CHICAGO — Four-way reversing valves are at the heart of heat pump systems, and are indeed necessary to their function. An American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc.

If you are a BMW enthusiast, then for the better part of the last decade you became familiar with the Parking Assistant array of features meant to make parking a car as easy as driving it in a ...

The Standard's journalism is supported by our readers. When you purchase through links on our site, we may earn an affiliate commission. Cameras are, by now, a standard feature in the modern vehicle.

Phoenix Contact's CONTACTRON family of solid-state contactors now includes reversing and non-reversing contactors in a variety of amperages. Jan. 7, 2011 The contactors can activate or reverse 1- to ...