The Z2FS22-30/S2 Type Modular Restrictive Check Valve is a high-flow sandwich plate hydraulic flow control valve designed to restrict oil flow in one direction while allowing free reverse flow through integrated check valves. Featuring a modular double throttle/check valve structure, the valve provides accurate actuator speed control, stable hydraulic performance, and reliable operation in high-flow hydraulic systems. It is widely used in industrial hydraulic equipment, hydraulic power units, metallurgical machinery, construction machinery, and automation systems.

Working Principle

The Z2FS22-30/S2 modular restrictive check valve consists of two symmetrically arranged throttle/check valve assemblies. Hydraulic oil is throttled in one direction through adjustable throttle spools to regulate actuator speed, while the integrated check valves allow free flow in the opposite direction with minimal resistance.

The “S2” version indicates:

• Meter-out flow control
• Outlet throttling configuration
• Suitable for stable load control and motion damping applications

The sandwich plate structure allows direct installation between directional valves and subplates without additional piping, simplifying hydraulic manifold design and reducing leakage points.

Applications

The Z2FS22-30/S2 modular restrictive check valve is widely used in:

• Hydraulic power units
• Industrial automation systems
• Metallurgical equipment
• Construction machinery
• Hydraulic presses
• Injection molding machines
• Heavy-duty machine tools
• Agricultural machinery
• Mobile hydraulic equipment