The TEC spring loaded vacuum relief valve offers reliable capacity relief for positive displacement blowers. 

The pressure relief valve is installed in the inlet air stream to prevent damage to positive displacement blowers when operating vacuum levels exceed the maximum vacuum rating of the blower.

As the system vacuum level approaches the valve set point, the valve is forced from the valve seat for fast and efficient vacuum relief. When acceptable system vacuum levels are restored, the valve automatically returns to the original set position.

The valve body is constructed of cast iron and accurately machined to very tight tolerances for a tight seat and smooth operation.

The valve is fully adjustable to permit accurate vacuum settings. Adjustment in the relief valve setting can be made by changing the compression of the spring.