Bosch Rexroth | Z2FS6-2-431QV
Z2FS6-2-43/1QV
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The Z2FS6-2-43/1QV belongs to the Z2FS Throttle Check Valves series from Bosch Rexroth and serves to meter flow in both directions of a hydraulic line so that actuators move at controlled speeds. Mechanical actuation eliminates the need for pilot pressure or solenoids, keeping the assembly compact. The nominal size 6 body corresponds to NFPA D03 cavity dimensions, and the sandwich plate mounting format lets the valve be stacked between a sub-plate and additional control elements. A porting pattern of ISO 4401-03-02-0-05 lines the A and B passages with standardized centers, while the dual flow paths of A1→A2, B1→B2 or A2→A1, B2→B1 allow identical throttling on supply and return. FKM seals resist mineral oil and many synthetic fluids, and the permitted ambient temperature of −20 to +80 °C supports operation in typical industrial or mobile machine enclosures.
A setscrew with a lock nut provides the primary restriction setting, and the fine-adjustment feature identified by code 1Q lets maintenance personnel trim flow without disturbing the main stop. The valve tolerates hydraulic media from −20 to +80 °C, reaching a maximum flow of 80 l/min when used within the rated operating pressure of 350 bar. A cleanliness class of ISO 4406 20/18/15 helps protect the throttling gap from abrasive particles, while a viscosity window of 10 to 800 mm²/s keeps the pressure drop predictable across changing oil grades. Together, these limits allow the unit to regulate actuator speed accurately in automated presses, test stands, and mobile work functions where stack-mounted components simplify manifold design.
Technical Specifications
Actuation Type
Mechanical
Adjustment Type
Setscrew With Lock Nut
Ambient Temp Range
-20 to +80 °C (FKM)
Cleanliness Class
ISO 4406 20/18/15
Fine Adjustment
Yes (1Q)
Flow Paths
A1→A2, B1→B2 or A2→A1, B2→B1
Fluid Temperature Range
-20 to +80 °C (FKM)
Max Flow
80 l/min
Max Operating Pressure
350 bar
Mounting Type
Sandwich Plate
Nfpa Size
D03
Nominal Size
6
Porting Pattern
ISO 4401-03-02-0-05
Seal Material
FKM (V)
Viscosity Range
10 to 800 mm²/s
1620 Old Apex Road
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