What information is needed to size a Pressure Reducing Valve (PRV)
Maximum Flow, Upstream (inlet) Pressure, Downstream (Outlet) Pressure. If possible, minimum flow.
What does the “NGE” designation mean in the catalogue number (for example: Model NGE90-01 versus 90GE-01)
The ‘90GE-01’ is a full port valve and ‘NGE90-01’ is a reduced ported valve. The ‘NGE’ has a high resistance to cavitation and is the most common valve type. ‘GE’ valves are suited to applications with lower pressure differentials and high flows.
How many straight pipe diameters are required either side of the valve.
The guideline is 5 pipe diameters each side, but can be less depending on valve function.
Can I install 2 pressure reducing valves in series?
A minimum of 10 pipe diameters separation is recommended to minimise the risk of pressure instability. Furthermore, we recommend using Direct acting valves such as the CLA-VAL AQUA/PRV/FL.