Water hydraulic pumps are hydraulic pumps that use water as the working fluid instead of oil. They are used to generate high pressure water flow for various applications, including cutting, drilling, forming, and testing. Water hydraulic pumps work on the same principle as traditional hydraulic pumps, where mechanical energy is converted into hydraulic energy to generate high-pressure water flow. However, water hydraulic pumps have some differences, such as their ability to handle higher speeds and their lower viscosity compared to oil-based hydraulic pumps.