Yuken manufactures single, fixed-displacement hydraulic vane pumps for extra high pressure applications. These pumps feature a maximum operating pressure of 1020 or 3630 psi. The company also produces single, fixed-displacement hydraulic vane pumps for small size tools requiring low pressure and small flow rates.  The maximum operating pressure for those pumps is 730 psi. Combination, fixed displacement vane pumps, with an operating pressure of 1020 psi, are also available.