Maplef Green.3 Pressure Independent Control Valve (PICV) combines automatic balancing, flow limitation and two-way modulating control for HVAC systems. It maintains controlled flow despite differential pressure changes within its operating range, supporting heating and cooling performance in fan coil units, air handling units and cooling ceilings. Supplied by Alyamitech in Saudi Arabia.
Key Features
- Pressure independent operation helps prevent coil overflow.
- Adjustable maximum flow with 41 preset settings.
- Flow adjustment preserves the full valve stroke.
- Compatible Maplef actuators support modulating, floating or on/off control.
- Optional pressure/temperature test plugs for commissioning.
Technical Specifications
| Specification | Details |
|---|---|
| Series | Maplef Green.3 |
| Sizes and connections | DN40 and DN50 (1½″ and 2″); ISO female-threaded connections; NPT option |
| Pressure rating | PN25; maximum static pressure 2,500 kPa |
| Adjustable maximum flow | 0.528–3.79 L/s |
| Operating differential pressure | 16–600 kPa |
| Valve media temperature | −20°C to +120°C, subject to no external condensation |
| Actuator supply and control | 24V AC/DC; 0(2)–10V, three-point floating or on/off, depending on actuator |
The selected actuator has separate temperature limits; confirm these when specifying the complete assembly.
Materials of Construction
| Component | Material |
|---|---|
| Housing and covers | Forged brass CuZn40Pb2 or ductile iron ASTM A395 Grade 60-40-18 |
| Internal components | Stainless steel and glass-reinforced PSU/PPS/POM |
| O-rings and seats | EPDM |
| Diaphragm | HNBR |
