This hand pump is for use with hydraulic lifting or pressing equipment, for emergency operation of hydraulic elevators, and for the pressure testing of hydraulic systems in general. This model is constructed for side mounting with Blain EV valves, including #10015805. The built-in relief valve should be adjusted to prevent unintentional high pressure from being applied to the system. A built-in manual valve for releasing pressure from the system is available as an option.