P72C
3/2 control valve
info@nortrade.si | +386 4 531 75 50
info@nortrade.si | +386 4 531 75 50
FRL control valves perform three core functions in a pneumatic system: (1) soft start / exhaust valves (P-series with F-suffix) controllably build downstream pressure on start-up and dump it on shutdown, reducing equipment damage and operator hazards; (2) 3/2 directional control valves (P-series with C-suffix) switch the system on or off via pilot or solenoid; and (3) lockout / shut-off valves (T-series) lock the system in the closed position with a padlock for maintenance (LOTO — lockout-tagout). Three Norgren families are available: Excelon (8 ranges), Excelon Plus (7 ranges) and Olympian Plus (6 ranges).
3/2 control valve
Soft start / dump valve
3/2 control valve
Soft start / dump valve
Soft start monitored dump valve
Lockout valve
Lockout valve
Lockout valve
3/2 control valve
Soft start / dump valve
3/2 control valve
Soft start / dump valve
3/2 shut-off valve
3/2 shut-off valve
3/2 shut-off valve (extreme temperature)
Soft start / dump valve
Soft start monitored dump valve
Soft start / dump valve
3/2 lockout valve
Shut-off & lockout valve
Shut-off & lockout valve
PC (control) is a 3/2 directional control valve that switches the system on or off via pilot or solenoid. PF (smooth start / exhaust) ramps downstream pressure gradually on start-up and dumps it on shutdown. PS (soft start monitored dump) is the same as PF but with an integrated micro-switch — for PLC feedback in automated systems. In typical industrial systems PF or PS is the standard choice (soft start is a safety requirement).
Soft start gradually builds downstream pressure from 0 to operating level on start-up (build-up time depends on downstream volume; adjustable). This prevents pneumatic cylinders from snapping with full force — which can damage equipment and injure operators. Supports compliance with the EU Machinery Directive (2006/42/EC) by preventing uncontrolled start-up. The monitored variant (PS) adds status feedback for PLC-level safety control.
LOTO (Lockout-Tagout) is one of the most important maintenance safety procedures (OSHA 29 CFR 1910.147 in the US, equivalent regulations in the EU). Before maintenance, the technician padlocks the energy source so it cannot be re-engaged by anyone else. Most Norgren lockout valves (T72/T73/T74, T82/T84/HT84) lock in the closed position only — choose these for LOTO; the Olympian Plus T68 can lock open or closed — they physically prevent the system from being restarted. Recommended in any industrial pneumatic system where maintenance technicians work.
Norgren FRL control valves (PC) are 3/2 (3-port / 2-position) — 1 inlet, 1 outlet, 1 exhaust, two states (open / closed). This is the system-level on/off valve that goes after the FRL. 5/2 valves (5-port / 2-position) are actuator-level valves — they drive a cylinder in two directions. Those belong to a separate product group (Valves).
Typical placement: after the FRL, before downstream components. Order: (1) FRL (filter + regulator + lubricator), (2) lockout valve (T-series) for maintenance lockability, (3) soft start / 3/2 control valve (P-series) for controlled start-up and on/off, (4) downstream system (valves, cylinders). Excelon and Excelon Plus modular connections allow these to stack together.
