How to check the pressure of a high-pressure cleaning pump?

1. Directly observe the pressure gauge
Pressure gauge: Most high-pressure cleaning pumps are equipped with a pressure gauge, which is the most intuitive way to check the pressure. Before starting the cleaning pump, make sure that the pressure gauge pointer is at zero and the dial is clear and has no signs of damage. After starting the pump, wait for the pump to run stably and observe the position of the pressure gauge pointer. The value indicated by the pointer is the current outlet pressure of the pump. It should be noted that the range of the pressure gauge should match the working pressure range of the pump. For example, if the working pressure of the pump is between 0-50MPa, a pressure gauge with a range of about 0-60MPa should be selected to ensure the accuracy of the measurement and avoid damage to the pressure gauge.
Pressure sensor and display (if any): Some advanced high-pressure cleaning pumps are equipped with a pressure sensor and a digital display. The pressure sensor converts the pressure signal into an electrical signal, and then displays the pressure value on the display through the controller. When checking, also observe the pressure reading on the display after the pump starts and stabilizes. Compared with pressure gauges, pressure sensors and digital displays can provide more accurate pressure measurements and can be easily integrated with control systems for automated control.
2. Check with external calibration equipment
Portable pressure calibrator: If you have doubts about the accuracy of the pressure gauge that comes with the pump, you can use a portable pressure calibrator to check. Connect the calibrator to the pressure test point of the pump (usually near the outlet of the pump) to ensure that the connection is tight and leak-free. After starting the pump, read the values ​​of the calibrator and the pressure gauge that comes with the pump at the same time to compare whether the two are consistent. Portable pressure calibrators are generally more accurate and can accurately detect the pressure of the pump. They can also be used to regularly calibrate the pressure gauge of the pump to ensure its measurement accuracy.
Cross-comparison with standard pressure gauges: If there is no pressure calibrator, you can also use a standard pressure gauge with a known higher accuracy for cross-comparison. Connect the standard pressure gauge to the pressure test point of the pump and measure the pressure at the same time as the pressure gauge that comes with the pump. The standard pressure gauge should be calibrated and its accuracy level should be higher than or equal to the accuracy level of the pressure gauge that comes with the pump. By comparing the readings of the two, you can determine whether the pressure gauge that comes with the pump is accurate, and then determine whether the pressure of the pump is normal.
3. Indirectly judge the pressure based on the cleaning effect
Observe the cleaning intensity: During the cleaning process, observe the impact intensity of the high-pressure water flow on the cleaning object. If the stains to be cleaned are stubborn, such as graffiti on the exterior walls of buildings, oil stains on industrial equipment, etc., the water flow under normal pressure should be able to effectively wash away the stains. If it is found that the impact force of the water flow is significantly weaker, it can only wash away the floating dust on the surface of the stain, but cannot remove the stubborn part, which may indicate that the pressure is low. On the contrary, if the impact force of the water flow is too strong, resulting in damage to the surface of the cleaning object, such as car paint being washed away, building materials being washed away and damaged, it is likely that the pressure is too high.
Check the cleaning range: Pay attention to the range that the high-pressure water flow can cover. Taking the cleaning of the floor as an example, under normal pressure, the water flow sprayed by the nozzle can reach a certain distance and angle to cover the corresponding area. If the pressure is insufficient, the cleaning range will be significantly reduced, and the nozzle may need to be moved closer to the cleaning object or the cleaning time may be extended to complete the cleaning task. When the pressure is too high, the cleaning range may exceed expectations, resulting in a waste of water resources, and may affect surrounding areas that do not need to be cleaned. Although this method of indirectly judging the pressure through the cleaning effect is not accurate enough, it can be used as a preliminary means to check whether the pressure is normal.