Pneumatic actuator, single acting and other mounting elements for valves DN125
Basic information
| Control shaft diameter | 20 mm |
| Drive height with carrier | 203 mm |
| Drive diameter | 109 mm |
| Torque | 20 Nm |
| Control pressure | 4-8 bar (recommended 5-7 bar) |
| Working temperature | –10 °C to 100 °C |
| Adjustment speed | 1.5 sec/90° |
| Material | AISI 304 |
PRINCIPLE OF FUNCTIONING OF SINGLE ACTIVE DRIVE:
The vertical air-spring pneumatic drive (single-acting) is widely used in operations requiring repeated starting in a short time interval, the advantage is its fast and accurate response. The valve is opened with compressed air.
Pneumatic single-acting actuator (air / spring) is used for opening and closing of direct butterfly valves with compressed air (recommended value for safe opening of the valve is 5 – 8Bar). The spring of the pneumatic actuator is used to close the butterfly valve (without control air pressure), or in case of a drop in the control air pressure for safe closing of the valve.
To control the pneumatic actuator, the actuator must be supplemented with a pilot (electromagnetic) valve for controlling the compressed air supply. It is also possible to supplement the butterfly valve with inductive sensors for signaling the actual position of the valve (open / closed). This configuration allows you to control the valve via a control system with feedback on what position the valve is in.
The position of the valve is also indicated (visually) by a mechanical indicator, which is mounted on the control shaft.
