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In 1988, Pentair agreed to acquire FC Holdings Inc., the holding company for Federal Cartridge and Hoffman Engineering, for $175 million in cash and the assumption of debt. Pentair would not hold Federal Cartridge for a long time, but the purchase of Hoffman Engineering was the start of a prosperous era of enclosures manufacturing for Pentair.
The first commercially successful ink cartridge system for fountain pens was patented in 1890 by the Eagle Pencil Company, using glass cartridges. In the 1920s the John Hancock pen featured cartridges made from thin copper tubing. From the 1930s on, Waterman sold pens in France that used glass cartridges. Cartridge-filling pens only became ...
A setpoint can be any physical quantity or parameter that a control system seeks to regulate, such as temperature, pressure, flow rate, position, speed, or any other measurable attribute. In the context of PID controller, the setpoint represents the reference or goal for the controlled process variable.
The pressure-balanced shower valve compensates for changes in water pressure. It has a diaphragm or piston inside that reacts to relative changes in either hot or cold water pressure to maintain balanced pressure. As water pressure drops on one supply line, the valve reduces the pressure in the other supply line to match.