torquing or under-torquing.

We offer help with a wide variety of automated systems including: electric, hydraulic, pneumatic, multi-turn, quarter-turn  and linear.

For manual operations, we service: worm gears, spur gears, bevel gears, reach rods, table stands. extension systems and brackets.

Some of our preferred third-party vendors include: Auma, Rotork, Flowserve, etc.

Repair & Field Services

Have a valve that’s been in service too long and want it to operate like new again?

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In the field or in the shop, we will refurbish it until it’s reaches “good as new” operations. Most importantly, we stand behind all of the work we perform.

Cooper has several comprehensive service centers to accommodate your needs. Our flagship center at our headquarters in Stafford, Texas offers a full array of in-house services and repair capabilities, and also provides comprehensive field services.

Most recently, Cooper added two regional service centers in California to service Accuseal® Metal Ball Valves. It’s another step in establishing a network of service and repair centers to service customers around the country.

  • RMA process information, Service Center Contact, Download for Service Brochure

Do you have an especially challenging project?

Our technology specialists invite you to contact us while you are in the design phase for expert assistance and ideas on how to optimize production and efficiencies.

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