Technical data

Propylene glycol/water solutions are designed to be installed on systems

supplied by potable water supplies. Local authorities should be consulted

prior to draining system to storm sewers or to natural drainage areas. In

the main drain line between the valve and Easy Riser

Check Valves

inlet, a tee is provided on the check valve trim with a 1” NPT connection

for supply and maintenance of the antifreeze solution to the system above

the primary Easy Riser

Check Valve.

5.1.3 Reclaim Tank

An atmospheric storage tank is to be installed for

the system(s) that is of adequate capacity of the

largest system volume installed. The tank shall be

utilized as a reclaim tank for the propylene glycol

solution in the system piping when the system(s)

are drained for system service and for discharge

of propylene glycol solution if system pressure

exceeds 175 PSI (1 207 kPa) at the sprinklers.

The ball valve must be shut before the switch on

the CS-1 Panel is placed in Automatic Mode.

5.1.4 Automatic Pressure Control System

A means of relieving system pressure due to pressure buildup can be

provided through a specialized pressure switch and solenoid valve on the

downstream side of the primary check valve. See data page 47 a-b.

Storage areas that are expected to fluctuate more than 10 degrees from

nominal temperature will experience increased pressure in the system

Exam