B 830 303 442

The B 830 303 442 universal card, part of the VT-UK2 Universal Cards series by Bosch Rexroth Indramat, delivers robust hydraulic control with a nominal flow of 21 GPM (80 l/min) and a maximum working pressure at port P of 4570 PSI (315 bar). Engineered for demanding industrial automation applications, it supports a broad pressure medium temperature range of -4° to 176°F (-20° to +80°C). The card is rated for a 100% duty cycle, enabling continuous operation without rest periods and reducing downtime. This component features an IP 65 degree of protection, ensuring complete dust ingress prevention and resistance to water jets in compliance with DIN 40 050 and IEC 144 34/5. The compact design accommodates a power consumption max of 50 W, balancing performance with energy efficiency.

Performance characteristics of the B 830 303 442 are defined by precise electrical and hydraulic control parameters. The solenoid current max of 3.7 A and a coil resistance R20 of 2.5 Ω deliver responsive actuation, while a response time (100% signal change) of 25 ms ensures rapid switching. Tight control is maintained through hysteresis ≤ 0.3%, providing repeatable valve positioning. The card handles return lines with a max working pressure at port T of ≤ 29 PSI (2 bar) and includes a position transducer connector with special connector for high-resolution feedback. Flow direction is clearly indicated per the integrated symbol, simplifying installation and service. These features combine to yield smooth, accurate hydraulic modulation even under rapid cycle conditions.

Designed for integration into complex hydraulic networks, the B 830 303 442 accepts fluids across a wide viscosity spectrum, from a recommended viscosity of 100–465 SUS (20–100 cSt) up to a max permitted viscosity of 60–3700 SUS (10–800 cSt). Its IP 65 protection rating and 100% duty cycle enhance durability in harsh environments such as machine tools, mobile hydraulics, and process automation. The card’s standardized mounting and electrical interfaces facilitate seamless pairing with Bosch Rexroth valve manifolds and control electronics. In demanding industrial settings, this universal card ensures reliable, long-term operation and precise fluid control, supporting applications where consistent performance and minimal maintenance are critical.