Shijiazhuang Laiye Imort& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of modular restrictive check valve in China, also supports customized service. If you're going to wholesale high quality modular restrictive check valve made in China, welcome to get pricelist from our factory.
Custom properties
The modular restrictive check valve combines directional flow control with adjustable restriction in a compact, modular design. It permits free flow in one direction while providing precise, screw‑adjusted flow regulation in the opposite direction. This design supports easy integration into hydraulic systems and simplifies customization and maintenance.
The Z2FS6 is a compact modular valve that integrates both throttling and check‑valve functions. Mounted directly to hydraulic valve ports, it allows unrestricted reverse flow while offering continuously adjustable forward flow via a screw‑controlled orifice. Key features include a small footprint, responsive adjustment, and stable speed control of actuators.
Typical applications include precise single‑direction speed regulation or fast‑slow switching in hydraulic circuits. Examples include controlling the extension/retraction speed of concrete pump outriggers, adjusting mold‑closing speeds in injection molding machines, and smoothing movements in construction machinery.
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PRODUCT PARAMETERS |
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Specification |
6 |
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Max working pressure Mpa |
P / A / B ( Oil ports ) |
31.5 |
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T ( Oil ports ) |
16 |
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Max.Flow (L/min) |
80 |
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Design Number |
30 |
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Product description
Description:
The Z2FS...30C/.. type throttle valve is a double one-way superimposed throttle valve used to control the main flow or pilot flow of one or two working ports.
It can connect to two oil circuits of the working oil chamber simultaneously.
Two symmetrical one-way throttle valves adjust the flow in one direction by adjusting the cross-sectional area of the throttle orifice, and return oil in the other direction through a one-way valve. Inlet or outlet throttling can be achieved by selecting different installation positions or different models.
Main flow control: Installed between the directional valve and the base plate.
Pilot flow control: Installed between the pilot valve and the main valve.
Frequently asked questions about modular throttle check valves (Z2FS6)
Q: What are the main functions of this valve?
A: The Z2FS6 is a modular hydraulic valve that integrates adjustable flow control and check valve functions. It precisely controls unidirectional flow through an adjustment screw while maintaining free flow in the reverse direction, making it suitable for hydraulic circuits requiring unidirectional speed control or fast/slow speed switching.
Q: What does "modular" specifically mean?
A: This valve uses a standardized interface design and can be directly installed at the port location of various hydraulic valves without additional piping or complex modifications. Users can flexibly add or remove this module according to system requirements, facilitating system integration and future functional adjustments.
Q: How is the flow rate adjusted? What is the accuracy?
A: By rotating the adjustment screw on top of the valve, the throttle opening can be continuously changed, achieving stepless flow rate adjustment. The adjustment mechanism has good linearity and repeatability, supporting fine speed control, and is equipped with a locking nut to prevent loosening.
Q: Does it allow free flow in the reverse direction?
A: Yes. The reverse flow path has a built-in check valve, allowing fluid to pass through with almost no resistance and minimal pressure loss. This eliminates the need for an additional parallel check valve for rapid return or unloading of the actuator.
Q: What are the applicable working pressure and flow rate ranges?
A: This valve is suitable for conventional hydraulic system pressure ranges (up to 350 bar), with bore sizes covering 6-10 mm, supporting small to medium flow rate adjustment needs. Specific selection should be based on model parameters.
Q: What are some typical application scenarios?
A: Commonly used in:
Concrete pump truck outrigger extension speed control
Injection molding machine mold closing speed adjustment
Smoothness control of engineering machinery movements
Unidirectional feed speed control circuits for hydraulic cylinders
Q: What should be noted during installation?
A: Please keep the installation surface clean to prevent impurities from entering the valve. It is recommended to install a filter (recommended 25 μm accuracy) before the valve. When adjusting, make gradual fine adjustments and observe the actuator speed changes while the system is running.
Q: Does it provide leak-proof design?
A: This valve uses standard O-ring seals and undergoes pressure sealing tests before leaving the factory. If leakage occurs after long-term use, the seals can be replaced for maintenance.
Q: Can this valve be used in high-frequency or high-impact applications?
A: This valve is suitable for general industrial hydraulic systems. If the system involves strong impacts or high-frequency switching, it is recommended to consult a technical expert for an application assessment, and if necessary, install buffering or pressure stabilization devices.
For further information on selection parameters, troubleshooting, or support for special applications, please contact our technical department for detailed information.
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