Bosch Rexroth | Z2FS6-7-4X2QV
Z2FS6-7-4X/2QV
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The Z2FS6-7-4X/2QV valve is produced by Bosch Rexroth as part of the Z2FS Throttle Check Valves series. It is a double throttle check valve intended to meter flow in hydraulic automation circuits while preventing reverse flow. Nominal size 6 keeps the envelope compact for D03 manifold stations, and the device follows the ISO 4401-03-02-0-05 porting pattern to match industry-standard subplates. The matching NFPA mounting pattern T3.5.1 R2-2002 D03 further simplifies interchange in North American blocks. A rotary knob with a scale lets the operator set the throttling orifice without external tools, giving repeatable adjustment when commissioning or fine-tuning motion profiles. Flow limitation acts on the main line designated 2Q so feed velocity can be reduced without affecting pilot passages. Both the A and B service ports include check elements, ensuring bidirectional load holding. The valve withstands operating pressures up to 350 bar and supports flows up to 80 l/min, allowing it to regulate medium-capacity actuators under high system pressure.
To protect the hydraulic system, the Z2FS6-7-4X/2QV accepts fluids with viscosities from 10 to 800 mm²/s and tolerates fluid temperatures between −20 °C and +80 °C while the same −20 °C to +80 °C range applies to ambient conditions around the manifold. FKM seals are fitted to resist heat and mineral-oil based media within those limits. System cleanliness must reach ISO 4406 class 20/18/15 or better so the throttling gap stays free from abrasive particles. Internal leakage remains below 1 l/min at a differential pressure of 350 bar, helping maintain actuator position accuracy and energy efficiency. Because there is no locating hole, installers must use external dowels or bolt patterns for repeatable positioning during maintenance. The specified viscosity span also covers most common mineral oils and some synthetic blends used in presses, molding machines, and mobile rigs.
Technical Specifications
Adjustment Type
Rotary Knob With Scale
Ambient Temp Range (fkm)
-20 to +80 °C
Cleanliness Class
ISO 4406 (c) 20/18/15
Flow Limitation
Main (2Q)
Fluid Temp Range (fkm)
-20 to +80 °C
Locating Hole
None
Max Flow
80 l/min
Max Leakage (Δp 350 Bar)
< 1 l/min
Max Operating Pressure
350 bar
Nfpa Pattern
T3.5.1 R2-2002 D03
Nominal Size
6
Porting Pattern
ISO 4401-03-02-0-05
Seal Material
FKM
Throttle Check Sides
A And B
Valve Type
Double Throttle Check Valve
Viscosity Range
10 to 800 mm²/s
1620 Old Apex Road
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