| Type of actuation | Electric | ||
| Manual override | Detenting Non-detenting | ||
| Type of reset | Mechanical spring | ||
| Pilot air supply | Internal | ||
| Symbol | 991.501 | ||
| Switching position indicator | With accessories | ||
| b value | 0,45 | ||
| Standard nominal flow rate | 2.000 l/min | ||
| Characteristic coil data | 24 V DC: 1.8 W | ||
| Operating medium | Compressed air to ISO 8573-1:2010 [7:4:4] Inert gases | ||
| Corrosion resistance class CRC | 2 - Moderate corrosion stress | ||
| Media temperature | -10 °C ... 50 °C | ||
| Ambient temperature | -10 °C ... 50 °C | ||
| Electrical connection | Type C Plugs To DIN EN 175301-803 Square design | ||
| Type of mounting | In-line installation With accessories Either: | ||
| Pneumatic connection, port 2 | G1/4 | ||
| Material seals | NBR |
| Mounting position | optional | ||
| Design | Piston seat | ||
| Type of piloting | Pilot actuated | ||
| Flow direction | Non-reversible | ||
| Valve function | 2/2 | ||
| Operating pressure | 4 bar ... 10 bar | ||
| C value | 9,6 l/sbar | ||
| Duty cycle | 100% | ||
| Approval | c UL us - Recognized (OL) | ||
| Note on operating and pilot medium | Lubricated operation possible (in which case lubricated operation will always be required) | ||
| Suitable for use with food | See supplementary material information | ||
| Degree of protection | IP65 | ||
| Product weight | 263 g | ||
| Signal status display | With accessories | ||
| Pneumatic connection, port 1 | G1/4 | ||
| Note on materials | RoHS-compliant | ||
| Material housing | Die-cast aluminium |
