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Flow Rate Question

What is flow rate?

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The flow rate in litres per minute (or litres/hour) is a very important measure of the cleaning ability. DIY machines commonly have flow rates as low as 6 litres/min. Heavy-duty industrial units vary from 10 to 40 litres a minute.

Posted on Aug 27, 2008

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Posted on Jan 02, 2017

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Flow rate of device below flow rate needed to turn on unit out in spite of screw adjustment


you are in the chainsaw catagory and you talk of flow rates screw adjustments
could you post again explaining exactly what the problem is and what it affects

Dec 20, 2016 | Garden

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2002 Nissan Frontier showing a P01444 code


P1444 EVAP Canister Purge Volume Control Solenoid Valve
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP canister is regulated as the air flow changes.

Feb 11, 2014 | Nissan Frontier Cars & Trucks

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What is a flow rate in aquarium water pumps?


A flow rate is the amount of gallons your water pump can push in an hour. Water pump should be able to push five times as many gallons as the of the tank. For example if you have a 20 gallons tank you'll need to use a water pump with a minimum of 100 gallons flow rate.

Aug 09, 2012 | Fish

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Hi iv got 2 dirtblaster lance both doesn't work but does in friends whats the problem


those rely on "flow-rate". The oriface is sized for a certain flow-rate so it may be that your washer does not produce enough flow -- but your friend's washer does. Flow-rate is typically measured in GPM or LPM. With most of the commercial makes (brand), you can buy a rebuild kit and size it smaller than the original, causing it to match your pressure washer's flow-rate. To do this, however, you would need a vender to figure out which make it is -- then, if he knows the flow-rate, he can reference the orifice size and sell you the proper rebuild kit. You can expect those to cost between $20 and $40, generally.
Don

Feb 28, 2012 | Garden

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Will the Grundfos RCP-96 model work with my Rinnai tankless heater model # C85e-1?


Grundfos RCP-96 has Flow range: 0 - 27.5 U.S. GPM
According to Amazon spec sheet:
http://www.amazon.com/Grundfos-RCP-96-UP515-55SFC-Recirculator-Timer/dp/B00128BJAO

Most tankless require .4 GPM to start burner and .25 GPM to maintain burner
Rinnai does not show C85e-1 so you will have to consult your manual to see minimum water flow requirement.
http://www.rinnai.us/tankless-water-heater/
Sample manual from Rainnai mentions 'minimum flow rate' several times but doesn't give specific number. Yet promotion blurb on page 1 says "Ultra operates at a lower minimum flow rate."
http://www.rinnai.us/documentation/downloads/U290-665x0200_Condensing_Manual_EN_FR_1-2010.pdf
Another rinnai manual mentions flow rate several times in troubleshoot section yet fails to define what that rate is:
http://www.rinnai.us/documentation/downloads/U287-1833_VB_Series_R75LSi_R94LSi_R98LSi_Manual_EN_FR_EN_FR.pdf

It might seem that tankless promoters are CTA by failing to mention specific flow rate numbers.
I think tankless promotion is a definite overachiever, and vague flow rate is one tiny example.
It proves the necessity of reading whole manual and asking questions before buying a tankless.
There's another factor to consider:
All performance numbers are based on new products in ideal circumstance, and not based on a 4 year old product located in your home.

Your flow rate may vary, especially over time, and especially if water in your area is not crystal clear, and you are not diligent with correct water softener and filter.
Many factors can affect flow rates: water pressure, number of elbows, clogs in the line, sediment, size of pipe, aireators, water-saving shower heads, local water conservation policies, water well pressure, MUD district pressure issues, your home located near end of a water main, etc.

Read tankless efficiency vrs water softener
http://waterheatertimer.org/Battelle_Final_Report.pdf
Image of tankless parts vrs tank parts
http://waterheatertimer.org/images/Compare-water-heater-parts.jpg
Bradford White tankless vrs tank side by side
Lime scale does not flush out of tankless
Tankless must have water conditions with less than 11 grains hardness
"Savings falls far short of a payback," 'without comparing service costs'
http://www.pmengineer.com/Articles/Cover_Story/8cf9e86f7c298010VgnVCM100000f932a8c0____
geno_3245_197.jpg Sediment clogs tankless pressure sensor without softener.

Dec 28, 2010 | Grundfos RCP-96 Recirculation Pump for...

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Just wondering what the flow rate is Aquaflo XP2 Spa Pump 2.5hp. Reason I want to know is I want to use the pump as a circulation pump for a pool. thanks


There is no way to know the flow rate of your installation beyond a guess ... I guess you are pumping about 95 GPM with a 2.5 hp motor ... a 2 HP moves about 75 to 80 GPM. A 1.5 moves about 60 to 80. There are lots of variables least of which are accessories in the line ... chlorinator ... heater ... filter and its cleanliness ... etc. Other vairables include pipe size ... distances water pumped, number of turns - fittings - restrictions, etc. To get a good idea of the flow rate (important to know when calculating 'turn over' rates) get and properly install a flow rate meter.

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Aug 28, 2010 | Aqua Flo Aquaflo Flo Master Xp2 Spa Pump...

1 Answer

How do i adjust the flow rate (zero piont


the flow rate is adjusted by the dial on the spreader the higher the number the bigger the flow opening will be.

Dec 14, 2009 | Scotts Lawn 73740 SPDY GREEN 3000 B/C S 3...

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When i turn on the cold water to adjust the temperature of water - the hot water turns completly off. I cannot turn on the cold water at all. It is either all hot water or all cold.


It might be a question of inadequate flow. All tankless water heaters have a minimum flow rate that must be met, typically .5-.9 gpm, before the heater will operate. In the summer time the incoming ground water temperature is higher, causing you to mix more cold water and less hot water to get a lukewarm temperature. This can reduce your flow rate near or below the minimum flow rate.
Here's a test for you, try running running a sink while taking your next shower. If the hot water remains mostly constant throughout, then your problem is with flow at the showerhead. The flow at a shower head can be reduced by buildup of scale and sediment. Also all showerheads have a flow restrictor that limits flow to 2.5gpm (some even less). Removing the restrictor will increase the showerhead flow rate as well.
Also look for any error code displayed on the digital read out of the heater. Some heaters will flash on their burner indicate light as well.

Aug 17, 2009 | Water Heaters

1 Answer

I have a stream of gases with known concentration and known flow rate to be capture in bottle of known volume. How can i have a guess calculations about the amount/volume of sample captured? khalil Ahmad


Your captured sample will be flow rate x time. Your bottle size is the upper limit of the amount you can capture (any more than that amount and the bottle will explode and you won't capture anything). You must allow for reduced flow rate as the pressure rises in the bottle.

Jun 29, 2009 | Wolfram Research Calculation Center

2 Answers

Increasing water flow rate


With a flat head screw head driver adjust the pump pressure. The screw is on the left side of the image below.

2_26_2013_8_04_49_pm.jpg

Sep 13, 2008 | Coffee Makers & Espresso Machines

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