***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth ZDZ6DP2-4X/150YM (R900503891) is a direct operated pressure sequence valve designed for sophisticated hydraulic systems requiring pressure-dependent connection of secondary circuits. With its sandwich plate design, it seamlessly integrates into systems to control the sequence of operations based on preset pressure conditions. This model, specifically engineered for high precision and reliability, features an adjustable compression spring that determines the sequencing pressure. In its default state, the spring maintains the control spool in a blocked position, preventing fluid flow. When the pressure in channel P reaches the set value of the compression spring, it actuates the control spool to connect channels P to P without any drop in pressure. This allows for efficient operation of connected systems once a certain threshold is met. The ZDZ6DP2-4X/150YM also includes external pilot oil return via bore to channel T Y and offers a pressure gauge connection for monitoring sequencing pressure directly at the valve. For versatility in application, this valve comes with different versions: Version P focuses on channel P for sequencing operations while Version A uses channel A for these purposes. The latter allows for internal control signal and pilot fluid supply from channel A and can be optionally equipped with a check valve for unrestrained hydraulic fluid return from A to A. This model is compliant with ISO porting patterns and offers various adjustment types such as rotary knob, threaded pin with hexagon and protective cap, lockable rotary knob with scale, or rotary knob with scale. The check valve feature is exclusive to version A of this type. Its robust design ensures reliable performance in controlling hydraulic sequences across diverse applications without compromising system integrity or efficiency.