On any type of refrigeration system, from small reach-in coolers all the way to large chillers, controlling the head pressure of the refrigerant is important.That’s because it helps keep the system ...

Three different hydraulic-over-air relay valve designs are available: single, dual, and tandem.The valves accommodate 150-psi maximum air pressure and 2,000-psi maximum hydraulic pressure.

The end result is increased discharge air temperatures. Figure 3. Liquid temperature correction factors for R-404A. Oil Logging ... Next month: Methods of maintaining the head pressure control at a ...

The line provides a high level of regulation accuracy and repeatability. Rather than range springs, the regulators and relays use a stainless-steel capsule as a sensing device. Its multistage ...