| Size | Midi | ||
| Actuator lock | Rotary knob with integrated lock | ||
| Design | Directly actuated diaphragm regulator | ||
| Symbol | 991.538 | ||
| Operating pressure | 0 bar ... 16 bar | ||
| Max. pressure hysteresis | 0,2 bar | ||
| 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 ... 60 °C | ||
| Product weight | 1.250 g | ||
| Pneumatic connection, port 1 | G3/4 | ||
| Note on materials | RoHS-compliant | ||
| Material seals | NBR |
| Series | D | ||
| Mounting position | optional | ||
| Controller function | Output pressure constant Via primary pressure compensation With secondary venting | ||
| Pressure gauge (ANALOG) or Pressure display (DIGITAL) | With pressure gauge | ||
| Pressure regulation range | 0,5 bar ... 12 bar | ||
| Standard nominal flow rate | 3.500 l/min | ||
| Note on operating and pilot medium | Lubricated operation possible (in which case lubricated operation will always be required) | ||
| Air purity class at output | Compressed air to ISO 8573-1:2010 [7:4:4] Inert gases | ||
| Ambient temperature | -10 °C ... 60 °C | ||
| Type of mounting | Front panel mounting In-line installation With accessories | ||
| Pneumatic connection, port 2 | G3/4 | ||
| Material sub-base | Die-cast zinc | ||
| Material housing | Die-cast zinc |
