Pumps

Archive for the ‘Pressure Pumps’ Category

IDROMAT 2, CALPEDA pressure control which is usually used in water pump.

Probably a "load cell" pressure sensor, which is a strain guage sensor fixed to a diaphram, one side attached to the pressure being sensed, the other open to natural air pressure. The more pressure on the diaphram, the more the strain guage deflects, changing its resistance, which is read by the electronics and interpreted to a pressure value which it acts on.

Oleg Systems Co. is a designer and manufacturer of industrial air scrubbing systems including wet dust / fume collectors. Air scrubbing equipment utilizing the principle of wet dust collecting is available in numerous designs utilizing a number of principles and featuring wide variation in effectiveness, initial cost, operating and maintenance expense, space, arrangements and material of construction.

Many industrial processes produce large quantities of gaseous or vaporized contaminants that must be separated from gas stream. Removal of these contaminants is usually achieved through absorption into a liquid or adsorption onto a solid medium. Incineration of the exhaust gas has also been successfully used for the removal of organic gases and vapors. Spray dry air scrubbers are used to absorb and neutralize acidic gaseous contaminants in hot industrial gas streams. They use an alkali spray to react with the acid gases to form a salt. The process heat evaporates the liquid, resulting in a dry particulate that is removed from the gas stream.

Typical industrial applications for spray dry scrubbers are:

* Control of hydrochloric acid (HCl) emissions from biological hazardous waste incinerators.
* Control of sulfuric acid and sulfur trioxide emissions from burning high-sulfur coal.
* Control of sulfur oxides, boric acid, and hydrogene fluoride (HF) gases from glass-melting furnaces.

Spray gas scrubbers conduct four operations:

1) atomization;
2) gas droplet mixing;
3) drying of liquid droplets;
4) removal and collection of a dry product.

These operations are carried out in a tower or a specially designed vessel. The atomizer must disperse a liquid containing an alkali compound that will react with acidic components of the gas stream. The liquid must be distributed uniformly within the dryer and mixed thoroughly with the hot gases in droplets of a size that will evaporate before striking a dryer surface.

In typical spray dryers used for acid gas control, the droplets have diameters from 50 to 200 microns. The larger droplets are of most concern because these might survive long enough to impinge on equipment surfaces. In general, a trade-off must be made between the largest amount of liquid that can be sprayed and the largest droplets that can be tolerated by the equipment.

An important aspect of spray dryer design and operation is the production and control of the gas flow patterns within the drying chamber. Because of the importnace of the flow patterns, spray scrubbers are usually classified on the basis of gas flow direction in the chamber relative to the spray:

- in Cocurrent Scrubber the liquid feed is sprayed with the flow of the hot gas;
- in Countercourent Scrubber the feed is sprayed against the flow of the gas;
- in Mixed Flow Scrubber there’s a combined cocurrent and countercurrent flow.

There are several types of atomizers. High-speed rotating disks achieve atomization through centrifugal motion. Nozzles are also frequently used - both centrifugal pressure nozzles and pnneumatic nozzles. In the centrifugal pressure nozzle, energy for atomization is supplied solely by the pressure of the feed fluid. In the two-fluid nozzles, air (or steam) supplies most of the energy required to atomize the liquid. As a result, two-fluid nozzle can produce very fine atomization, particularly with viscous materials.

Spray air scrubbers include metering valves, pumps and compressores, and controls to assure optimal chemical feed and temperature within gas-cleaning system.

For additional information please refer to http://www.olegsystems.com/blower/Index.html.

Oleg Chetchel
Engineer of Air Transfer Systems
Oleg Systems Co.
http://www.olegsystems.com/dustcollector/Index.html
http://www.olegsystems.com/airknife/Index.html

Oleg Chetchel
http://www.articlesbase.com/health-articles/scrubbers-of-spray-type-for-air-cleaning-676911.html

Suppose two pumps are connected in parallel and they both discharge in a single pipe, do their flow and pressure increase? Why? Please show answer with mathematical calculations.

It depends on the type of pumps. If they are positive displacement pumps then the flow will double and the discharge pressure will go up to over come the extra pressure drop caused by the increase in flow. This is because positive displacement pumps deliver the same flow rate regardless of the discharge pressure.

If the two pumps are centrifugal then the flow will increase but the flow will not double. This is because a centrifugal pump produces different amounts of flow depending on the discharge pressure. If you look at any centrifugal pump performance curve you can see this effect. At zero discharge pressure the flow is maximum and at maximum discharge pressure the flow is zero.

The down stream piping system has a pressure drop curve that varies with flow rate. The lower the flow rate the lower the pressure drop. The higher the flow rate the higher the pressure drop.

Two centrifugal pumps will produce a flow rate that balances their discharge pressure with the system pressure drop so the two are in equilibrium.

To demonstrate this mathematically takes more time than I have to give. If you do a web search I am sure you will find sites that address centrifugal pumps and system pressure drop curves.

if you just use it around home and it gas change oil once year l clean air filter yearly the presser pump has no maintenance on mine

The present pressure pump is 15 years old. We also have sulfur in our water.

the pipe to the home might be clogged a pump with more horsepower a bigger airator

What will be theoretical approach to calculate pressure at output of propeller block if pump motor is rotating at speed N rpm? like using maths and probably integration?what will be theory?

A pump does not create pressure, only flow, which is used to calculate resulting pressure from input power and output aperture cross section.

