Z2FS6B7-4X/2QV

The Z2FS6B7-4X/2QV valve belongs to the Z2FS Throttle Check Valves series from Bosch Rexroth and meters flow for precise actuator control in hydraulic automation. A rotary knob with a scale lets maintenance staff repeat the same throttle setting after service or adjustment. The throttling function is located on side B of the sandwich body, so designers can predict pressure drops in that return path. A maximum operating pressure of 315 bar enables installation in high-pressure circuits, while the ability to mount in any orientation simplifies manifold layout during machine design.

Compatibility with HL, HLP, HETG, HEES, HEPG, HFDU, and HFC fluids allows the same valve type to be used across mineral, synthetic, or water-glycol systems. The required cleanliness level of ISO 4406 (c) 20/18/15 establishes the filtration standard that protects throttling edges from contamination. An FKM seal package withstands elevated temperatures and aggressive additives common in modern hydraulic oils. When water-glycol HFC media is used, the pressure differential must not exceed 210 bar, ensuring stable operation without cavitation or premature wear.