All About Valves

Archive for May, 2009

TOOLS

• Tape measure

• Pipe wrench

• Pry bar

• Utility knife

• Adjustable wrench

• Screwdriver

Materials

• Replacement Sink

• Replacement Faucet

• Sink Trap

• Tail piece

• Supply lines

• Silicone caulk or plumber’s putty

Teflon® tape

Understanding the sink & plumbing fixtures.

• This is a general schematic of a sink’s internal plumbing.

• Water is supplied through house plumbing, into the flexible tubes, and into the sink, where it is controlled by the faucet.

• Note: These shutoff valves should be turned off prior to performing any service on the sink!

• Note: If you do not have shutoff Valves supplying your sink, you will have to shut off the entire supply to the bathroom. This may involve a specific branch of the building’s plumbing, or it may involve the entire system. If you are unsure about this, seek advice from a knowledgeable source.

• You will know if the supply is shut off to the sink, when the faucets are turned to the “On” position. (Residual water may drain out of the faucet, but not water under any pressure.)

• The sink Trap will also need to be removed, and although this piece is not under pressure, there will be a small amount of water, which remains in this tube at all times (to prevent sewer gases from escaping into the bathroom area). Be prepared with a bucket to catch this water, when you disconnect this tube.

• Note: Disconnecting the sink is mainly a one-person job, although most sinks are made of heavy materials, and two people may be needed when physically removing the sink from the wall.

*(This is a Generalized image; specific fixtures may not have identical features.)

STEP 1 -Disconnecting the Existing Sink from the water supply.

• After closing the shutoff valves and/or the bathroom water supply, take the adjustable wrench, and loosen the flexible hoses, where they meet the shutoff valves.

• This requires a tight fit of the adjustable wrench, on the nut connected to the valve, and turning the nut to the left.

After both flexible tubes are disconnected from the shutoff valves, we can move on to

STEP 2 – Disconnecting the Existing Sink Drain.

• Removing the sink drain is a simple procedure. (This will [most likely] require the use of the pipe wrench, but in some cases, the connecting ring may be able to be loosened by hand.)

• If you require the pipe wrench to disconnect the trap, start with the vertical drain tube connectors first.

• The 2nd connector rings next.

• REMEMBER: There will be a small amount of water remaining in this tube, so be prepared.

Leave the drain tube, which enters the wall in place, you will be re-utilizing this when connecting the new sink.

Bathgems
http://www.articlesbase.com/business-articles/replacing-a-bathroom-sink-110368.html

Your heart is the organ that pumps the blood throughout your body. It is made up almost entirely of muscle and works nonstop as a blood pump right up until the moment you die. Anything that causes your heart to not function properly, is an immediate problem for the rest of your body. You just cant “tough it out” when it comes to heart disease, like you might be able to with other diseases.

The term heart disease, is a term that refers to a broad scope of ailments, that effect the heart and the job it has to do. They are all very serious, though some are more serious than others. Some are also more treatable than others. The following are some of the most common diseases of the heart but are not all of them.

Coronary heart disease, is a disease of the heart, that is caused by a build up of plaque, within the walls, that supply the heart, with the blood that it needs to survive. The heart also needs a blood supply to it, just like nay other organ, or muscle in your body and if the hearts blood supply is cut off to any part if it, this will cause a heart attack. A heart attack is when part of the heart dies, due to lack of blood flow to it.

Ischaemic heart disease is another disease of the heart, that is brought on by reduced blood supply to the heart. Unlike other muscles in your body, your heart can not ever take a rest, it works even while you sleep. So any interference with its blood supply is a serious threat to your life. Cardiovascular disease is a term that describes a number of diseases that affect the blood vessel system, as it pertains to your heart.

It is very difficult to have a disease of the blood vessels and not have it effect your heart also. The main blood vessels of your body run right through your heart. Your heart is interconnected with your blood vessel system. So almost any problem that affects your blood vessel system as a whole, is going to have some negative affect on your heart. This is not a blanket rule though and there are exceptions.

Cor pulmonale is a failure of the right side of the heart. Hereditary heart disease is any type of heart disease that you inherit through your families genes. This can be any one of a number of type of disorders of the heart muscle.Inflammatory heart disease is cause by the heart getting bigger than it should be. This might not seem like it would be too much of a problem but in actuality is life threatening.

