A new customer required a Parker Denison R5U (R5U12) relief valve, which was to be mounted directly onto a pump. The valve is now being delivered to the customer.
Series R5U pilot operated pressure unloading valves have a comparable design to the subplate mounted R4U series. The SAE flanges allow the valve to be mounted directly onto the outlet flanges of pumps.
A typical application is the unloading of a pump in an accumulator circuit. The combination of an R5U, C5V and R5V on a double pump generates a high pressure/low pressure pump system without the need of a manifold block or piping between the valves.
Some of the features of the R5U relief valve include:
- Operating pressures between 30 - 350 bar
- A maximum flow of up to 600 l/min
- A fluid temperature range between -18° - +80°
- A viscosity range between 10 – 650 cSt