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05-16-2015, 02:11 PM #1
New Mexico, USA
05-16-2015, 03:04 PM #2
It's a flow gauge.
I measures the water flow in gallons per minute.
When I worked at a defense plant right after high school where we made electron tubs for the military, the larger tubes used in battleships for their radar were water cooled - I tested them setting the gallons per minute for the cooling and the gallons per minute for the RF load, that with the temperatures of the two provided a measurement of the power output (around 5 megawatts output).
The ones I used were about 2 feet long and much larger in diameter.
Also ... ... that says "gpm" on the side of it.
Also ... looks like it is installed upside down, rather, with the flow in the wrong direction for the gauge. The water flow direction should be the direction the arrow is pointing.
Added with edit: Is the water flowing down or up in the photo? If "down", then the gauge would be installed in the correct orientation with the flow - that close-up does not show the piping to verify which way the water is flowing.
Some of those gauges are designed and intended to be installed vertically "up" only (all the ones I used were designed and intended to be installed vertically "up" - but that does not mean there are not others which are designed to be installed horizontally or vertically "down", just would be a different design as they would not be using 'gravity' for part of the resistance, they may use a spring (which weakens over time) or some other means to resist the flow and thus be able to reliably measure the flow.
Last edited by Jerry Peck; 05-16-2015 at 03:45 PM. Reason: added part "added with edit ... "
05-16-2015, 03:44 PM #3
Water was flowing down, so that part looks correct. Wonder why they would want a flow gauge on the hot water line? Who knows.
New Mexico, USA
05-16-2015, 03:47 PM #4
05-16-2015, 03:55 PM #5
This one has a spring inside of it, so it could be used in various orientations:
Hedland H621-010 EZ-View Flowmeter, Polysulfone, For Use With Water, 1.0 - 10 gpm Flow Range, 1" NPT Male: Science Lab Flowmeters: Amazon.com: Industrial & Scientific
Why someone would want a flowmeter there? I can only think that they were measuring the flow of various fixtures for whatever reason they wanted that information for????
The one in your photo does not measure very much flow, so if everything was being used, I can see that maxing out and not providing a reliable measurement.
05-18-2015, 04:12 AM #6
05-18-2015, 04:52 AM #7
My Brother in law has another solution to this problem - Small electric water heater on timer (push the button and you get 10 minutes of hot water (Electricity on the island is about $0.40 a KW - the girls thought it was so nice to have unlimited hot water they would take 2 hour showers when they were here.
I have also used these on large refrigeration systems to control the flow of refrigerant to the expansion valve
05-18-2015, 03:42 PM #8