Centrifugal pump is a kind of machinery used for pumping water through the
centrifugal movement, which is composed of pump casing, impeller, shaft, pump frame and other components. The pump should be filled with water before starting it, then the impeller can whirl the water in the pump at high speed, which will drive the water make centrifugal movement , and at the same time throw out the water and is pressed into the pipes. After the water being thrown out, he pressure will decrease near the impeller, which cause a low pressure area from around the shaft.
The pressure formed here is lower than the atmosphere pressure, so the water outside can rush to open the bottom valve and flow into the pump through the inlet. However, the water that has flown into pump will be thrown out again with whirling impeller and pressed into outlet pipe. As long as the impeller can be driven at high speed by power, the water will be pumped from the lower area to the high area continuously.
Comparing with other pumps, centrifugal pump has many distinctive advantages: High speed, small size, light weight, high efficiency, high traffic flow, simple
structure, stable performance, easy operation and maintenance; The only one
disadvantage of the pump is that the liquid must be filled with pump before starting it.
After finding out its working principles and features, the next step is to know how to operate it. There are some important points that you should keep in your mind when operating it: prohibit running without water and don't reduce flow rate by adjusting inlet; Do not use too much lubricant; Keep maintenances on it every six months.
Tuesday 16 November 2010
Monday 15 November 2010
Some Useful Tips about How to Maintain Water Pumps
It is necessary for you know how to maintain pumps to prolong their lives. Here some useful tips that you need to keep in your mind to make them work well.
1.Making general inspection on water pumps one time a week, which is done by the professional staff s who is responsible of checking pumps. What is more important, doing a comprehensive maintenance every six months.
2.Spending at least 5 minutes in conducting a trial operation especially on the fire pumps, spray pumps, fill pumps every 15 days. In addition, a comprehensive maintenance is needed.
3.Conducting a comprehensive maintenance on sewage pumps every six months.
4.Paying more attention to the pumps, valves, pressure gauges, pipes when maintaining pumps.
5.Checking the seal carefully. Replace or increase the seal once a leakage is found.
6.Replacing the oil with impurities timely.
7.Making sure that the pumps are undamaged, with intact nameplate and clear flow directions.
8.Tightening base screws and make some antirust measures.
9.Keeping the appearance neat, nameplate intact, and perfect connection with ground.
10. Keeping the one-way valve flexible and make sure that there is no leakage both inside and outside the body.
11. Keeping pressure gauge accurate and dial clear.
12. The switch on every valve should be flexible and reliable; what is more, no leakage outside.
13. Cleaning and checking the impeller carefully, replace it if it is damaged.
14.Checking the sumps and supplement the oil to the appropriate location if lack of oil.
In fact, as a user, it is impossible to deal with all problems due to the limitations of professional knowledge. Therefore, you had better to ask the old users who have rich experience in using pumps. The best way is to buy the reliable and high quality pumps in order to avoid meeting with troubles as less as possible.
1.Making general inspection on water pumps one time a week, which is done by the professional staff s who is responsible of checking pumps. What is more important, doing a comprehensive maintenance every six months.
2.Spending at least 5 minutes in conducting a trial operation especially on the fire pumps, spray pumps, fill pumps every 15 days. In addition, a comprehensive maintenance is needed.
3.Conducting a comprehensive maintenance on sewage pumps every six months.
4.Paying more attention to the pumps, valves, pressure gauges, pipes when maintaining pumps.
5.Checking the seal carefully. Replace or increase the seal once a leakage is found.
6.Replacing the oil with impurities timely.
7.Making sure that the pumps are undamaged, with intact nameplate and clear flow directions.
8.Tightening base screws and make some antirust measures.
9.Keeping the appearance neat, nameplate intact, and perfect connection with ground.
10. Keeping the one-way valve flexible and make sure that there is no leakage both inside and outside the body.
11. Keeping pressure gauge accurate and dial clear.
12. The switch on every valve should be flexible and reliable; what is more, no leakage outside.
13. Cleaning and checking the impeller carefully, replace it if it is damaged.
14.Checking the sumps and supplement the oil to the appropriate location if lack of oil.
In fact, as a user, it is impossible to deal with all problems due to the limitations of professional knowledge. Therefore, you had better to ask the old users who have rich experience in using pumps. The best way is to buy the reliable and high quality pumps in order to avoid meeting with troubles as less as possible.
The Ways to Purchase Agricultural Pumps
It is very important to choose agricultural pumps that can suit local circumstances. There are 3 common types of agricultural water pumps, including centrifugal, axial and mixed-flow pump.
Centrifugal pump with higher head pressure but less flow rate, is more suitable for
mountain and irrigation areas; axial pump with higher flow rate but less head pressure, is better for plain areas; but the head pressure and flow rate of mixed-flow pump are between the centrifugal and axial pumps, so it can be used in plains and hilly areas. Whatever kind of pump you really need, choose according to the local conditions, water sources and pumping height.
