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The NBVP 16 seated valves are designed for clamping functions in machine tools, machining centers and energy efficient systems. The company has expanded the range of possible applications by designing several flow patterns for the cone-seated valves.  While typical 2/2, 3/2, 4/2 and four-way, three-position functions of directional valves can be fulfilled with either spool valves or seated valves, the seated valves offer many advantages, the company says, including elimination of the need for pumps to continually charge a hydraulic system; more tolerance of contamination in the system because of valve design and constant flushing; energy-saving intermittent service; and a reduction in the required volume of oil. Once the clamping pressure is reached, the valve is designed to safely maintain that pressure. The pump itself switches off or goes into circulation mode until the next clamping sequence, while the power units cool the system.  The company’s modular design system provides different types of 2/2, 3/2, 4/2 and 4/3 seated valves with NG6 or D03 standardized connection diagram. The maximum operation pressure is 5,800 psi, and the maximum flow 5.28 gpm. The available actuators are solenoid, hydraulic, pneumatic or manual, as well as an ATEX solenoid version for hazardous environments.
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