| Valve function | One-way flow control function | ||
| Pneumatic connection, port 2 | PK-4 | ||
| Adjustment component | Rotary knob with scale | ||
| Standard nominal flow rate in flow control direction | 75,8 l/min | ||
| Operating pressure | 0 bar ... 8 bar | ||
| Material housing | PA-reinforced | ||
| Symbol | 991.453 | ||
| Standard nominal flow rate in throttle direction for 0.1->0 MPa (1->0 bar, 14.5->0 psi) | 38 l/min | ||
| Standard flow rate in flow control direction 0.6->0 MPa (6->0 bar, 87->0 psi) | 129 l/min | ||
| Operating medium | Compressed air to ISO 8573-1:2010 [5:4:3] Inert gases | ||
| Media temperature | -10 °C ... 50 °C | ||
| Note on materials | Contains paint-wetting impairment substances RoHS-compliant | ||
| Material retaining bracket | Wrought aluminium alloy | ||
| Material screws | Steel |
| Pneumatic connection, port 1 | PK-4 | ||
| Type of actuation | Manual | ||
| Type of mounting | Front panel mounting | ||
| Standard nominal flow rate in blocked direction | 245 l/min | ||
| Ambient temperature | -10 °C ... 50 °C | ||
| Mounting position | optional | ||
| Operating pressure from 2 to 1 | 0 bar ... 8 bar | ||
| Standard nominal flow rate in return direction for 0.1->0 MPa (1->0 bar, 14.5->0 psi) | 25 l/min ... 90 l/min | ||
| Standard flow rate in non-return direction 0.6->0 MPa (6->0 bar, 87->0 psi) | 245 l/min | ||
| Note on operating and pilot medium | Lubricated operation not possible | ||
| Product weight | 48 g | ||
| Material seals | NBR PVC | ||
| Material PK connections | Wrought aluminium alloy Brass |
