The Barton Model 224A Differential Pressure Unit (DPU) is a mechanical device that monitors the parallel differential pressure of a gas or liquid passing through a process system or the amount of liquid stored in a process tank. The DPU is connected to a primary device (e.g., venturi, orifice monitor, or stream pipe) in the factory-stream assessment method system. For liquid concentration readings, the DPU can be linked in a multitude of respects to evaluate the range of stress induced by fluid density differences in the unit ship.
The Barton Model 224A DPU is available in distinct stress results to assess specific ranges between 0-30 inches of water column and 0-1000 psi, with safe job stress (SWP) results of 500 to 10,000 psi (224A Non-C limited to 500 to 3,000 psi SWP). Table 1-1, paragraph 4. The 224AC Bellows Unit Assembly (BUA) is produced in three dimensions: 1-5/8 inch, 5/8 inch