A weighted relief valve (WRV) protects your blower package by allowing excess air pressure to release at a predetermined set point. This design is very efficient and consistent, and it will provide years of maintenance-free operation. The weighted relief valve is easily installed in the vertical position on the discharge side of the silencer. The valve body is available in 2”, 3”, or 4” NPT connection sizes. The set point can be adjusted using removable weights, which come in 0.5 PSI or 1.0 PSI increments.