20X8 ND-HD | 20X8 ND-HD HAND DAMPER | EWC Controls O-Ring_GripLoc™ Compression Coupling 3 INCH 50 IN

3 INCH 50 IN

2-1/2 PVC FEMALE ADAPTER SOCXFPT SCH40 GRAY

WELL TEMP SEN 6" 1K PT

8 PVC CROSS GASKET CL100

1 PVC UNION FPTXFPT FKM

20X8 ND-HD | 20X8 ND-HD HAND DAMPER | EWC Controls O-Ring_GripLoc™ Compression Coupling 3 INCH 50 INACTUATORS ARE INSTALLED ON THE 2ND DIMENSION, PHOTO IS GENERIC AND MAY NOT REPRESENT THE PART BEING ORDERED 20X8 ND HD HAND DAMPER The ND HD Series of rectangular Hand Dampers are designed for field adjustment of Differential Pressure and Volume Control on Rectangular or Square Bypass Air Duct Runs. Pursuant to ACCA Manual Zr, A balancing hand damper should be installed in the bypass duct for setting adequate resistance to bypass flow. The ND HD