LEOPARD pressure reducing hydraulic diaphragm valve. Used in places where a diminution of the pressure is needed.
Leopard Pressure reducing hydraulic valve
Leopard pressure reducer valves are available from DN 20 to DN 300 diameter.
Leopard pressure reducer
Specifications
Applications
The pressure reducer valve is used in places where pressure is needed for:
- Adjust the pressure to consumption.
- Protect installations.
The pilot acts on the valve so that it has a modulating function, in order to keep the downstream pressure constant for the setting value.
Functioning
The pilot sets the downstream pressure regardless the inlet pressure. If the outlet pressure is lower than the preset pressure the pilot will open the valve and it will act just when the outlet pressure exceeds the preset one.
The reducer pilot must be adjusted regarding the installation needs. Turning the pilot screw clockwise you will reduce the outlet pressure. Turing the pilot anti-clockwise you will increase the outlet pressure.
- Maximum reduction ratio: inlet pressure x 1/3. For example, with a 6 bar inlet pressure the outlet pressure will be 2 bar. Working in pressure under 2 bar the valve will suffer cavitation complications.
- Precision ratio: preset pressure ±0,3 bar.
Dimensions
FAQ
1- Why does not the valve open?
There may be insufficient pressure at the inlet pressure valve, you should examine the insulation valves of the system upstream and downstream, if they are closed open to allow the passage of water and generate pressure.
Another reason may be that the solenoid is calcified, clean it and replace parts as necessary.
2- Why does not the valve regulate at the desired control point?
It may be caused by the pilot because it is not adjusted properly, check it by tightening and loosening the screwdriver to see if there is a pilot reaction, so you can adjust the pilot to the desired opening and closing speed.
Check if the upstream filter is clogged and causes insufficient pressure to reach the pilot to activate the valve at the desired control point.
3- Why does not the valve close?
It may be that the filter is clogged, to check it, disconnect the copper line from the lid to see if there is water flow in the inlet. In this case clean the filter mesh.
If the main valve membrane fails, it can also give this result, replace the membrane for repair.
Another reason may be that the solenoid is calcified, clean it and replace parts as necessary.
4- Why does the membrane leak water?
It is usually produced by the accumulation of dirt between the membrane and its closing support, closing the valve manually, if the problem persists open the valve to clean the area.
