Yuken Kogyo Co., Ltd. RT-06-B-22 Relief Valve

The Yuken RT-06-B-22 Relief Valve from Yuken Kogyo Co., Ltd. is a direct-acting hydraulic relief valve designed to limit system pressure and provide overpressure protection in high-flow hydraulic circuits. It features NG16 / CETOP 7 (06 Size) mounting for subplate or manifold installations, making it suitable for hydraulic power units, heavy industrial presses, injection molding machines, and automated production equipment that require reliable pressure control. The valve has a hardened steel body and supports a maximum operating pressure up to 315 bar with a flow capacity up to approximately 120–160 L/min, depending on system conditions. It uses hydraulic oil (mineral-based fluids) and operates across a temperature range from -15°C to +70°C. The control type is direct acting, and the pressure adjustment range is model-specific and factory calibrated for RT-06-B-22, enabling precise setpoints for stable regulation and protection of pumps, actuators, and piping from pressure spikes. Common replacements or cross-references include RT-06-B-30, RBG-06-B-22, and Nachi R-G06-1-10, reflecting its compatibility within related Yuken and industry valve families.