Your heart is enclosed in a limited amount of space that it has to work in. When it becomes inflamed, or grows larger than it normally should be, it cant do its job as well as it should do it. This disease can also affect the tissue surrounding the heart.

Experiments have been done, involving a radical operation, that involves removing a section of the heart and then stitching it back together, to reduce its size, but research is still ongoing and the operation is still not approved for humans in the United States. It has been performed successfully in other countries though.

Valvular heart disease is a disease that affects the Valves of the heart. Heart valves must open and close properly for your heart to pump blood effectively. Damaged or malfunctioning heart valves, allow blood to leak by them, or if they aren’t opening properly, not enough blood to pass through them.

As pumps go, your heart is as complex as you can get. So remember to take care of it because unlike other organs in your body such as your kidneys or your eyes, you only have one.

Sven Ullmann
http://www.articlesbase.com/diseases-and-conditions-articles/heart-disease-131983.html

The Bourke engine was designed by Russell Bourke in the late 1930s, who endeavored to improve upon the Otto cycle engine. Despite finishing his redesign and building several working engines; bad luck (onset of World War II), bad health and a know-it-all attitude compounded to prevent his engine from ever coming to market despite its claimed advantages. Well into the 2000′s there are several small groups extolling the virtues of the design. The Bourke engine has two opposed cylinders with the pistons in a Scotch yoke mechanism. Because the motion of the pistons is a perfect sine wave with regards to time vs displacement the fuel burns in a smaller volume, and so burns hotter. The Bourke engine also has a looser coupling with the output shaft, preventing excess vibration. The intake Valves are replaced by ports, saving on parts.

It is thought that the design features that increase its efficiency, namely the detonation mode of combustion, may cause emission problems. The higher combustion temperatures combined with the increased cycle time around top dead center may lead to increased nitrogen oxide emissions. There have not been any verified nitrous oxide tests on running engines to verify the emission problem.

Design features

* Scotch yoke instead of connecting rods to translate motion to rotary motion

o Fewer (only 3) moving parts

o Smoother operation

o Longer percentage of cycle spent at top dead center and bottom-dead-center for more complete combustion and exhaust scavenging

* Two power strokes for every rotation from the opposed pistons instead of one every other rotation (4-stroke) resulting in nearly twice the power at a given engine speed

* Expanding gasses cause adiabatic cooling reaction as opposed to a drawn out combustion and heating reaction.

* Lean fuel/air mixture combined with the adiabatic cooling reaction resulting in zero unburnt hydrocarbons in the exhaust

* Sealed underside of the piston to isolate the fuel/air mixture from the crankcase

o Eliminate the need to mix oil with the fuel as with standard two-stroke engines

o Prevents the piston ring blow by from polluting the crankcase oil extending the life of the oil

Simplified explanation:

The Bourke engine should be considered a detonation or “explosion” engine because of the extremely fast burn time of the fuel air mixture.

The rising piston compresses the mixture heating it, because of the cool piston head and cylinder walls the mixture is not heated enough to start a burn. The piston “latches” at top dead center because of the action of the scotch yoke. Spark plug fires causing an explosive burn. All of fuel is burned completely because of explosive burn time. Sharp rise in pressure causes scotch yoke to “unlatch” piston. Piston moves down cylinder, expanding gases following piston cause cooling of piston and cylinder walls. Since all of fuel was burned during “latching” of piston no fuel is being burned at this time, no heat is being added, all expansion results in cooling. When piston reaches the bottom of the cylinder it again “latches” until “unlatched” by the explosion in the opposite cylinder. This gives time for scavenging of explosive gases and injection of fuel air mixture.

The mixture must be lean enough so that compression heating of the mixture does not cause it to ignite prior to the “latching”. If this occurs engine will not run, or will run rough. Mixture of the fuel must be in the “explosive” range for the engine to run correctly. Any fuel that is used that is mixed into its “explosive” range will work on this engine thus giving it multi-fuel capabilities.

The maximum pressure on the piston occurs right after the release of the piston from top dead center. It is not spread over the whole length of the piston travel as in a conventional engine. For this reason this is an extremely high torque engine.

The complete burn of the fuel while the piston is “latched” gives this engine its high efficiency and low emissions.

The cooling caused by the expanding gases, behind the piston head and the non burning of fuel while piston is traveling, causes the low temperature exhaust gases. This also prevents dieseling during the next compression cycle, because of the cooling of the piston head.

