The Spirax Sarco SP7 is a digital electro-pneumatic positioner for pneumatic actuators. It provides accurate valve positioning using a 4–20 mA input with HART communication. The positioner is compact, easy to set up, and suitable for steam and general process control applications where simple digital control is needed.
| Parameter | Specification |
|---|---|
| Input Signal | 4–20 mA DC + HART |
| Supply Air Pressure | 1.4–7 bar |
| Air Consumption | Low |
| Stroke | Linear up to 150 mm, rotary up to 90° |
| Accuracy | ±0.5% of span |
| Ambient Temperature | –20 °C to +80 °C |
| Enclosure | IP66 |
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