AMF Catalogue Hydraulic clamping systems Page 34
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pump unit pressure switch No. 6906 Pump unit pressure switch with pressure limiting valve and electric pressure switch, single and double acting, pressure monitoring in A and B, max. operating pressure 400 bar. ! NEW Article no. Clamping circuits 570180 6906-61811 1 570181 6906-62811 570182 570183 Order no. Valve type Matching control unit Electric control Pressure switch Weight 2,5 4/3 6906B-2-1 ● 2 72 2 2,5 4/3 6906B-3-2 4 76 6906-63811 3 2,5 4/3 6906B-4-3 6 80 6906-64811 4 2,5 4/3 6906B-5-4 8 84 Q [l/min] ● ● ● [Kg] Design: Compact, plug-in pump unit, ready for electric and hydraulic operation. Complete with: pressure limiting valve and pressure switch, solenoid valve, electric pressure switches, pressure gauge, float switch with temperature monitoring, oil fill, electrical control with main switch, indicator lamps and flange sockets. Electrical connection, complete with CEKON connector, pressure filter with filter mesh of 25 μm. Oil supply via threaded port. Includes 2 x 5 l hydraulic oil HLP32 supplied as standard. Application: These pump units are mainly used as drive and control elements for single- and double-acting clamping devices. Thanks to pressure monitoring, these units can be used in automation systems. Type of operation: Control panel for one to four clamping circuits. Features: The radial piston pump is driven via an alternating current standard motor to energy efficiency class IE3. The motor is protected against overload by a motor protection switch and a thermocouple. Pressure setting and pressure monitoring are accomplished via a pressure limiting valve and an electronic pressure switch. The value set at the pressure limiting valve is stored with the Mode button on the electronic pressure switch. This simultaneously sets the preprogrammed switch-off and switchback point. - High safety standard through the use of 4/3-directional seat valves! - External pressure monitoring of all pressure lines with up to 2 switching points possible. - No unwanted traversing movements. In the event of a loss of power or contact problems, the valve returns to the depressurise position. - Easy actuation by external machine controllers (e.g. PLC). The pump unit works in intermittent mode. In the event of a loss of pressure, the pump is subsequently automatically switched by the pressure switch. In the event of low oil level or an increase in oil temperature, the built-in floating switch with temperature monitoring switches the pump off and the fault lamp on the electrical controller comes on. Note: Ensure correct bleeding when connecting elements. In the event of a loss of pressure, subsequent pumping must not exceed a maximum of 2 times per minute. The pump unit must not run continuously. Options: clamping circuit: For up to 5 clamping circuits, there is an electrical controller. For more than 5 clamping circuits, there is no electrical controller. Valve combination: pressure reduction for all subsequent clamping circuits. Pressure filter with filter mesh of 10 µm or 40 µm. Throttle valves for specified clamping circuits. On request: Directional valves with other function diagrams on request. Five clamping circuits on request. Hydraulic diagrams: unclamp clamp position 0 unclamp coupling Energizing both valve magnets creates a switching position that links all 4 connections to each other. A depressurised state is created that allows easy coupling. clamp 4/3-directional seat valve for single and double-acting consumers Subject to technical alterations. 34 Hydraulic clamping systems ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de
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