Power delivered to the pump is
P = 2 pi N T
N = Revs/sec
T = Torque in Newtons
P = Watts

Power delivered to the fluid is the volume flow times the pressure drop
P = (m^3/second) (Pa) = (m^3/sec)(N/m^2)
Pa = P/(volume flow)

http://www.eng.utoledo.edu/polymer/info/Courses/LabIHandouts/Pump%20Characteristics.pdf
http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=s&q=Using+RPM+to+calculate+pressure+at+pump+outlet&btnG=Search&aq=f&aqi=&aql=&oq=

.

Blood Pressure Disease, often called the silent killer; it is very common for a person to suffer from high blood-pressure without even knowing it. Blood pressure is actually the pressure of the blood against the walls of the arteries; and, is monitored by checking the pressure of the heart as it pumps blood to the rest of your body; and, the pressure between beats as the heart relaxes. Blood-pressure is usually categorized as either being high, low, or normal.

The initial symptoms of high blood pressure or hypertension are so mild that most people who associate them with other conditions or causes, do not notice them at all, or fail to take them seriously until there is a serious problem. The most common symptoms are nausea, fatigue, headaches, and dizziness. If left untreated, blood pressure disease can lead to more serious conditions, such as heart failure, heart attack, stroke, and kidney failure. Before we go further, we should note that abnormal blood pressure could be chronic and lead to the conditions mentioned. But, it can also be temporary and not cause any short term or long term problems. The most common causes of temporary high-blood-pressure include pregnancy, nervousness over a doctor’s visit, also called “white coat syndrome,” or birth control pills. Chronic high blood pressure has been linked to uncontrollable factors like age, race, and family history. As well as, factors, such as weight, sodium intake, and lack of exercise, that can be controlled. Some of the most effective ways to treat blood pressure disease revolve around lifestyle changes such as changing eating habits, increasing exercise, and managing stress. Yet, there are also medications that help lower high blood pressure. These typically include diuretics and beta-blockers.

On the opposite end of the spectrum is low blood-pressure, also called hypotension. Low blood pressure can cause a few more symptoms than high blood pressure. So, in addition to symptoms like dizziness and fatigue low-blood-pressure can also cause fainting, depression, and cold and/or clammy skin. Low blood pressure, if left untreated, can lead to serious health issues, such as shock. Shock is the term used to describe a rapid failing of vital organs that occurs without warning and is caused by long periods of low pressure of the blood. Persistent or serious low blood pressure is caused by serious conditions such as dehydration, blood loss, or a change in blood pressure medicine. Treatment for low-blood-pressure will depend largely on its cause.

Most people have normal blood pressure. Normal is when the body is healthy enough to maintain itself. The body has sensors that let it know whether it needs to adjust to combat a lower or higher blood pressure. In order to stay on top of blood pressure levels, it is important to have your blood-pressure checked routinely, and more often as you get older. Blood pressure monitors are easy to use and work by electronically displaying the rate at which the heart contracts over the rate at which it relaxes between beats. Blood pressure monitors for many people to identify high or low pressure.

Called the silent killer by many, blood pressure can cause serious conditions and lead to death if left untreated. So, it is important to understand the often overlooked initial symptoms of both hypertension and hypotension. High-blood-pressure has become more visible in recent years, and it is important for those at risk to check their blood pressure routinely make the necessary lifestyle changes.

Emeka Ezidiegwu
http://www.articlesbase.com/medicine-articles/blood-pressure-disease-the-silent-killer-675217.html

When it comes to purchasing a pressure washer the choices are much greater than one might think. Likely the most important choice that will help you to narrow down a good selection is whether you want an electric pressure washer or a gas pressure washer. How to buy a pressure washer from there might be a bit simpler. If you decide to go electric then you should be aware that they will be smaller, easier to maneuver, and much quieter. They also don’t require as much maintenance as gas powered machines do. Gas powered washers offer more power and do cost more.

For industrial purposes, a gas powered pressure washer will be the answer when the question is how to buy a pressure washer. One of the main other factors to consider is PSI which means per square inch. That is very important, especially in industrial usage. This is only an important and critical factor if you plan to clean large areas. Pressure washers are used daily by various commercial cleaning contractors. Commercial pressure washers are composed of industrial pumps, very heavy-duty components and motors. How to buy a pressure washer depends solely on the pressure washer application.

Pressure washers come in many various assortments and types. The standard styles are cold, hot, and steam pressure washers. You should be aware of how to buy a pressure washer before embarking on the journey. Cold water pressure washers are the standard for general cleaning jobs that do not require the strength that the others offer. If you generally will be removing such things as grease and oil then a pressure washer that emits hot water will work much better as their temperatures reach a high enough point where they have the capabilities to remove such debris.

The hot water systems are also much more effective for cleaning cars and trucks, places that have contact with food and preparation, and to clean construction equipment. The ultra high temperatures make all the difference when you are figuring out how to buy a pressure washer.

Steam clean pressure washers rely on propane, gasoline, or other types of heating oils to create wet steam. Dry steam only offers a small amount of the same pressure and does not have the flow to remove debris from most surfaces. Although dry steam still uses the PSI measurement, the best that they can stand up to is about 50PSI. There is also not much consistency at all with dry steam cleaners.

The application and pressure washing locations play a vital role in determining how to buy a pressure washer. If it will be used outdoors then there are general rules laid in place by the EPA that prohibit exactly how you will use your pressure washer. Simply allowing water flow and contamination to run down the storm drains will likely get you a hefty fine. For indoor use there may be standards in place by both the EPA and OSHA that have to be followed.

Ultimate Washer
http://www.articlesbase.com/strategic-planning-articles/how-to-buy-a-pressure-washer-736144.html