What is Directional Control Valve in Hydraulic

Hydraulic directional control valves are more and more widely used in mechanical engineering, from the surrounding cars to the large lifting equipment on the construction site. The hydraulic directional control valve is composed of three parts: the valve body, the valve core and the device that drives the valve core to make relative movement in the valve body, and uses the relative movement of the valve core and the valve body to control the on-off of the valve port or the size of the valve port, so as to control the pressure, flow direction and flow of the liquid. The hydraulic directional control valve is essentially a kind of on-off valve, and the so-called directional control is to make the oil circuit on or off, or to make the flow converge and divert. To select a suitable directional valve according to the requirements of the system, the following factors must be taken into account:

(1) The rated pressure must make the rated pressure of the selected directional valve compatible with the working pressure of the system, and the maximum pressure of the hydraulic system should be lower than the rated pressure of the valve.

(2) The rated flow rate should be higher than the working flow, and the maximum flow rate through the directional control valve should generally not be greater than the rated flow rate of the valve. Also note the difference in flow due to the difference in area between the two sides of the single-acting hydraulic cylinder. Many company samples have begun to express the flow capacity of valves as flow versus differential pressure. When choosing, it is necessary to determine whether to meet the needs according to this curve. When the valve with different connection methods is the same, the rated flow rate is different, and the relevant product samples should be referred to for details. Generally, the characteristic curve of the directional valve will give the relationship between flow and pressure loss when different diameters, different spool valve functions and liquid flow directions.

(3) Spool valve function spool valve function refers to the form of the passage when the reversing spool valve is in the neutral position. Valves with different spool functions have different impact sizes when reversing, and the functions that can be realized are also different.

(4) Integral and split type some directional valves, especially multi-way valves. Its valve body is divided into integral type and split type. Stacking valves are also segmented.

(5) Response time In directional valves, this dynamic performance is often related to system requirements and is an important factor.

(6) Throttling characteristics directional control valve was originally a kind of on-off valve, and now it also uses its throttling function in the system. At this time, the flow rate and differential pressure curve of the valve can be used to select the valve to meet the hydraulic system requirements.

Elephant Fluid Power is a company specializing in the production of hydraulic products, is currently producing and selling a large number of hydraulic directional control valves, in the field of hydraulics, Elephant Fluid Power has accumulated a lot of experience, professional R & D team to ensure that the quality of their products is higher than most similar products on the market. Over the years, Elephant Fluid Power has accumulated a good reputation among customers, with a positive rating of 99%. Moreover, the production scale of elephant fluid power is large, the goods are reserved, so it can achieve rapid delivery, and can also customize related products according to customer requirements, so that customers are 100% satisfied, and the quality of these products will be the same as standard products. Moreover, Elephant Fluid Power has a one-year warranty period for all products, during which you can contact Elephant Fluid Power to help you solve any problems with the product, Elephant Fluid Power will provide you with technical support, and customers do not have to worry about what to do if it is damaged later. Even if unfortunately your product is damaged and needs to be replaced, Elephant Fluid Power has a large number of parts to match, these are cheap and good quality products, 100% suitable for the original.

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