ZDC6XP-1X/8M

The ZDC6XP-1X/8M is manufactured by Bosch Rexroth for the ZDC Pressure Compensators series and serves to keep hydraulic actuators supplied with a stable pressure drop. It employs a 2-way design so flow is regulated between two main passages without extra return circuitry. The nominal size of 6 aligns with compact manifold cavities often used in mobile equipment. A porting pattern that follows DIN 24340 Form A lets the valve interchange seamlessly with standardized subplates. Four ports designated A, B, P, and T give separate connections for supply, work lines, and tank. Upstream sensing is established through a load-compensation channel connected to port P, ensuring the control spool reacts directly to inlet pressure. A fixed pressure differential of 8 bar keeps flow nearly constant even when load pressure fluctuates. The unit can be installed in any position, which simplifies piping on crowded power packs. System oil must be filtered to ISO 4406 class 20/18/15 to protect the throttling edges and the internal shuttle element.

The compensator tolerates operating pressures up to 250 bar, allowing use on medium-pressure circuits common in presses or steering systems. It passes a maximum flow of 35 l/min so moderate cylinder or motor speeds are attainable without cavitation. An integrated shuttle valve selects the higher work-port pressure for pilot control, eliminating the need for separate logic components. NBR seals contain the hydraulic fluid and withstand the temperature range typical of mineral oils. Four mounting holes drilled to 5.3 mm diameter match the manifold face and accept the specified fasteners. The recommended hardware consists of four M5 screws manufactured to ISO 4762 grade 10.9, which provide adequate clamping force against pressure-induced separation. Overall weight is 1.5 kg, enabling a single technician to position and tighten the valve during assembly.