Veljan Hydraulic pump is a brand of hydraulic vane pumps. Hydraulic vane pumps are commonly used in high-pressure hydraulic applications, such as: Supercharging, Power-steering, Air conditioning, Automatic transmission. Veljan vane pumps are available in four basic frame sizes and in single, double, triple, and drive train configurations. They have rated pressures up to 4650 psi (320 bar). Veljan vane pumps have a minimum speed rating of 400 rpm for mobile applications and 600 rpm for industrial applications. Veljan vane pumps are available in three main types: Unbalanced fixed displacement Balanced fixed displacement Variable displacement