Product Description:

Advantages and features of Yuyan electro-hydraulic directional valve

‌High dynamic response and control accuracy‌

Adopting electro-hydraulic proportional technology and fast electromagnetic drive mechanism, the response time is short (typical value ≤50ms), suitable for high-precision, high-frequency switching industrial scenarios (such as servo control systems);

Low hysteresis and optimized valve core design ensure that the flow switching repeatability error is ≤2%, improving the operation stability of the equipment.

‌Excellent sealing performance and compact structure‌

The seat valve type structure is combined with conical sealing technology, the sealing surface contact pressure is uniform, and the leakage is only 1/5 of the sliding valve type reversing valve, which is suitable for high-pressure (≤35MPa) systems;

Modular compact design (such as DSHG series volume is 30% smaller than traditional valves), suitable for space-constrained installation environments (such as injection molding machine valve groups).

‌Diverse control modes and adaptability‌

Supports external oil pilot control (auxiliary oil source required) and internal oil control (main oil circuit branch oil supply), adapting to different system configuration requirements;

Optional zero-turn spool, overlapping valve core and other structures, compatible with various sliding valve functions such as mid-position unloading and pressure holding (such as P-A/B-T type), simplifying complex circuit design.

‌High reliability and environmental tolerance‌

The valve core is made of 60HRC high-hardness alloy steel, combined with ductile iron valve body, to withstand transient hydraulic shock (instantaneous peak ≤42MPa) and dusty and humid environment;

Built-in silent steel ring baffle, the operating noise is reduced by more than 40%, meeting the requirements of silent environmental protection.

Precautions for using the Youyan electro-hydraulic directional valve

‌Installation and commissioning specifications‌

The cleanliness of the hydraulic oil must meet the NAS 1638 7-9 standard. Before installation, the pipeline must be flushed and equipped with a 10μm filter to prevent the valve core from getting stuck;

When internal oil control is used, a back pressure valve (pressure ≥1MPa) must be added to the return oil pipeline under the neutral unloading condition to avoid insufficient control pressure of the main valve.

‌Control mode selection and restrictions‌

External oil control requires a separate auxiliary oil source (low-pressure pump is recommended) to avoid high-pressure energy waste in the main system;

High-frequency switching scenarios (such as injection molding machines) require the temperature rise of the electromagnet to be verified (≤80℃) to prevent the coil from overheating and failure.

‌Maintenance and troubleshooting‌

Check the flexibility of the valve core movement and the wear of the seals every 500 hours, and replace the hydraulic oil and clean the oil tank every 2000 hours;

If the switching is stuck, prioritize checking for foreign matter blockage (focus on checking the pilot valve filter element) or insufficient thrust of the electromagnet (test the coil resistance value).

‌Measures for special working conditions‌

When starting in a low temperature environment (≤5℃), the oil needs to be preheated to above 15℃ to prevent the viscosity from being too high and causing switching delay;

When multiple valves are used in parallel, the signal synchronization needs to be calibrated to avoid hydraulic shock (it is recommended to install a buffer valve or accumulator).

Appendix: Typical application scenarios

‌Injection molding machine and die casting machine‌: Accurate timing control of mold opening and closing and ejection action is achieved through rapid reversing;

‌Construction machinery‌: Integrated with proportional amplifier to achieve coordinated movement of multiple actuators of excavators.

FAQ

Q1: Wonder if you accept small orders?
A1: Do not worry. Feel free to contact us .in order to get more orders and give our clients more convener ,we accept small order.

Q2: Can you send products to my country?
A2: Sure, we can. If you do not have your own ship forwarder, we can help you.

Q3: What's your payment terms ?
A3: By T/T,LC AT SIGHT,100% full payment.

Q4: How long is your production lead time?
A4:It depends on product and order qty. Normally, it takes us 15 days for an order with MOQ qty.

Q5: When can I get the quotation ?
A5: We usually quote you within 24 hours after we get your inquiry. If you are very urgent to get the quotation.Please call us or tell us in your mail, so that we could regard your inquiry priority.