Pumps

Archive for November, 2009

Our heart is actually a system of two side-by-side pumps that circulate blood through two parallel loops of circulation. The right side of the heart pumps blood from the veins of the rest of the body to the lungs where it absorbs oxygen and eliminates carbon dioxide, and then returns to the heart.

This oxygen rich blood is then distributed to the rest of the body by the left side of the heart and the other loop.

Definitions:

Hypertension generally refers to elevated pressure in the loop serviced by the left side of the heart and is measured with a blood pressure cuff on our arm.

Pulmonary hypertension refers to increased pressure in the other loop of circulation and must be measured by other means (sensors within the heart or nearby vessels.)

Fen phen is the term used to describe the combination of two drugs, fenfluramine and phentermine.

The use of fen phen has been linked to two significant abnormalities, damage to heart valves (valvular heart disease) and PPH (Primary Pulmonary Hypertension).

Primary Pulmonary Hypertension (PPH), a disease that has been associated with the use of fen phen, involves thickening and constriction of the capillaries in the lungs.

Capillaries are the tiniest blood vessels that exist between arteries (the vessels that cary blood away from the heart to the body and lungs) and veins (the vessels that return blood from the body or lungs to the heart).

Capillary membranes (the walls of capillaries) are where nutrients enter our cells and where oxygen and carbon dioxide are exchanged.

This membrane becomes thickened and the tiny vessels (capillaries) constricted (tightened) as a consequence of exposure to fen phen. This causes an impaired exchange of gases and results in less than adequate supplies of oxygen to our cells and the sensation of difficult breathing. There is no cure for the damage to this membrane or the tiny blood vessels caused by fen phen.

The thickening and constriction seen with PPH (Primary Pulmonary Hypertension) also creates added resistance to blood flow in the lungs and hypertension (elevated pressure) in this loop of circulation. This is referred to as Pulmonary Hypertension.

Symptoms:

The primary symptoms of Primary Pulmonary Hypertension (PPH) are shortness of breath and dizziness. The increased pressure and resistance may cause stress on the heart and lead to enlargement of the heart and eventually an accumulation (build up) of fluid in the liver and other tissues, such as the legs. This is referred to as edema.

Primary Pulmonary Hypertension (PPH) refers to Pulmonary Hypertension that occurs in the absence of underlying heart or lung disease, or other illnesses.

Diagnosis:

This disorder, PPH (Primary Pulmonary Hypertension), can be diagnoses after abnormalities are found using a chest x-ray, high-resolution CAT (Computerized Axial Tomography) scanning, pulmonary function tests and an echocardiogram. An angiogram (right heart catheterization) confirms the diagnosis.

Nick Johnson
http://www.articlesbase.com/health-articles/symptoms-of-pph-related-to-fen-phen-94171.html

I can’t afford an electrician right now. I installed a new pressure switch but still no water. I really don’t believe my well is dry either.

Do you have power at the switch? Does the switch pass the power through to the motor leads? If you answer yes to each of these questions, then the problem is in the pump motor or the power leads going to it. Either way, the pump must be serviced. Call the pump service company to send an electrician. Many times, the problem can be fixed easily, other times it must be replaced. Call the qualified professionals to do the work.

I’m about a week into my cycle. Ammonia: 0.25ppm. Nitrites: 0.1 ppm.

Today my air pump stopped working. I know the cultivated bacteria is aerobic, and needs oxygen to survive. However, I can only get an air pump tomorrow afternoon.

If I leave my tank unaerated until then, how much damage do you think it will do?
Forgot to add: it’s a 5 gallon freshwater tank.

The air pump has little to no bearing on your cycle. Surface area provides O2. A power filter provides O2 by rippling the surface. The air pump bubbles don’t add air to the water. They do ripple the surface a little.
Unless running a filter, air pumps are purely decorative.

toilet start a load of clothes the pump will kick off. You can go to the pump house and move a stem sticking out of were the power hooks up and it will kick back on…please help!!!

the stem you are referring to is on the pump pressure sensor. you need to replace that unit.

A couple weeks ago, I had the gas pump goin’ as fast as it could, the handle held all the way up and propped by the little thingy. I looked at the screen when it was around the limit for my tank, but it never stopped pumping. It just kept shootin’ gasoline, and overflowed onto my hand and the ground. How is the machine able to detect when to stop pumping, and how might it have malfunctioned in my case? Thanks

In a gas pump handle you have two valves: the main valve, which is actuated by the oversize trigger you squeeze to make the gas flow, and the check valve, which lets gas flow out but won’t let anything back in again, thus reducing fire hazard. In the seat of the check valve you have a little hole.

To the backside of this hole is connected a Y-shaped tube.

One branch of this tube runs down the nozzle and exits at the tip while the other runs back to a diaphragm connected to a release mechanism on the main valve.

When you squeeze the gas pump trigger, gas running past the hole in the check valve sucks air out of the Y-shaped tube.

(This is because of the Bernoulli principle: a moving stream of fluid tends to pull things in from the sides. Take my word for it.)

As long the end of the Y-shaped tube exiting at the spout is unobstructed, air is simply pulled into the tube and nothing much else happens.

However, as soon as the gas in your car’s fill-up pipe gets high enough to cover the end of the tube, a partial vacuum is created therein, which yanks on the diaphragm, releases the main valve, and shuts off the gas.

If the gas happens to be especially foamy one day, it may actuate the release mechanism prematurely, with the result that you end up with less than a full tank of gas.

ok here is the situation, I have two 3000PSI pressure washer pumps, and a gas engine, If I took both and connected them to the motor, supplied enough water flow and used a coupler to join the output on both, will I get 6000psi of water pressure or will I end up creating back pressure and possibly damaging the pums, or will I get killed in the process.

I hope someone with an engeniering degree reads this, maybe I can get a valid answer. oh and forgive me for my spelling disaster here….he he he

You’ll get less than 3000psi. With the two pumps competing
for power from the motor you will get two inferior sprays
depending on how much power they take from the motor.