FRL Portable Air Cradle. The RS Filter-Regulator-Lubricator (FRL) Portable Air Cradle is a free-standing unit that may be used in a variety of environments and industries (often for use with air tools) where a portable compressed air regulator is required.Applications include workshops and garages/automotive equipment. The unit may be operated within a temperature range from -10°C to +50°C and can be used outdoors. The rugged RS Portable Air Cradle offers a pressure range of 0 to 8 bar (0 to 800 kPa), with a maximum inlet pressure of 15 bar, and maximum flow rate of 2500 litres per minute. Connection: G 1/2. RS Control Valve Accessories are also available for use with the RS Portable Air Cradle, and include:. Intrinsically Safe (ATEX approved) Solenoid-Spring Valves (e.g. ; 784-0057 784-0057 and ; 784-0048 784-0048 ) NAMUR Solenoid-Spring Valves (e.g. ; 784-0044 784-0044 ) Power Take Off (PTO) Control Valves (e.g. ; 784-0072 784-0072 and ; 784-0076 784-0076 ) Spool Valves (e.g: ; 784-0060 784-0060 and ; 784-0079 784-0079 ) Spool Valve Bodies (e.g. ; 784-0050 784-0050 and ; 784-0088 784-0088 )