Bosch Rexroth | Z2FS6-7-4X1QV
Z2FS6-7-4X/1QV
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The Z2FS6-7-4X/1QV throttle check valve is part of the Z2FS Throttle Check Valves series manufactured by Bosch Rexroth for hydraulic automation circuits where controlled bidirectional flow is required. The valve is built in size 6 and adopts a sandwich plate connection, allowing it to be stacked between standard subplates without external plumbing. Four ports follow the ISO 4401-03-02-0-05 pattern, so the unit fits directly beneath directional valves that share the same interface. Its housing tolerates operating pressures up to 350 bar, enabling installation in high-pressure manifolds. The bolt pattern centers are 61 × 40 mm, and each mounting hole has a diameter of 5.4 mm to match common M5 fasteners. When installed, the surface beneath the valve must meet a maximum roughness of Rz 4 to maintain sealing integrity.
Maximum flow through the Z2FS6-7-4X/1QV is limited to 80 L/min, while an internal pilot flow limitation further prevents pressure spikes during rapid directional changes. Fine adjustment lets the technician set a precise throttling gap without disassembling the stack. An FKM seal set resists mineral oils and high temperatures, ensuring leak-free service life. The valve is supplied without any locating hole, so centering pins from adjacent plates are not required. Hydraulic cleanliness of the working fluid must not exceed class 20/18/15 per ISO 4406, protecting the throttling edges from erosion. Installation references the NFPA T3.5.1 R2-2002 D03 diagram, giving consistent port lettering in North American layouts. Together, these features provide accurate flow restriction in compact manifolds.
Technical Specifications
Bolt Pattern (center Distance)
61 x 40 mm
Cleanliness Class (iso 4406(c))
20/18/15
Connection Type
Sandwich Plate
Fine Adjustment
Yes
Locating Hole
None
Max Flow
80 l/min
Max Operating Pressure
350 bar
Mounting Hole Diameter
5.4 mm
Mounting Surface Roughness
Rzmax 4
Nfpa Connection Diagram
T3.5.1 R2-2002 D03
Number Of Ports
4
Pilot Flow Limitation
Yes
Porting Pattern
ISO 4401-03-02-0-05
Seal Material
FKM
Size
6
1620 Old Apex Road
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