Explore performance details, construction highlights, applications, and technical information in one clear overview.
The ALPHAIR RE331 is part of the RE Series range of pneumatic rack-and-pinion actuators. It is designed for rotary valve actuation and features external adjustment system acting on the cam movement for open/close regulation of the valve. The actuator provides 90° movement.
External adjustment system acting on the cam movement for open/close regulation of the valve. It can be coupled with ISO 5211 compliant valves and also with valves that do not follow the standard. The lower mounting arrangement supports valve fastening and centering according to ISO 5211 / DIN 3337.
Dry or lubricated filtered compressed air; feeding pressure 8 bar / 120 PSI, maximum 10 bar / 145 PSI. Rotation adjustment is +/- 5°. Factory-applied lubrication for a minimum of 1,000,000 operations.
The body is made from extruded aluminium alloy en aw 6063 t6. The covers use aluminium alloy en ab 46100 t6, while the pistons use aluminium alloy en ab 46100 t6. The shaft is carbon steel with chemical nickel-plating 20 micron. Seal options include nitrile rubber nbr; high-temperature fpm/fkm and low-temperature silicone available as special executions.
Low-friction LAT-LUB acetalic resin bearings with +20% PTFE; replaceable for maintenance. Solenoid connections follow NAMUR VDI/VDE-3845, with top mounting provisions for accessories. The standard temperature range is -20°C to +80°C. 100% seal testing and running testing with electronic equipment; each actuator is individually tested.
RE331 has a double-acting torque at 6 bar of 6835 Nm and an A-90° dimension of 850 mm.
| Feature | Specification |
|---|---|
| Brand | ALPHAIR |
| Series | RE Series |
| Model | RE331 |
| Actuation | Pneumatic rack-and-pinion actuator |
| A-90° Dimension | 850 mm |
| Double-acting torque at 6 bar | 6835 Nm |
| Adjustment | External adjustment system acting on the cam movement for open/close regulation of the valve |
| Movement | 90° movement |
| Air Supply | Dry or lubricated filtered compressed air; feeding pressure 8 bar / 120 PSI, maximum 10 bar / 145 PSI |
| Rotation Adjustment | +/- 5° adjustment range |
| Valve Mounting | Double lower drilling for valve fastening and centering according to ISO 5211 / DIN 3337 |
| Solenoid Connection | Solenoid connections according to NAMUR VDI/VDE-3845 |
| Temperature | Standard execution from -20°C to +80°C |
| Bearings | Low-friction LAT-LUB acetalic resin bearings with +20% PTFE; replaceable for maintenance |
| Lubrication | Factory-applied lubrication for a minimum of 1,000,000 operations |
| Testing | 100% seal testing and running testing with electronic equipment; each actuator is individually tested |
| Body | Extruded aluminium alloy EN AW 6063 T6 |
| Covers | Aluminium alloy EN AB 46100 T6 |
| Pistons | Aluminium alloy EN AB 46100 T6 |
| Shaft | Carbon steel with chemical nickel-plating 20 micron |
| Seals | Nitrile rubber NBR; high-temperature FPM/FKM and low-temperature silicone available as special executions |
| Feature | Specification |
|---|---|
| Brand | ALPHAIR |
| Series | RE Series |
| Model | RE331 |
| Actuation | Pneumatic rack-and-pinion actuator |
| A-90° Dimension | 850 mm |
| Double-acting torque at 6 bar | 6835 Nm |
| Adjustment | External adjustment system acting on the cam movement for open/close regulation of the valve |
| Movement | 90° movement |
| Air Supply | Dry or lubricated filtered compressed air; feeding pressure 8 bar / 120 PSI, maximum 10 bar / 145 PSI |
| Rotation Adjustment | +/- 5° adjustment range |
| Valve Mounting | Double lower drilling for valve fastening and centering according to ISO 5211 / DIN 3337 |
| Solenoid Connection | Solenoid connections according to NAMUR VDI/VDE-3845 |
| Temperature | Standard execution from -20°C to +80°C |
| Bearings | Low-friction LAT-LUB acetalic resin bearings with +20% PTFE; replaceable for maintenance |
| Lubrication | Factory-applied lubrication for a minimum of 1,000,000 operations |
| Testing | 100% seal testing and running testing with electronic equipment; each actuator is individually tested |
| Body | Extruded aluminium alloy EN AW 6063 T6 |
| Covers | Aluminium alloy EN AB 46100 T6 |
| Pistons | Aluminium alloy EN AB 46100 T6 |
| Shaft | Carbon steel with chemical nickel-plating 20 micron |
| Seals | Nitrile rubber NBR; high-temperature FPM/FKM and low-temperature silicone available as special executions |
Browse product families and jump into the exact catalog section you need.