![]() May be a considerable distance away in a centralized control room or remote building. The output signals are directed electrically to the indication instruments and process control devices. It is crucial to avoid placing the metering element near any bends or curves in the piping to ensure accurate measurements. ![]() This guarantees that the fluid flow experiences minimal turbulence before being measured. The usage and placement of flow-measuring devices require a minimum length of straight piping both upstream and downstream of the measurement point. The B&G model CB-1S is made with sweat connections, materials of construction that match those needed in this process, and the turndown required for a variety of potential throttling needs. This was a great lesson in asking the right questions and understanding the application in order to choose the best solution.Instrument Devices – Flow Measurement Use and Placement of Flow Measuring Devices How did I make sure the 1” circuit setter was the right size for the job? I used the B&G Electronic System Syzer and here is a video showing how I used it. Sizing the Bell & Gossett (B&G) Circuit Setter Using the Electronic System Syzer The particulate eliminated the automatic balance valve due to the smaller openings characteristic of this type of device.ĭue to materials of construction and pressure ratings, the Bell & Gossett Circuit Setter was the best choice in this application. The materials of construction and operating pressure/temperature required were simple enough. Turns out it is a water sampling tank with some particulate. These pumps are normally used in applications with polymers or oil-water-sand mixes. The pump being used was a progressive cavity pump (PCP). The engineer gave a piece of information I missed on the first read. That dropped the VFD option from my suggestions. The engineer advised that the process being used is a testing operation and it may run for a single ½ hour test, once a day. When the email came in, I thought about a process water system operating through the entire shift. Or, use a manual balancing flow meter valve such as the B&G circuit setter.ĭid I Mention How Often This Would Run and What it was Pumping?.Use an automatic flow limiting balance valve such as Griswold set at the 6.7 GPM.Use a variable frequency drive (VFD) to balance the pump and save the energy.I could think of multiple options to solve the question. We needed a valve with the ability to set the flow with a low pressure drop but also be able to possibly throttle 50% of the pump head depending on the type of process machine purchased later. The capacity was 6.7 GPM at 150 PSIG and the pipe was 1” copper. The pump model was used on an application where the actual pressure needed could vary depending on the brand of machine purchased. ![]() This seems like a simple question and solution, but this application had a twist and a very thorough engineer. We recently received an email from an engineer in Western Michigan concerning a low-flow, high-head pump process application and the proper balance valve specification.
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