As mentioned in Part 1, the HVACR industry is in the process of researching new low-GWP refrigerants and refrigerant blends that can be incorporated into refrigeration and air conditioning systems.

Palmer Wahl has added differential pressure chart recorders to its existing line of mechanical circular chart recorders. The recorders feature an edge welded rupture-proof pressure cell for up to 30% ...

Question: What are constant pressure charts? Answer: Constant pressure charts like the 500 mb chart shown below may seem obvious to interpret. It has many features similar to what you might see on the ...