VT-VRPA1-50-12

The VT-VRPA1-50-12 electric analog amplifier from Bosch Rexroth Indramat is a high-precision control device within the VT-VRPA Electric Amplifiers series, engineered for demanding electro-hydraulic applications. This amplifier features a Valve Type of proportional control/relief valve configuration, delivering a Maximum Working Pressure of 6000 psi and a Rated Control Voltage of 12 VDC. Designed around a Nominal Size flow coefficient of 50, the unit ensures consistent performance across diverse load conditions. Its robust Seal Materials—an elastomer/PTFE combination—provide exceptional durability and leak resistance in harsh environments. The compact form factor and compatibility with standard industrial architectures make it an ideal choice for modern industrial automation systems.

With a sophisticated Actuation Method based on electro-hydraulic control, the VT-VRPA1-50-12 offers a finely tuned Flow Characteristic exhibiting a controlled linear response throughout its operating range. The amplifier’s Port Interface supports 3–32 mm connections, enabling seamless integration with multiple valve bodies. Its Dimensional Code Detail accurately indicates internal valve geometry for precise troubleshooting and maintenance, while the Operating Temperature Range spans from –54 °C to 538 °C to ensure reliability under extreme thermal conditions. The versatile Mounting/Connection options allow for both threaded or flanged attachment, simplifying installation in compact or retrofit scenarios. This level of technical specification empowers engineers to achieve repeatable, high-performance actuation in critical processes.

Operationally, the VT-VRPA1-50-12 incorporates an adjustable ramp function that can be fine-tuned via onboard jumpers or an external potentiometer adjustment, providing smooth acceleration and deceleration of the control output. Its built-in reverse polarity protection safeguards the device against wiring errors, and a dedicated 2.5 A T fuse protects the power supply circuitry, ensuring continuous uptime. The amplifier includes electrical position feedback through integrated measurement sockets, facilitating closed-loop control and rapid fault detection. A biasing current of 550 mA establishes a stable zero point, adjustable between –5 % and +30 % to match specific valve characteristics. These features combine to deliver robust performance with minimal tuning effort, reducing commissioning time and enhancing process stability.

Seamless integration into industrial automation architectures is supported by the amplifier’s compatibility with standard PLC and CNC controller interfaces, allowing direct communication in both centralized and distributed control networks. The unit’s design accommodates varying system layouts via its selectable threaded or flanged mounting, while maintaining reliable performance thanks to the high-integrity elastomer/PTFE seals. In applications ranging from metal forming and injection molding to mobile hydraulics and energy management, the VT-VRPA1-50-12 excels at precise pressure and flow control. Its combination of advanced technical capabilities and flexible integration options makes it an indispensable component for engineers designing next-generation electro-hydraulic systems.