Air enters under the piston head, where it is compressed (turbocharging). It then leaves from under the piston and is mixed with fuel, prior to being injected above the piston. This injection occurs at the same time, but at the other side of the cylinder port, that the exhaust gasses leave. Because of the shape of the piston the injected mixture hitting the sloped piston head cause a swirling action that leads to complete mixing of fuel/air. This mixing contributes to the complete explosive burn. The sloped piston head effectively separate the incoming mixture from the scavaging of the exhaust gases.

Piston is connected to the Scottish yoke through a “triple slipper bearing”. This bearing absorbs and smooths out the force from the explosive burn preventing deformation/breaking of engine parts. The bearing also absorbs any lateral forces, preventing vibrations. This bearing is the “key” to the engine. Without this bearing the explosive forces would “tear the engine apart”.

Compression ratio needs to be adjusted for type of fuel burnt. If compression ratio is to high speed control becomes erratic do to dieseling. Adjusting the compression ratio allows burning of both low and high octane fuels.

Piston shape, with higher volume around edges, contributes to complete explosive burn.

zee001
http://www.articlesbase.com/automotive-articles/bourke-engine-108226.html

A tracheostomy is a type of surgery used in the treatment of sleep apnea. It is a serious treatment, used as a last resort for people who either haven’t had success with any other types of treatment or whose sleep apnea is severe enough to be life-threatening.

This surgery has a high success rate but it can have some serious side effects. It involves an incision being cut in the throat, through the windpipe, roughly the size of a quarter. A tube is inserted into this incision to allow easier airflow in and out of the lungs. It can lead to other health problems, both medical and psychological.

The tube that is inserted allows the air to flow freely, eliminating the sleep apnea. During the day, a valve lets the patient shut the tube to allow them to breathe and speak naturally. The valve is opened at night while asleep to allow the air to flow.

Recovery from a tracheostomy can vary – some people will take longer than others.

There are multiple risks associated with this type of surgery. Scar tissue can form where the incision is made which can lead to changes in the appearance of the person’s neck.

Infections can sometimes develop where the incision is made, leading to swelling, redness and fluid drainage. Bleeding is also often a complication.

Some patients who have undergone this surgical procedure have difficulties with speech. Some have problems immediately after the surgery but show improvement with time while others have a permanent change in their speech.

A tracheostomy can also increase the chances of a lung infection.

Psychological and emotional problems can also be an issue for some patients who undergo the surgery. Self-consciousness can be an issue in some cases due to the appearance of the neck when the tube has been inserted.

After undergoing a tracheostomy, proper hygiene is very important. Keeping the neck clean and free of debris is paramount.

Rudy Watkins
http://www.articlesbase.com/medicine-articles/tracheostomy-surgery-for-sleep-apnea-sufferers-111340.html

Leak testing of a Solenoid Valve showing pressure increase.

Duration : 0:5:26

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Video showing in detail how the marshmallow cannon valve compares other designs on the internet. The fun videos are of marshmallows and apples hitting stuff. This video replaces the earlier one where youtube didn’t recognize it as a wide screen video. I improved the graphics as the old one was difficult to see. This video is produced as a technical commentary for The Marshmallow Launcher in the forum on www.crazybuilders.com.

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Duration : 0:7:20

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Learn tips on how to install a ball valve in this free video.

Expert: Jon Olson
Bio: Jon Olson currently teaches multiple industrial technology classes at the high school level. In addition, he has worked in residential construction for several years.
Filmmaker: Jon Olson

Duration : 0:1:6

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This is a demonstration video, on how to oil the valves on your trumpet. This video was brought to you by WorldWideInstruments.com

Duration : 0:1:20

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Please activate annotations.

Here are three high-res screenshots:

http://i26.tinypic.com/acwql1.jpg

http://i28.tinypic.com/ajnn7b.jpg

http://i25.tinypic.com/2gvoig9.jpg

Newer version with refraction:

http://i37.tinypic.com/9pxb1j.jpg

NEW! See it in action here:
http://www.youtube.com/watch?v=m0p8TtbdxD8

Duration : 0:4:0

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This is a vintage VW training film recorded directly from the original filmstrip and record. It describes how to adjust the Valves. Part 1 of 2

Visit our website at http://www.volksfolks.org/ for more videos.

Duration : 0:8:54

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