Valve Repair

AVS holds ‘VR’ certification from the National Board of Boiler Inspectors (NBBI), allowing us to repair and refurbish all manufacturers and models of safety relief valves. Upon completion, we provide a detailed report, listing the parts that were machined or replaced, as well as the certification test results. In addition to safety relief valves, our experienced technicians can repair all types of isolation valves, including gate, globe, ball, butterfly, and check valves
Type: All Valves

Upgrades & Modifications

Our ability to diagnose operational issues with your valves allows us to make upgrade and modification recommendations that will improve performance. Typical modifications include:

  • Metallurgy upgrades to address changes in your process composition.
  • Bellows installation in safety relief valves to negate back pressure build up in outlet piping.
  • Stem extensions to improve operation ergonomics of isolation valves.
  • Gearbox sizing to improve opening or closing time of isolation valves.

Type: All Valves


Our facility has steam, air, and water test stands that have been qualified by the National Board of Boiler Inspectors (NBBI) for safety relief valve testing. We test safety relief valves set points per the National Board Inspection Code VR program. Safety relief valve seat tightness is tested per API-527. Once a valve leaves our facility, you are ensured that it will perform as new.
Type: Pressure Relief Valves

O2 Clean Room

Our O2 clean room makes AVS unique among regional valve repair centers. Many industrial gas customers use AVS to clean new and repaired valves and regulators that require degreasing due to contact with oxygen, fluorine, or other processes. Our cleaning facility is segregated from our main shop and employs air filtration systems to ensure that no unwanted particulate will come in contact with your valve. We use a dedicated oil free air compressor to supply our stainless steel test stand.  Black lights are employed to ensure hydrocarbons have been removed and the cleaning is complete. AVS has the ability to clean all types of valves and instrumentation to your demanding standards.
Type: All Valves