3M™ Reusable Respirator Inhalation Valve Assemblies are replacement parts designed for use with 3M™ Reusable Respirators. 3M™ Inhalation Valve Assemblies are quick and easy to fit and can help extend the effective service life of your 3M™ Reusable Respirator.Keep your 3M™ Resusable Respirator well maintained and ready for use with 3M™ Resusable Respirator Inhalation Valve Assemblies. They are easy to fit and help increase the effective service life of your 3M™ Reusable Respirator. Our inhalation valves replace damaged or worn inhalation valves, and it’s specially designed for use with 3M™ Reusable Respirators.