Bosch Rexroth | Z2FS6B5-4X2QV
Z2FS6B5-4X/2QV
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The Z2FS6B5-4X/2QV valve belongs to the Z2FS Throttle Check Valves series from Bosch Rexroth and is used in hydraulic automation to meter flow and create pressure-dependent damping in manifold circuits. It is built for a nominal size 6 interface, allowing direct mounting on CETOP 03 manifolds without adapters. The ISO 4401-03-02-0-05 and NFPA T3.5.1 R2-2002 D03 porting patterns keep the flow paths compatible with common subplates. A maximum operating pressure of 350 bar lets the unit handle high-pressure pump outlets, while a maximum flow of 80 l/min covers medium-capacity actuator lines. Throttling takes place on side B, so circuit designers can position the restrictor where backpressure is required. The spindle with an internal hexagon and scale provides repeatable adjustment; a SW5 hex key fits the spindle, and a SW10 wrench secures the lock nut so settings remain stable under vibration.
Four N10-24 UNC ASTM A574 mounting screws anchor the 1.2 kg housing to the manifold and maintain sealing integrity during pressure cycles. An FKM seal set resists mineral oil and many synthetic fluids, extending service life in mixed-media systems. The valve operates in ambient temperatures from -20 °C to 80 °C, so it can be installed on outdoor machines that face seasonal swings. Any installation position is acceptable, giving machine builders flexibility when space is limited. Cleanliness class ISO 4406 20/18/15 establishes the maximum particle level the hydraulic fluid must meet to avoid throttling edge wear and sticking. Together, these characteristics support reliable metering and pressure management in light and heavy industrial equipment.
Technical Specifications
Adjustment Type
Spindle With Internal Hexagon And Scale
Ambient Temp Max (fkm)
80 C
Ambient Temp Min (fkm)
-20 C
Cleanliness Class
ISO 4406 20/18/15
Installation Position
Any
Internal Hex Size
SW5
Lock Nut Wrench Size
SW10
Max Flow
80 l/min
Max Operating Pressure
350 bar
Mounting Screws
4x N10-24 UNC ASTM A574
Nominal Size
6
Porting Pattern (iso)
ISO 4401-03-02-0-05
Porting Pattern (nfpa)
T3.5.1 R2-2002 D03
Seal Material
FKM
Throttle Side
B
Weight
1.2 kg
1620 Old Apex Road
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