Analysis of hydraulic system of electric pallet truck

We will consider many factors when choosing an electric pallet truck daily, such as: performance, price, brand, etc. Among them, the common sense and attention points of the solenoid valve of the hydraulic system of the electric pallet truck It deserves our attention. Then, let's talk about the reliability and applicability of the hydraulic system of the electric pallet truck.

1. Reliability

1. The solenoid valve is divided into normally closed and normally open. We generally choose the normally closed type, which is opened when power is on, and closed when power is off; It should be reminded that when the pallet truck is used more frequently, the normally open type should be selected when the use time is longer than the rest time.

2. The solenoid valve has no waterproof function, please choose the waterproof type under necessary conditions.

3. When the action time is very short and the frequency is high, it is recommended to choose the direct-acting type, and the quick-acting series for large calibers.

4. In addition, the electric pallet truck manufacturer also recommends that the high nominal pressure of the solenoid valve must exceed the high pressure in the pipeline, in order to prevent shortened service life or other accidents. Appear.

5. In the environment with corrosive liquid, all stainless steel type should be used; strong corrosive fluid should use plastic king solenoid valve.

II. Applicability

1. The fluid in the pipeline should be consistent with the medium calibrated in the selected solenoid valve series, and the temperature of the fluid should be It should be less than the calibration temperature of the solenoid valve.

2. The allowable liquid viscosity of the solenoid valve is generally below 20CST, and if it is greater than 20CST, it should be indicated.

3. The power supply current and power consumption should be selected according to the output capacity. Generally, the power supply voltage is not allowed to be about plus or minus 10%. It must be noted that the VA value is high during AC starting.

4. When the maximum pressure difference in the pipeline is less than 0.04MPA, direct-acting and step-by-step direct-acting should be used; when the low working pressure difference is greater than 0.04MPA, a pilot-operated (differential pressure) solenoid valve can be used ; High working differential pressure should be less than the maximum calibration pressure of the solenoid valve.

5. When the fluid cleanliness is not high, a filter should be installed in front of the solenoid valve. Generally, the solenoid valve requires better cleanliness for the medium. In addition, pay attention to the flow orifice and the diameter of the nozzle. Generally, the solenoid valve is controlled by only two switches. If conditions permit, please install a bypass pipe for easy maintenance.

The above is about the reliability and applicability of the hydraulic system of the electric pallet truck. I hope it can be helpful to everyone in the daily choice of electric pallet trucks.

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