HYDRAULIC PUMP A20VLO...CONTROLLERS -2

https://www.facebook.com/M.Naguib.fouda Axial Piston Variable Double Pump A20VO Series 1 for open circuits Variable pump with two axial piston rotary groups in swashplate design for use in open circuit hydrostatic drives For use in mobile and stationary applications The pump consists of proven components from the A11VO variable pumps The pump operates under self-priming condition, with tank pressurisation or with charge pump (sizes 190...260) A wide variety of controls are available Setting of the constant power control is possible via external adjustments, even when the unit is operating (only with power contol). The pump is available with a through drive to mount a gear pump or a second axial piston pump Output flow is proportional to drive speed and pump displacement and is steplessly variable between maximum and zero displacement Further technical datas as soon as control devices see for sizes 95 ... 260 RE 92500 (A11VO) TYPES OF CONTROLLERS A20VLO...LG2S CONSTANT POWER CONTROL A20VLO…EPD ELECTRICAL PROPORTIONAL CONTROL The pressure cut-off function is integrated into the pump control module and is preset to a specified value at the factory. Setting range from 50 to 350 bar LRE Power control with pressure cut-off, 2-stage By connecting an external pilot pressure to port Y, the basic value of the pressure cut-off can be increased by 50 +20 bar and a 2nd pressure setting implemented. This value is usually above the primary pressure relief valve setting and therefore disables the pressure cut-off function. The pressure signal at port Y must be between 20 and 50 bar. LR... Power control with stroke limiter The stroke limiter can be used to vary or limit the displacement of the pump continuously over the whole control range. The displacement is set in LRH with the pilot pressure pSt (max. 40 bar) applied to port Y or in LRU by the control current applied to the proportional solenoid. A DC current of 12V (U1) or 24V (U2) is required to control the proportional solenoid. The power control overrides the stoke limiter control, i.e. below the hyperbolic power characteristic, the displacement is controlled by the control current or pilot pressure. When exceeding the power characteristic with a set flow or load pressure, the power control overrides and reduces the displacement following the hyperbolic characteristic. To permit operation of the pump displacement control from its starting position Vg max to Vg min, a minimum control pressure of 30 bar is required for the electric stroke limiter LRU1/2 and the hydraulic stroke limiter LRH2/6. The required control pressure is taken either from the load pressure, or from the externally applied control pressure at the G port. #PUMP_VARIABLE_DISPLACEMENT_A20VLO