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News and information Current location: High pressure pipeline dredger > Clean technology >

Cause analysis of unstable pressure of high pressure cleaning machine

Number of hits: Release time: 14:43, September 17, 2018

If the inlet valve is not closed tightly, the high-pressure water will leak into the low-pressure system (water supply system). It is necessary to check whether the outlet flow of high-pressure water is reduced and whether the pressure drops, and whether the water supply pipe vibrates;
If the drain valve is not closed tightly, high-pressure water will leak between several stuffing boxes. It is necessary to check whether the outlet flow of high-pressure water decreases and whether the pressure drops, and whether the high-pressure hose shakes;
If the nozzle is worn, cracked and blocked, it will also lead to the change of flow and pressure, but there will be no shaking of water supply hose or high-pressure water pipe;
If the nozzle selection is too small, the nozzle flow and pump unit flow, speed matching is not appropriate, will produce serious periodic pressure fluctuations or can not reach the set pressure;
In case of pressure regulating valve seal failure, the residue of squeezed and torn sealing ring is jammed between the valve core and the valve sleeve, which causes the movement of the valve core to be blocked and the position of the valve core is out of alignment. There will be irregular changes in the outlet pressure, a large amount of water is discharged from the overflow port, the flow rate of high-pressure water outlet is reduced, and the pressure drop is reduced. At the same time, the abnormal sound in the pressure regulating valve is accompanied;
If the valve port of the valve core and valve seat is damaged and cannot be closed tightly, a large amount of water will be discharged from the overflow port, the flow rate of high-pressure water outlet will be reduced and the pressure will drop.