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Charles
03-20-2006, 11:04 AM
What does "In Wg" stand for? It is being used on a pressure chart.

Robert Fogt
03-23-2006, 02:07 PM
in wg stands for inch water gauge, another name for the inch water column or just inch of water.

The gauge means its read from a gauge, which actually measures the difference between the pressure in the pipe and the pressure of the atmosphere.

Unregistered
05-29-2007, 11:12 AM
How do you convert 1 In Wg to kPa?

Robert Fogt
05-30-2007, 12:02 PM
How do you convert 1 In Wg to kPa?

You can find both those units on the Pressure conversion page.
http://www.onlineconversion.com/pressure.htm

1 inch of water [4 °C] = 0.249 088 908 kilopascal

Unregistered
04-21-2009, 02:52 PM
In wg is often used as a unit of pressure (inches of water) and is not a standard engineering unit of pressure. (Let's say that its a slang term, probably from the Navy) The standard engineering unit is inches of water (in H2O, in W or in WC for column of water).

Mrs X
04-22-2009, 03:38 PM
In wg is often used as a unit of pressure (inches of water) and is not a standard engineering unit of pressure. (Let's say that its a slang term, probably from the Navy) The standard engineering unit is inches of water (in H2O, in W or in WC for column of water).
Not where most people live. :eek:

JohnS
04-22-2009, 04:10 PM
True, and expressing the column height in millimeters won't help much either.

Water is cheap, but, at best, a poor man's reference standard with very modest accuracy when used as a standard for density, heat capacity, or pressure.

Columns of fluid really aren't very good pressure standards as they depend on the fluid density which varies with temperature (and pressure) and local gravity, which usually isn't "standard" gravity. It is a rough indicator.

Unregistered
10-11-2009, 08:21 AM
How do you convert 1 In Wg to kPa?

how much is 90 wg in bar

JohnS
10-11-2009, 10:50 AM
how much is 90 wg in bar

90 WHAT? Water gauge may use units of inches, feet, millimeters, centimeters, meters, etc. If it is really the height of a column of water, you need to know temperature and local gravity. The pressure is equal to rho*g*h, where rho is density, which depends on temperature, g is local (or standard) gravity, and h is height.

ferambiental
12-01-2009, 05:12 PM
You usually use "in wg" as a parameter to choose an equipment that need to work into tanks, so you will choose an equipment as minimum has a diferencial pressure as the depth of the tank.

Unregistered
10-24-2011, 01:37 PM
does W.G. relate to magnahelic? and what is the importance of knowing W.G. in an hvac system? to know when to change filters?

JohnS
10-25-2011, 03:10 AM
does W.G. relate to magnahelic? and what is the importance of knowing W.G. in an hvac system? to know when to change filters?

W. G. is water gauge. It is a means of approximately measuring pressure as the height of a column of water the pressure will support.

Unregistered
10-02-2012, 08:12 AM
Excuse please. But, water Is Thee standard for all weights and measures specifically because it is so uniform and consistant (as a chemical entity)! That does. not mean it does not. vary with other environmental factors. It does, like. ALL materials, but it is very consistent as a material once those factors are allowed for. And, BTW, manometers are self compensating. They show differnciially, so many of those factors you mention simply do not exist or are so small that they defy the accuracy of even the most expensive devices. They are often used despite they're inaccuracies for the sake of convenience. As a matter off fact most of these expensive meters are calibrated with tube manometers.

oficina de mantenimiento
10-29-2012, 09:06 AM
As one might calculate the capacity of a medical air compressor in cfm?

Robert Fogt
10-29-2012, 08:33 PM
As one might calculate the capacity of a medical air compressor in cfm?

The capacity would be the volume, usually stated in liters or gallons. CFM is the flow rate, in cubic feet per minute.

Not exactly sure what your question is.

Shock
03-05-2013, 06:35 PM
Please kindly help me to convert CFM to "WG.. Cubic Feet Meter (CFM)..

JohnS
03-06-2013, 04:34 AM
Please kindly help me to convert CFM to "WG.. Cubic Feet Meter (CFM)..

"WG" is water gauge, and an approximate measure of pressure based on column of water supported. This is no direct relation between pressure and flow; your car tire holds pressure only because there is no flow, flow makes it go flat.

Depending on the nature of a pipe, there is a relation between flow and differential pressure (pressure difference from one end to the other) but it is complicated and depends on details of the pipe and what is pumped through it.

Unregistered
03-25-2013, 10:16 PM
How do you convert 1 ft Wg to ft aq?

Please send the flowing convert on urgent