The primary goal of HVAC technology is to determine the most effective approach to heat/cool the interior of commercial sized buildings. One of the most effective ways of achieving this goal is through the use of chilled beam systems. Continue reading “Chilled Beam Systems”
Vane or paddle flow switches are used to initiate high or low flow alarms. A common application is as a low flow alarm for shut-down of a system for protection of the components from damage. Often these are used in cooling lines, oil lines, or monitoring other fluid flows that are critical for the system to operate. Continue reading “Custom Vanes for the V4 Vane Operated Flow Switch”
Dwyer Instruments, Inc. offers a wide variety of temperature sensors that use RTDs as the sensing element.
RTDs are based on the principal that the electrical resistance of the wire is a function of the temperature, with the resistance increasing as temperature increases. The resistance varies nearly linearly with temperature per the Callendar Van-Dusen equation. The wire used in RTDs as the sensing element is usually constructed of platinum, copper, or nickel. Platinum is the best material for this element, as it has the widest useful temperature range of these materials. It also has a very repeatable and linear temperature to resistance correlation. Continue reading “RTD Temperature Sensors”
Threaded connections are often referred to as a process connection type. For Dwyer product specifications, this connection type is typically NPT (National Pipe Thread), which is an American standard thread. These connections allow products to be installed directly into piping or with the use of threaded fittings.
For threaded connections there are two common types, (1.) straight or parallel thread and (2.) tapered thread. Continue reading “U.S. and International Threaded Connection Standards”
According to the Environmental Protection Agency (EPA), more than 280 million people get their drinking water from a community water system. Drinking water supplies in the United States are among the safest in the world, but even these water sources can become contaminated. Before fresh water can be considered potable, it must be treated to be made safe for drinking. Systems are set in place to ensure ongoing water quality, which then allows this treated water to be sent through water pipes and into our homes. Continue reading “How is Water Treated for Homes?”