The Parker RU101S30C is a high-performance, pilot-operated, balanced piston relief valve designed for precise pressure control in hydraulic systems. As part of Parker’s R-series, this valve is engineered to limit system pressure by diverting excess flow to the tank. Its balanced piston design ensures stable and consistent pressure regulation, even with varying back pressures at the tank port. The ventable feature allows for remote pressure control or unloading of the pump. Constructed with a durable steel body and equipped with NBR seals for compatibility with mineral-based hydraulic fluids, the RU101S30C is ideal for a wide range of industrial applications requiring reliable and accurate pressure limiting.