Plunger Valves are the correct valve to use whenever pressure heads or flow rates need to be safely and reliably reduced and controlled. They are used for two main tasks:
- By restricting the valve opening a change in flow conditions occurs where both flow velocity through the valve and pressure across the valve increases, resulting in conditions that create cavitation
- To be able to control the pressure and flow precisely and finely, the valve's flow control characteristics must be as linear as possible over the whole opening range.
Thanks to their well thought out design, Pratt Series 300 Plunger Valves fulfill these requirements to the greatest possible degree and are therefore the ideal valve for numerous control tasks. Butterfly and gate valves, due to their design as isolation or, open/closed valves, are not suitable for continuous use as a variable flow control valve.