To adjust the pressure reducing valve on a Caleffi (specifically, referring to the Caleffi 5335 series as an example), locate the adjustment screw under the plastic cover and turn it. Turning the screw clockwise increases the outlet pressure, while turning it counter-clockwise decreases the pressure.
Here's a more detailed breakdown:
Adjusting a Caleffi Pressure Reducing Valve
Caleffi pressure reducing valves, like the 5335 series, are typically pre-set at the factory to a specific pressure (e.g., 500 kPa). However, you can adjust this pressure if needed. Follow these steps:
- Locate the Adjustment Screw: Find the adjustment screw. This is usually located on the top of the valve body and is protected by a plastic cover.
- Remove the Cover: Carefully remove the plastic cover to expose the adjustment screw.
- Adjust the Pressure:
- Increase Pressure: Turn the screw clockwise to increase the downstream pressure.
- Decrease Pressure: Turn the screw counter-clockwise to decrease the downstream pressure.
- Monitor the Pressure: Use a pressure gauge installed downstream of the valve to monitor the outlet pressure as you make adjustments. Make small adjustments and allow the pressure to stabilize before making further changes.
- Replace the Cover: Once you have set the desired pressure, replace the plastic cover to protect the adjustment screw.
Important Considerations:
- Consult the product's specific manual: Always refer to the specific manual for your Caleffi pressure reducing valve model, as adjustment procedures can vary slightly.
- Use a pressure gauge: Accurately measure the downstream pressure with a pressure gauge while adjusting.
- Make small adjustments: Avoid making large adjustments at once. Gradual adjustments allow for better control and prevent overshooting the desired pressure.
- Pressure fluctuations: Note that water pressure can fluctuate slightly depending on water usage in the system.
