Blower Relief Valve Vacuum Capabilities Pressure Preset Limit 194 in wc Outside Diameter 5 in Inlet Size 2 in Inlet Type NPT Compatible Manufacturer Part Number 2VFB30-1.2-5T 2VFB30-1.2-7W VFD6-H VFD6-L VFZ601A-5W VFZ601A-7W Compatible Grainger Part Number 22NX94 22NX95 38UW84 38UW85 53WC11 53WC12 Maximum Operating Pressure 15 psi Minimum Operating Pressure 1 psi Overall Length 6.31 in