Today is the last day of AHR Expo, and the show is beginning to settle down as we all head back to our normal day-to-day. We hope that all of our teammates, partners, customers, and acquaintances have safe travels wherever you are headed to. Continue reading “Thanks for Visiting Us at AHR Expo!”
The Dwyer team recently released the Series MSX Pro Magnesense® Differential Pressure Transmitter, which meets stringent industry standards with innovative global product design. This series is ideal for monitoring building control applications, and also utilizes enhanced accuracy and stability for use in high performance, critical environments. Continue reading “Product Highlight: Series MSX Pro Magnesense® Differential Pressure Transmitter”
High duct-static pressure creates problems during a building fire when fire dampers close. Closed fire dampers cause downstream duct sensors to detect a drop in pressure. The duct pressure sensors in turn send signals to crank the air handler even faster to get back up to normal operation. Because the fire dampers are closed, when the air handler ramps up, the duct pressure upstream of the fire dampers will increase to a point where a high static pressure switch will cut power to the VFD (variable frequency drive) and send a signal to the DDC (direct digital control). Switches in this application — by specification — are all manual reset and require two outputs: one for cutting power to the VFD and one for sending the signal to the DDC.
Traditionally, there have been three tactics to address this issue, each with its own problems. Continue reading “Solve High Duct-Static Cutout Problems with the Series 1831”
What is a Paint Booth?
Aerospace paint spray booths provide the ideal environment to paint aircrafts, such as fighter jets, commercial airplanes, and helicopters. The paint spray booths regulate humidity, temperature, airflow, and pressure for proper coating application and curing. The booths are categorized by three different designs, which are: air pressure, cabin, or airflow.
The air pressure design booth will either have a negative or positive pressure. The positive pressure means that the pressure inside the booth is greater than the air pressure outside of the cabin. The air pressure inside the booth is provided by an air make-up system and replaces the air being exhausted by the fan. Continue reading “Aerospace Application: Paint Spray Booth”
In HVAC systems, there are many different parameters that are commonly measured for system performance or building comfort. Some of the most commonly measured HVAC system parameters are temperature, air velocity, humidity and static pressure. Of those parameters, static pressure is extremely important in terms of system performance. Static pressure indicates how hard the HVAC system has to work to move air through the building or how much resistance to flow exists. The higher the static pressure, the harder the system has to work to move air through the building. Continue reading “Static Pressure in HVAC Systems”