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The machine tool division was sold to fellow Rockford company Bourn & Koch, who provides parts, service, and support for their machines to this day. Barber–Colman henceforth focused on cutting tools and process controls. The remaining divisions were eventually sold off. The Barber–Colman trademark is held by Eurotherm Controls, Inc.
Process duct pressure drops (US practice) are usually measured in inches of water. A typical duct operates at about - 25 inches (160 psf.) total suction pressure, with roughly 75% of the pressure loss in the bag house, and 10% of pressure lost in duct friction, and 15% (nominal)lost in elbow turbulence. A major consideration of duct design is ...
Duct leakage test in the US. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.
The squeeze-film pressure sensor is a type of MEMS resonant pressure sensor that operates by a thin membrane that compresses a thin film of gas at high frequency. Since the compressibility and stiffness of the gas film are pressure dependent, the resonance frequency of the squeeze-film pressure sensor is used as a measure of the gas pressure.
Figure 3. In the flat region, the sensor can be modeled as a voltage source in series with the sensor's capacitance or a charge source in parallel with the capacitance. Piezo sensors typically use the flat region of the frequency response (the "usable region" in Figure 1) between the high-pass cutoff and the resonant peak.
1987: Siebe plc acquires the Barber-Colman Company, an industrial automation and controls business. 1990: Siebe plc acquires the Foxboro Company, another industrial automation business. [2] [3] 1994: Siebe plc bought Triconex, a safety control business. [2] 1997: Siebe plc acquired APV plc.
A diffuser is "a device for reducing the velocity and increasing the static pressure of a fluid passing through a system”. [1] The fluid's static pressure rise as it passes through a duct is commonly referred to as pressure recovery. In contrast, a nozzle is used to increase the discharge velocity and lower the pressure of a fluid passing ...
Barber realized that the mixing and placing operations needed to be separated, and the mixing section became the line of Barber Greene asphalt plants and the placing section became the Barber Greene paver line. The early pavers used screw conveyors to distribute the mix in front of a screed that tamped the mix. This process meant that the ...