Selection Of Hydraulic Directional Control Valve You Have To Consider These Factors

Selection of hydraulic directional control valve, you have to consider these factors

The hydraulic control valve refers to the element used to control the pressure, flow and direction of the liquid in the hydraulic transmission. It is the component with the most varieties and specifications and the most widely used in hydraulic technology.

The directional control valve is essentially a kind of on-off valve. The so-called directional control is to make the oil circuit on or off, or to converge and divert the flow. According to the requirements of the system to select a suitable directional valve, the following factors must be considered. Let’s take a look with Hanjiu Hydraulics!

(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 should be higher than the working flow, and the maximum flow through the directional control valve should generally not be greater than the valve's rated flow. Also note the difference in flow rate caused by the difference in area on both sides of the single-acting hydraulic cylinder. Many company samples have begun to express the flow capacity of the valve as the relationship curve between flow rate and pressure difference. When selecting, it is necessary to determine whether it meets the needs according to this curve. Different connection methods

When the valve has the same orifice diameter, the rated flow is also different. For details, please refer to the relevant product catalog. Generally, the characteristic curve of the directional valve will give the relationship between the flow rate and the pressure loss for different diameters, different spool valve functions and liquid flow directions.

(3) Sliding valve function Sliding valve function refers to the path form when the reversing spool valve is in the neutral position. Valves with different spool functions have different impact sizes during reversing and different functions that can be achieved.

(4) The operation mode should be selected according to the needs, such as manual, motorized (such as cam, lever, etc.), electromagnet control, hydraulic, hydraulic pilot valve control, etc.

(5) Integral and split type Some directional valves, especially multi-way valves. The valve body is divided into integral and split type. The stack valve is also a split type.

(6) Response time This dynamic performance in directional valves is often related to system requirements and is an important factor.

(7) Throttle characteristic The directional control valve was originally a kind of on-off valve, and now its throttle function is also used in the system. At this time, the valve flow and pressure difference relationship curve can be used to select valves to meet the requirements of the hydraulic system.

(8) Other functions of the valve Valves of different companies sometimes have different additional functions to reduce the selection of varieties.

(9) Installation and connection methods such as tube type, plate type and stacking type are available for selection.

(10) Serviceability means whether it is easy to buy and so on.

(11) Replaceability, such as whether the components of the original equipment can be replaced.

(12) The product's reputation, service life, maintenance convenience and supply situation.

(13) Media compatibility.

(14) Interface size.

(15) Dimensions and weight.

(1 6) Price.

A good hydraulic control valve should have the following characteristics at the same time:

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