Parker Hannifin, a pioneer in supermarket refrigeration control, introduces a new line of solenoid valves to control secondary coolants. These fluids include propylene glycol, ethylene glycol, Pecasol 50, Dynalene HC-40, and others. Parker's valve is the only valve designed to meet the requirements of both medium and low temperature applications encountered in supermarket applications. In a secondary coolant, or secondary loop system, a chilled solution, such as propylene glycol, is circulated throughout the system rather than liquid refrigerant. Secondary coolant systems are advantageous because they can eliminate liquid refrigerant and suction gas lines running through a store. This reduces installation costs and labor, and eliminates costly refrigerant leaks. Also, PVC tubing can be used, rather than the heavier, more expensive copper tubing normally used in traditional systems. Again, this reduces installation costs and labor, and eliminates costly refrigerant leaks. Another benefit is more efficient defrost cycles with less potential product damage. Coil not included; order separately.