Z2FS22 Rexroth Throttle Check Valve 315bar

Product Overview:

The Z2FS22 series (including specific models like Z2FS22-30B/S) is a high-performance, sandwich plate design double throttle check valve. It is engineered to restrict the main fluid flow to one or two actuator ports, allowing for highly precise speed control of hydraulic cylinders and motors. Manufactured strictly to original Rexroth engineering specifications, our Z2FS22 valves feature a standard modular sandwich architecture, guaranteeing 100% drop-in interchangeability. To ensure maximum reliability and precision under demanding industrial conditions, every single valve undergoes 100% simulated full-load operational testing prior to dispatch.

Technical Specifications:

• Model Series: Z2FS22 (including Z2FS22-30B/S, Z2F, Z2FS series)

• Nominal Size: NG22 (CETOP 08, conforming to ISO 4401-08-08-0-05)

• Max. Operating Pressure: 315 bar (4568 psi)

• Max. Flow Rate: Up to 360 L/min

• Control Method: Two-way flow adjustment (configurable for meter-in or meter-out control)

• Adjustment Type: Spindle with internal hexagon (S-type) or rotary knob with scale

• Operating Fluid: Mineral oil (HL, HLP) according to DIN 51524

• Temperature Range: -30°C to +80°C (with NBR or FKM seals)

• Weight: Approx. 8.1 kg

Key Technical Advantages:

1. Micron-Level Precision Throttling: The throttle spools and sleeves are micro-ground and honed to provide highly linear flow adjustment across various pressure gradients. This ensures exceptionally smooth, jerk-free movement of actuators.

2. 100% Seamless Interchangeability: The mounting footprint strictly complies with ISO 4401 standards. It serves as a direct, bolt-on replacement for original Rexroth Z2FS22 valves without any modifications to existing manifolds or piping systems.

3. High-Strength Materials & Anti-Fatigue Processing: Cast from high-grade ductile iron and treated with advanced anti-corrosion coatings. The pressure-bearing components undergo carbonitriding, significantly enhancing wear resistance and fatigue strength under high-pressure cycling.

4. Zero-Leakage Check Valve Integration: The built-in, highly sensitive check valves utilize a poppet-type hard seal structure. This enables rapid, leak-free isolation in the reverse flow direction, ensuring absolute safety during load reversals.

Application Areas:

• Heavy Presses & Forging Equipment: For speed control in main or auxiliary cylinders to prevent runaway speeds caused by gravity or sudden impacts.

• Large Injection Molding Machines: Accurately adjusting the cushioning speed of clamping cylinders to enhance process stability.

• Metallurgical & Steel Mill Machinery: Providing reliable speed regulation for large-scale hydraulic drives in high-vibration, high-pressure environments.

• Marine & Offshore Engineering: Speed limiting and protection in hydraulic circuits for winches and lifting mechanisms.

Expert Maintenance Tips:

• Verify Metering Configuration: The Z2FS22 can function as either a meter-in or meter-out control valve depending on its orientation (flipped about the horizontal axis). Always verify the nameplate and system schematic before installation to prevent reversed functionality.

• Maintain Strict Fluid Cleanliness: Fine contaminants can easily block the throttle opening or cause the spool to stick. It is highly recommended to maintain system fluid cleanliness at ISO 4406 class 20/18/15 using high-precision return filters.

• Proper Torque & Seal Inspection: Use Grade 10.9 tie rods for sandwich valve assembly and tighten diagonally to the specified torque. Always inspect or replace the O-rings on the mounting surface during reassembly to prevent high-pressure inter-layer leakage.