Flow control valves Series RFU and RFO
Unidirectional and bidirectional
Ports: M5, G1/8, G1/4, G3/8 and G1/2
Nominal diameters: 1,5 mm (M5), 2 and 3 mm (G1/8),
4 and 6 mm (G1/4), 7 mm (G3/8 and G1/2)
Ports: M5, G1/8, G1/4, G3/8 and G1/2
Nominal diameters: 1,5 mm (M5), 2 and 3 mm (G1/8),
4 and 6 mm (G1/4), 7 mm (G3/8 and G1/2)
The unidirectional flow controllers are equipped with M5, G1/8, G1/4, G3/8 and G1/2 ports.
G1/8 and G1/4 ports are available with two different types of adjustment, whereas M5, G3/8 and G1/2 ports have just one type of adjustment.
All models can be panel or wall mounted or they can be mounted on cylinders, as required.To choose the most suitable model, it is recommended to:
G1/8 and G1/4 ports are available with two different types of adjustment, whereas M5, G3/8 and G1/2 ports have just one type of adjustment.
All models can be panel or wall mounted or they can be mounted on cylinders, as required.To choose the most suitable model, it is recommended to:
- Calculate the quantity of air in Nl/min
- Determine the stroke time of the cylinder
- Check the flow diagrams.
General Data
| Construction | Needle-type |
| Valve group | Unidirectional and bidirectional controller |
| Materials | AL body – brass needle (not nickel-plated) – NBR seals |
| Mounting | With screws in the holes of the valve body or panel mounted |
| Threaded ports | M5 – G1/8 – G1/4 – G3/8 – G1/2 |
| Installation | As required |
| Operating temperature | 0°C ÷ 80°C (with dry air – 20°C) |
| Operating pressure | 1 ÷ 10 bar (for models with M5 – G1/8 – G1/4 ports) 2 ÷ 10 bar (for models with G3/8 – G1/2 ports) |
| Nominal pressure | 6 bar |
| Nominal flow | See graph |
| Nominal diameter Ø [mm] | M5 = 1,5 – G1/8 = 2 or 3 mm – G1/4 = 4 or 6 mm – G3/8 and G1/2 = 7 mm |
| Fluid | Filtered air If lubricated air is used, it is recommended to use ISOVG 32 oil. Once applied the lubrication should never be interrupted. |
Coding Example
| RF | U 4 | 8 | 2 | – | 1/8 |
| RF | SERIES |
| U 4 | FUNCTION U 4 = Unidirectional O 3 = Bidirectional |
| 8 | PORTS 4 = G1/4 5 = M5 6 = G3/8 7 = G1/2 8 = G1/8 |
| 2 | FLOW CONTROL RANGE 2 = Ø1,5 mm max (for ports M5) Ø2 mm max (for ports 1/8 only) 3 = Ø3 mm max (for ports 1/8 only) 4 = Ø4 mm max (for ports 1/4 only) 6 = Ø6 mm max (for ports 1/4 only) 7 = Ø7 mm max (for ports 3/8, 1/2 only) |
| 1/8 | PORTS M5 1/8 1/4 3/8 1/2 |
