HSSD5 multi-way directional control valves are mostly general-purpose hydraulic control components. Some models are also compatible with Walvor SD5 series valves. They are often used in hydraulic systems of small and medium-sized construction machinery and agricultural machinery. The following is its detailed information.：
1. **Core parameters**
|Parameter items|Specific values|
| —- | —- |
|Maximum working pressure|parallel/series circuit 315bar, 250bar when the series circuit is working alone; the maximum back pressure of the oil outlet T port is 25bar|
|Nominal flow rate|conventional is 45L/min|
|Number of links range|1-7 links, can be combined according to the number of execution components|
|Valve body material|High-strength cast iron, taking into account compression resistance and durability|
/Interface specifications/Adopt BSPP thread standard, P, C, A, B, and T ports are mostly 3/8″, and other threaded interfaces such as BSP and metric can also be customized|
|Medium temperature| When used with nitrile rubber seals, the applicable temperature is -20℃-80℃; when used with fluorine rubber seals, the applicable temperature is -20℃ -100℃|
|Spool valve function|Supports various types such as O, P, Y, A, etc., and adapts to the action needs of different actuators|
2. **Core features**
-**Strong functional integration**: Built-in main relief valve and load check valve can effectively limit the maximum pressure of the system, prevent overload of the actuator, and avoid the reverse impact of oil flow to ensure the stable operation of the hydraulic system.Some models can also reserve power output ports to adapt to the expansion needs of complex systems.
-**Flexible control methods**: Provide manual, flexible shaft, pneumatic control, electro-hydraulic control, electromagnetic control and other control methods, which can not only meet simple manual operation scenarios, but also adapt to the remote electronic control needs of automation equipment and adapt to the operation design of different equipment.
-**Wide adaptability**: In addition to adapting to conventional parallel oil circuits, some models also support series and series circuits, which can match a variety of design schemes of open hydraulic systems.Moreover, the spool is interchangeable, the spool with a diameter of 16mm can be flexibly replaced, and the maintenance and modification are convenient.
3. **Applicable scenarios**
Due to its stable performance and affordable price, the valve is suitable for the hydraulic control needs of small and medium-sized equipment.In the field of construction machinery, it can be used for boom control of small loaders, truck-mounted cranes, bucket action control of small excavators, etc.; In the field of agricultural machinery, it is suitable for tractor suspension lifting, combine harvester operation device drive, etc.; In addition, it can also be used for small sanitation equipment such as small sweeper brush drive and other scenarios.
4. **Related derivative models**
There are derivative models such as HSSD5-2 on the market, such as the 2-part spring return model, which adopts lever operation, comes with a relief valve, and has a nominal flow rate of 45L/min. It can directly replace the Walvor SD5 series of valves of the same specification, and it is more cost-effective. It is often supplied to equipment manufacturers as OEM supporting parts.

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