Bosch Rexroth | Z2FS6-5-4X2Q
Z2FS6-5-4X/2Q
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The Z2FS6-5-4X/2Q throttle check valve is produced by Bosch Rexroth for the Z2FS Throttle Check Valves series and serves to meter flow in hydraulic automation circuits. This sandwich plate design with nominal size 6 fits D03 manifolds and uses mechanical actuation to control oil without external energy. Flow adjustment is handled by a spindle equipped with an internal hex and a scale so settings can be repeated during service. The hex recess measures 5 mm and accommodates standard Allen keys. The valve throttles on both A and B sides, allowing bidirectional restriction under load. It passes up to 80 l/min while holding system pressure to a limit of 350 bar, permitting moderate flow rates at high pressure. These characteristics suit compact power units where precise, manually set flow control is required.
The valve operates in any installation position, giving designers freedom in manifold orientation. Four working ports support typical directional valve stacks, and they follow the ISO 4401-03-02-0-05 porting pattern to ensure interchangeability. Circuit cleanliness must reach ISO 4406 (c) 20/18/15 to protect the throttling gap from wear. Sealing is provided by NBR elastomers for use with common mineral-oil fluids. Mounting uses either four M5 screws to ISO 4762 grade 10.9 or four #10-24 screws to ASTM A574, matching metric or UNC hardware preferences. The assembly weighs 1.2 kg, keeping stack mass low for maintenance tasks. These details complete the dimensional, fastening, and contamination requirements for reliable operation.
Technical Specifications
Actuation Type
Mechanical
Adjustment Type
Spindle With Internal Hex And Scale
Cleanliness Class
ISO 4406 (c) 20/18/15
Installation Position
Any
Internal Hex Size
5 mm
Max Flow
80 l/min
Max Operating Pressure
350 bar
Mounting Screws (metric)
4x M5 (ISO 4762, 10.9)
Mounting Screws (unc)
4x #10-24 (ASTM A574)
Mounting Type
Sandwich Plate (D03)
Nominal Size
6
Number Of Ports
4
Porting Pattern
ISO 4401-03-02-0-05
Seal Material
NBR
Throttle Sides
A and B
Weight
1.2 kg
1620 Old Apex Road
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