Choosing dampers can be a mind boggling experience, but once you have an understanding of the basics and a few well asked questions, your needs can be quickly and expertly filled using Honeywell Commercial Dampers.
The first Honeywell Commercial Damper we will look at is the D series of rectangular dampers. The D series is broken down into 3 types the D1, the D2, and, you guessed it, the D3 series. Here are the basics.
D1… ultra low leakage design based at 6cfm @ 4”wc with a velocity rating of 2500-4000 fpm. The blade seals are silicone and the jamb seals are 304 stainless steel.
D2…low leakage design based at 10cfm @ 4”wc with a velocity rating of 2000-3000fpm. The blade seals are extruded vinyl and the jamb seals are 304 stainless steel.
D3…low leakage design based at 120cfm @4”wc with a velocity rating of 2000-3000fpm. These dampers do not have blade seals or jamb seals.
All the rectangular dampers can be fully optioned and sized depending on the client’s needs.
D1…Ruskin CD60 and the Greenheck VCD33
D3…Ruskin CD35 and the Greenheck VCD20
Note: Actuators for the rectangular dampers can be sized by knowing the proper torque needs for the actuator. The formula is: damper size (length X width) X rated torque multiplier X safety factor = Actuator in-lb torque requirements.
Commercial Round Dampers from Honeywell are available from 6” to 16” with or without actuators.
The D690 series is without actuator, and the DM7600 series come mounted with a Honeywell actuator with a 90 second timing and a 2-10 Vdc or 4-20 mA ( Honeywell ML7161) or SPDT Floating (Honeywell ML6161) series actuator.
If you are a Stromquist customer located in Georgia or Florida and you need help sizing or ordering a commercial damper you can contact Stromquist and Company at www.stromquist.com or call us at 1-800-241-9471. All others can order this product from one of our affiliates at CGNA.