nothing, its just terminology why A pressure relief valve is a safety device to prevent over pressure in such things as compressor receivers. A pressure reducing valve drops the pressure to the requirements of the user or tool. Such as a demand valve on scuba gear.
About 7000 lbs Source: 30 seconds of google search
A bag of Quickcrete weighs 80 lbs dry. When water is added it can weigh another 1.5 to 2 lbs. when the water evaporates it will sill retain some water; so, about 80.5 lbs. The Quickcrete covers 1/2 cu ft. or 2 sq. ft. @ 3" thick. 21X20= 420 sq ft X 40.25= 16,905 lbs. or there abouts.
Does it float or does it not float? If it floats it is lense dense than water, 62.4 lbs/cubic ft. Wood is about 40 lbs/ cu.ft.--it floats. Concrete is 150 lbs. / cu.ft. -- it does not float.
Assume a small piston (one square inch area) applies a weight of 1 lbs. to a confined hydraulic fluid. That provides a pressure of 1 lbs. per square inch throughout the fluid. If another larger piston with an area of 10 square inches is in contact with the fluid, that piston will feel a force of 1 lbs/square inch x 10 square inches = 10 lbs. So we can apply 1 lbs. to the small piston and get 10 lbs.
If the height is 10' and the tank is full of water, you would have 4.33 lbs.
The pressure in your tank should be checked with water drained from the tank, with the water drained the air pressure in the tank should be set 2psi lower than your kick in pressure. So for a kick in pressure of 25psi the tank air pressure should be set at 23psi.Ans 2 - Water should NOT be totally drained from the tank or you may get a false reading ! - Leave 2-3 gallons in the tank. Most systems have the pressure switch set at 30 Psi, so tank residual pressure should be 28psi. - Lower than this gives really dismal pressure in the shower, especially if it's on second floor.
Check the pressure switch at the bottom of the tank by removing the gray cover and looking at the sticker on the underside. The right pressure is 2 lbs under the cut in pressure which is the lower of the two. For example, if the sticker says 30/50 then the right psi would be 28. If it says 40/60 then the right pressure would be 38. you need to first empty the tank completely of water before checking air pressure in the tank. then fill the tank to the right psi and then turn the water on to the tank.
Generally the pressure in the tank air bladder should be 2 psi below the water pressure switch kick in (pump turn on) point. In this example of 48 to 68 Lbs the air bladder pressure should be 46 psi. This pressure should be measured with the tank empty of water, that is to say NO water pressure applied. NEVER over pressurize the air bladder - it would be better to under pressurize if in doubt. Some tank manufacturers may recommend a different PSI differential so check with the tank literature or the manufacturer.
The water pressure at the bottom of a tank is determined by the weight of the water above it. Using the formula pressure = density x gravity x height, where density of water is about 62.4 lbs/ft3 and gravity is approximately 32.2 ft/s2, and the height of the tank is needed to calculate the pressure.
No!
No, it doesn't since water is all around the fish and puts pressure from everywhere just as air puts pressure on us everywhere. But if the fish is the floor then it would be heavier since there is no pressure.
A 100-gallon fish tank weighs approximately 834 pounds when filled with water. The weight of the tank itself can vary depending on the material it is made of, but the water alone would weigh around 8.35 pounds per gallon.
100 lbs of steam. The volume that the steam will occupy will depend on the pressure.
Depends Sometimes 10 lbs. and usually 50 lbs. sometimes up to 100 lbs.
Water weighs a little more than 8 lbs/gallon. The tank would weigh around 150 lbs. plus gravel, decor, etc. If the dresser is well-built and the tank is stable and level on it then it should be fine.
250 LBS plus the weight of the tank