ACTUATORS 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 includes a Heavy Duty Manual Quadrant allowing Easy & Accurate Field Adjustment of the Pressure Drop through the Bypass duct run. In addition, the ND-HD has a factory installed Stop Bolt resulting in 70% maximum closure. This superior design ensures minimum bypass flow even if the hand damper is accidentally closed. Airflow can be from either direction and the Damper can be oriented in any position. The ND-HD is designed to provide reliable and quiet Balancing & Volume control functions at velocities up to 2500 feet per minute. ND-HD dampers are easy to install and adjust. The superior design insures long life with no maintenance and a 5 year warranty. See Application Note #090376A0169C for installation and setup instructions.
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Prompt shipping and expert packing
We are able offer many shipping options because of our long-term partnership with UPS FedEx DHL. Our warehouse staff is highly educated and will package the items according to our precise and exact specifications. Before shipping, all goods are thoroughly inspected and securely secured. We deliver to thousands of customers every day from all over the world. Our dedication to becoming the largest online retailer in the world is shown by this. We have distribution centers as well as warehouses in Europe as well as the USA.
Note: Orders containing more than one item will be assigned a separate processing period for each item.
Before shipping, we will check the item thoroughly before sending the items. The majority of orders are shipped within 48 hours. The expected delivery time is between 3 and 7 days.
Returns
The stock is constantly changing and not fully managed by us because of the involvement of several entities, including the factory as well as our warehouse. The actual stock can be changed at any time. Be aware that it is possible for your order to be out of stock after you have placed the order.
Our policy lasts 30 days. If you haven't received the product within the 30 days period, we are not able to provide the option of a refund or exchange.
The item must not be used, and it must be in its original condition. It should also remain in the original packaging.
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