The Pressure Sequence Valve Type 2URHD 6, manufactured by Ponar Silesia®, operates to shift a system or any other variation of a system on (version Z2) or off(version Z1) when a preset pressure is achieved. This unit has a size of 6. In addition, it can hold up to a maximum pressure of 31.5MPa and a flow of up to 30dm³/min.