137 → www.festo.com/didactic Hydraulics Training Packages > Components > Pressure Regulators Hydraulics Pressure Regulators 1 Pilot control unit (joystick), 2x 2-channel Each channel has two pressure reducing valves that control the pressure from P to A or B. A and B are depressurized in the spring-centered neutral position. The hydraulic joysticks are used, for example, for remote or pilot control of the loadsensing mobile block. – Adjustment: Manual (2x joystick) – Operating pressure: 3.5 MPa (35 bar) – Maximum permissible pressure: 3.5 MPa (35 bar) – Low-leakage, self-sealing coupling nipples – Open connection nipple for unpressurized return flow (T) – Quick-action mounting system Quick-Fix Order no. 572147 2 Pressure balancer for open center load sensing The valve is required for load-sensing applications with a fixed displacement pump (open center). – Adjustment: Hydraulic – Differential pressure: 0.055 MPa (5.5 bar) – Operating pressure: 6 MPa (60 bar) – Maximum permissible pressure: 12 MPa (120 bar) – Low-leakage, self-sealing coupling nipples – Quick-action mounting system Quick-Fix Order no. 572123 3 Pressure balancer, upstream This pressure balancer ensures a volumetric flow rate independent of the load pressure. – Adjustment: Hydraulic – Differential pressure: 0.055 MPa (5.5 bar) – Operating pressure: 6 MPa (60 bar) – Maximum permissible pressure: 12 MPa (120 bar) – Low-leakage, self-sealing coupling nipples – Quick-action mounting system Quick-Fix Order no. 573023 1 4 Pressure balancer, downstream The pressure balancer ensures the volume flow is independent of the load pressure. If all the consumers together demand more volume flow than can be provided by the pump, the individual volume flows are reduced proportionally. The valve is used in load-sensing applications with an LS variable displacement pump (closed center). – Adjustment: Hydraulic – Differential pressure: 35 kPa (0.35 bar) – Operating pressure: 6 MPa (60 bar) – Maximum permissible pressure: 12 MPa (120 bar) – Low-leakage, self-sealing coupling nipples – Quick-action mounting system Quick-Fix Order no. 572741 5 Flush valve with pressure relief valve The valve is used to discharge oil in a closed hydraulic circuit. – Adjustment: Hydraulic and fixed pressure relief valve – Operating pressure: 6 MPa (60 bar) – Maximum permissible pressure: 12 MPa (120 bar) – Low-leakage, self-sealing coupling nipples – Quick-action mounting system Quick-Fix Order no. 572126 6 Shock and anti-cavitation valve The valve block contains two pressure relief valves (shock valves) to dissipate pressure peaks to T, and two suction valves to ensure supply to the consumer line even in the event of underpressure, e.g., due to load changes. Manual adjustment. – Adjustment: Manual – Operating pressure: 6 MPa (60 bar) – Maximum permissible pressure: 12 MPa (120 bar) – Low-leakage, self-sealing coupling nipples – Quick-action mounting system Quick-Fix Order no. 572148 2 3 4 5 6
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