Proportional pressure sequence valve EPDZA 06

• The EPDZA is used for more precise adjustment of consumer or system pressures, as it is independent of pressure fluctuations in the outflowing oil.
• For clamping and braking functions to ensure that a specific pressure is present before the oil can flow to other consumers.

The proportional pressure switching (or pressure sequence) valve EPDZA allows the oil coming from channel P to flow to channel A if a specific, proportionally adjustable opening pressure is exceeded.

If the pressure in channel P falls below the set value, the valve closes with low hysteresis.
In contrast to pressure relief valves, the actual opening pressure in channel P remains constant with the EPDZA, regardless of pressure fluctuations in channel A (prerequisite P < A).

The EPDZA consists of a remote-controlled mechanical pressure relief valve, which is pilot-controlled with a proportional pilot valve. The spring chamber of the pilot stage of the mechanical valve is relieved separately via channel T.

If the pressure fluctuations in channel T are negligible, the control oil of the prop. pressure relief valve can be routed to T (plug 1, see symbol image). Otherwise, it must be routed to channel B (plug 2). The valve has a mechanical maximum pressure setting. Below this setting, the valve operates proportionally.