Powers Process Controls 594 220 Packing Kit Els PW 17895 The pitch is adjusted by The pitch is adjusted by loosening the set screw on the movable flange The Reznor 68006 Venter Wheel is a precision engineered blower wheel designed specifically for draft inducer assemblies in Reznor gas fired unit heaters Visible moisture around the top of the valve bonnet or resistance during stem travel often indicates that the valve stem seal has degraded and requires a new packing maintenance kit The Powers Process Controls 594 220 Packing Kit is a specialized maintenance solution engineered for water service applications requiring a 1 4" stem interface