Control Trends by Stromquist

Gas metering is a big part of what we offer customers. One product that has proven to be very successful is the Honeywell Smart Multivariable (SMV) Transmitter.  It is an industry leader – there are no others on the market that work as well.  It measures the gas pressure & temperature and measures a differential pressure across a primary element.  The primary element can be an orifice plate or a Preso Ellipse pitot tube.  It creates a differential pressure that we measure and relate to flow (the square root of the pressure drop is proportional to the flow rate).  The SMV calculates a corrected flow by accounting for the compressibility of the gas along with the pressure and temperature that exist in the pipe.  It is quite an involved calculation that is pre-loaded into the transmitter and set up using a software wizard.  Please keep it in mind for gas metering applications – it is an affordable alternative.  For under $4000 you can measure big flows accurately with easy installation. Continue Reading

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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.

Competitive comparisons:

D1…Ruskin CD60 and the Greenheck VCD33

D2…Ruskin CD36/46

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.

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I am really liking the way Honeywell is positioning their HVAC damper line these days.  Not only are they offering a complete product offering of round, rectangular, and air foil dampers; their pricing and delivery make their dampers very attractive.  The Honeywell volume control dampers are built to AMCA-certified air performance standards which means they are one of the highest rated control dampers you can buy.

With free drop shipping  and 3-5 day delivery on Honeywell’s standard damper line it is worth taking a look at their damper offering.  Check out the volume control ( D1, D2, D3),  and round dampers.

If you are in Georgia or Florida call your Stromquist rep at 800.241.9471 to get a quote on your next damper job.  All others, please contact one of our affiliates at CGNA ( Controls Group North America)

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