136 24-month Festo Didactic warranty Hydraulics Training Packages > Components > Pressure Regulators Hydraulics Pressure Regulators 1 3 1 Pressure relief valve The valve limits the pressure at port P to the set value relative to the pressure at T. – Adjustment: Manual – Including the non-return 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. 544335 2 Pressure relief valve, compensated The valve limits the pressure at port P to the set value relative to the pressure at T. The pressure on T has no influence on this value, as the spring space of the pressure limiter is balanced. – Adjustment: Manual – Including the non-return 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. 567237 3 Pressure relief valve, piloted The valve can limit larger volume flows in pressure than is possible with a directly controlled valve. The valve limits the pressure, corresponding to the spring of the main stage and the pilot pressure at X, from port P to port T. – Adjustment: Manual – Hydraulically piloted – Control pressure accessible through connection X – Separate tank connection Y of the pilot control stage – 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. 8025067 4 4 3-way pressure reducing valve The valve keeps the pressure set at port A constant, compensating for fluctuations in supply pressures and consumer loads. If the pressure at A rises above the set value, a connection opens from A to T. – 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. 544337 5 Pressure sequence valve The valve connects P to T when the pressure at X is greater than the sum of the spring force and the pressure in connection T. – 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. 544341 6 Proportional pressure relief valve The valve is used to limit the pressure. The limiting pressure is adjusted by the proportional solenoid. – Actuation: Proportional solenoid – Operating pressure: 6 MPa (60 bar) – Maximum permissible pressure: 12 MPa (120 bar) – Valve connection diagram, hydraulic ISO/DIN 4401 size 02 – Low-leakage, self-sealing coupling nipples – Operating voltage: 24 V DC – Nominal current: 800 mA – Connection, electrical: 4 mm safety sockets – Quick-action mounting system Quick-Fix Order no. 544351 5 6 2 7 7 Counterbalancing valve The valve (also known as a counterbalancing valve) ensures controlled lowering speeds of drives. As the control pressure on X increases, the set value of the pressure limitation decreases. A non-return valve flows around the pressure relief valve from T to P. – Adjustment: Manual (with tool) – Area ratio of X to P is 1:3 – Including the non-return 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. 572149
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