The Valtek NR diaphragm actuator is a compact actuator with high torque and pneumatic stiffness for excellent throttling capabilities. The splined shaft connection eliminates backlash for precise control. Designed for supply air pressures to 80 psi (6 Bar). The high stiffness and rolling diaphragm provides firm control from 0 to 90 degrees.
Additional information
| Type | Spring Diaphragm |
|---|---|
| Action | Rotary |
| Sizes | 125, 250, 500, 700, 1500, 3000 |
| Fluid Power | Pneumatic |
| Pressure Rating | 29-80 psig |
| Fail Safe Operation | Last, Closed, Open |
| Enclosure | Painted Anodized Aluminum |
| Temperature Range | Standard: -40°C to 80°C (-40°F to 176°F), Extended: -60°C to 80°C (-76°F to 176°F) |
| Manual Override | Side-Mounted, Top-Mounted and Central-Mounted Handwheel |
| Options | Internal Air Supply to Yoke, Double Stacked |
Features & Benefits
- Diaphragm actuator provides excellent sensitivity to provide quick, accurate movements for precise process control
- Rolling diaphragm creates minimal wear resulting in long operating life and the simple design allows easy maintenance
- Radial spring arrangement permits a low mounting height
- Low volume between diaphragm and case gives fast response times
- Strong operating force by permissible pressure supply up to 6 bar / 87 psig
- Permissible ambient temperature -40 up to 80°C, operating in the limits temporarily allowed otherwise lifetime will be reduced
- Fabric-reinforced, roll-type diaphragm with minimum area variation allowing linearity to be maintained throughout various stroke positions, even upon loss of operating forces
