A hydraulically operated, diaphragm-driven control valve controls tank filling and fluid levels according to a hydraulically controlled 3-way height guide, closing the valve at a preset high tank level and fully opening the valve three feet (m) when the level drops approximately. The Bermad 700 Series valves are hydraulic inclined globe valves with seat assembly and double chamber combination actuators that can be removed from the body as a single integral unit. The hydrodynamic body of the valve is designed for unobstructed flow paths and provides high flow capacity. The 700 Series operates under difficult operating conditions with low cavitation and noise. They are made of high quality materials suitable for different mining applications.