High-pressure washers are generally divided into two types: hot water and cold water. However, commonly used hot water high-pressure washers typically operate at pressures not exceeding 250 bar. Hot water high-pressure washers are mainly used to clean stubborn dirt. They use an expansion tube for heating. When water passes through the expansion tube, the pressure inside is relatively high. If the tube's load-bearing capacity doesn't increase, the pressure of the hot water high-pressure washer won't increase either. However, increasing the tube's load-bearing capacity would increase costs. Therefore, the working pressure of a hot water high-pressure washer is around 200 bar. For higher pressure applications, a high-pressure cold water washer is generally used, relying on its operating pressure to achieve the cleaning effect. For cleaning oil stains and various stubborn dirt, a hot water high-pressure washer or a saturated steam washer should be used.
1. When operating a high-pressure washer: Always wear appropriate safety goggles, gloves, and a mask.
2. Always keep hands and feet away from the cleaning nozzle.
3. Regularly check all electrical connections.
4. Regularly check all liquids.
5. Regularly check the hoses for cracks and leaks.
6. Always keep the trigger in the safety lock position when the spray gun is not in use.
7. Always operate at the lowest possible pressure, but sufficient to complete the job.
8. Always release the pressure in the washer before disconnecting hoses.
9. Always drain the water from the hoses after each use.
10. Never point the spray gun at yourself or anyone else.
11. Never start the equipment until you have confirmed that all hose connections are locked in place.
12. Never start the equipment until the water supply is connected and an appropriate amount of water flows through the spray gun handle. Then connect the required cleaning nozzles to the spray gun handle.
Note: Do not leave the pressure washer unattended while operating. The pump will operate in bypass mode each time the trigger is released. If a pump has been operating in bypass mode for an extended period, the excessively high temperature of the circulating water will shorten the pump's lifespan or even damage it. Therefore, the equipment should be kept out of operation in bypass mode for extended periods.