MK/MV – Medium Profile Series Unit Coolers (E206993_M)
9
B.
A sufficient number of pressure relief and pressure regulating relief valves may need to be
provided based on the system capacity and located such that no stop valve is provided between
the relief valves and the parts or section of the system being protected.
To properly protect and control systems using pumped liquid overfeed R744, the solenoid, isolation, and
pressure relief valves shall be arranged as shown in either Figure 2 or 3, according to the solenoid valve
arrangement. To handle the requirements of liquid R744 high pressure solenoid valves are to be used.
Figure 2 MULTIPLE UNIT COOLERS CONTROLLED BY A SINGLE SOLENOID
Figure 3 MULTIPLE UNIT COOLERS CONTROLLED BY MULTIPLE SOLENOIDS