Perhaps the competitor quoeted an smaller pump.
So probably pump will be working at the extreme right of the curve.
Perhaps you quoted a bigger pump, and pump is running at the extreme left of the pump.
I agree with TenPenny.
If you pump from the well to a booster tank, Potable water will be renewed every time a truck is filled.
If there is enough space, you can pump from the well to an elevated tank, and fill the trucks by gravity. This way you will save a pump.
If the elevated tank is big...
We are working in the HVAC desing for an electric room, built over a Tunnel.
Tunel is underground, in intended to be the way out of the electric wiring coming out of the MCCs (located at the electric room).
Room has forced ventilation from the outside.
We try to keep tunnel temperature at...
We are working in a HVAC project for several buildings located in Guatemala.
Humidity in the area is extreamly high: up to 80%.
So, latent heat is almost as high as sensible heat, and we are having problems for selecting the equipment. Beside AC loads are higher than I'm use to.
Do anybody...
Do anybody knows an Air-Vacuum Relief Valve that can work in a slurry pipe?
We have a 8"ø HDPE Pipe, with 450 gpm of slurry 45%-50% solids.
Pipe trajectory has being carefully traced, so we only have one high point, and no low points, and pumps motors have a VFD.
I belive we don't need an AVR...
I'm looking for advise in order to select proper equipment for AC in a eletrical room.
I requiere about 48,000 BTU/H of cooling capacity, and I wonder,
Should I use a single AC unit? Or it is better to have 2 x 24,000 BTUH units?
I'm worry that if an AC unit fails, or needs maitenance, room...
I'd advise to fusion HDPE instead of campling it. It's more relieble.
HDPE is non conductive, so static may stay on HDPE pipes. And static is very dangerous when using a flammable fluid, specially if pipe is not full and some vapour may run throught it.
You'll need to ground fluid every some...
If you don't require an accurate metering flow, and you have plant air near, I'll agree that a pneumatic diaphragm pump may be the best options, as these are very low cost, and very small on size and weight.
Smallest pump I know has 1/4" NPT connections and fits on a 6"x6"x6" box, and can flow...
You can forget about flanges. Yamada, Graco, and very other manufacturers have 1/4" ,3/8" & 1/2" ø NPT air operated diaphragm pumps, that can handle very low flow, and several fluids.
However, lets remember that this kind of pumps doesn't give you an uniform flow, but pulses of high-low flow...
I agree with Mark, it is importan to consider what are we moving through the pipe.
e.g. if we are pumping water with sand, it isn't good idea to flow with very high velocity, because it might corrode the pipe (and very fast), but, we don't want it to flow to slow, because sand can settle and...
Is this for estimating?
In the caterpillar performance book, edition 38 for the trucks you are talking about, chapter 20 there is a section for estimating cost.
Truck 789C
Low load:70.6-105.9 liters per hour
Medium load : 105.9-141.2 lph
High load: 141.2-176.5 lph
Truck 793D
Low...
Usually, (as far as I know) these pumps have the option of adding a foot valve, which is basicly a strainer and a check valve in the suction of the pump, so pumps can be self-priming.
I'm looking to buy a new dessicant type air dryer for a very cold area, and I wonder, when is an area too cold?
When do I need a heater for the regeneration of the air dryer and how much can I stand without the heater?
I'm wondering, if I need a pressure relief valve, for an aplication where I transfer oil from a tank to another.
I'm planning to use a graco air operated piston pump, with a 4:1 relation.
Cutsheets from graco don't shown a pressure relief valve, but I was recommended to use it. How ever, I...