In addition, taking its economic performance into account is very important, too. You must pay particular attention to the pump head and flow when choosing pump. Another point should be noted that there may be a difference between the pump head on nameplate and the pumping head(the actual head), because some pressure may lost when water flow near through the pipes. That is the reason why the actual head is generally lower (10%—20%) than the total head.
Therefore, in order to guarantee that the pumps can be started quickly and used safely, choosing the pumps with higher head than one on the nameplate is more appropriate; If having had power machine, it will be better to choose the pumps that can match its power.
Centrifugal pump with higher head pressure but less flow rate, is more suitable for
mountain and irrigation areas; axial pump with higher flow rate but less head pressure, is better for plain areas; but the head pressure and flow rate of mixed-flow pump are between the centrifugal and axial pumps, so it can be used in plains and hilly areas. Whatever kind of pump you really need, choose according to the local conditions, water sources and pumping height.
In addition, taking its economic performance into account is very important, too. You must pay particular attention to the pump head and flow when choosing pump. Another point should be noted that there may be a difference between the pump head on nameplate and the pumping head(the actual head), because some pressure may lost when water flow near through the pipes. That is the reason why the actual head is generally lower (10%—20%) than the total head.
Therefore, in order to guarantee that the pumps can be started quickly and used safely, choosing the pumps with higher head than one on the nameplate is more appropriate; If having had power machine, it will be better to choose the pumps that can match its power.
Friday 12 November 2010
Visit the Most Beautiful Places in China
China, as a country with more than thousands of histories, is attracting more and more tourists' attention in the world. Have you dreamed of visiting the beautiful and civilized country with your lovers? Here are the most impressive night places in China that you need to visit:
1. The most beautiful place- Wuzhen, located in Zhejiang Province. The white walls, gray tiles,stone road, small boats,wood carving, pavilion, tea houses make the town look very quiet picturesque and peaceful.
2.Paradise-Lijiang old town, located in Yunnan province, South of China, it a natural, mysterious, quiet and original place.
3.Wuyuan-located in Jiangxi province, the hometown of tea. It is a famous eco-tourism county where is regarded as "the most beautiful village in China"
4.Fenghuang City-Located in western Hunan Province. A red stone street, a tremendous old castle,a magnificent old stone bridge,a group of world-famous people, everything here make the old city look very elegant and charming.
5.Jiu Zhaigou- a heaven on the earth. It is pure place where is famous with the beautiful landscape. The blooming flowers in spring, blue sky in autumn, and flying snow in winter bring you into a dreaming word. It seems that you can forget all sadness and anxieties in the world.
6.The first village in west China- Burqin White Haba Village. The white birch trees dotted in the village,the old wooden houses, and the shepherd boy release a unique warmth of life.
1. The most beautiful place- Wuzhen, located in Zhejiang Province. The white walls, gray tiles,stone road, small boats,wood carving, pavilion, tea houses make the town look very quiet picturesque and peaceful.
2.Paradise-Lijiang old town, located in Yunnan province, South of China, it a natural, mysterious, quiet and original place.
3.Wuyuan-located in Jiangxi province, the hometown of tea. It is a famous eco-tourism county where is regarded as "the most beautiful village in China"
4.Fenghuang City-Located in western Hunan Province. A red stone street, a tremendous old castle,a magnificent old stone bridge,a group of world-famous people, everything here make the old city look very elegant and charming.
5.Jiu Zhaigou- a heaven on the earth. It is pure place where is famous with the beautiful landscape. The blooming flowers in spring, blue sky in autumn, and flying snow in winter bring you into a dreaming word. It seems that you can forget all sadness and anxieties in the world.
6.The first village in west China- Burqin White Haba Village. The white birch trees dotted in the village,the old wooden houses, and the shepherd boy release a unique warmth of life.
Wednesday 10 November 2010
Some Useful Tips about How to Maintain Water Pumps
It is necessary for you know how to maintain pumps to prolong their lives. Here some useful tips that you need to keep in your mind to make them work well.
1.Making general inspection on water pumps one time a week, which is done by the professional staff s who is responsible of checking pumps. What is more important, doing a comprehensive maintenance every six months.
2.Spending at least 5 minutes in conducting a trial operation especially on the fire pumps, spray pumps, fill pumps every 15 days. In addition, a comprehensive maintenance is needed.
3.Conducting a comprehensive maintenance on sewage pumps every six months.
4.Paying more attention to the pumps, valves, pressure gauges, pipes when maintaining pumps.
5.Checking the seal carefully. Replace or increase the seal once a leakage is found.
6.Replacing the oil with impurities timely.
7.Making sure that the pumps are undamaged, with intact nameplate and clear flow directions.
8.Tightening base screws and make some antirust measures.
9.Keeping the appearance neat, nameplate intact, and perfect connection with ground.
10. Keeping the one-way valve flexible and make sure that there is no leakage both inside and outside the body.
11. Keeping pressure gauge accurate and dial clear.
12. The switch on every valve should be flexible and reliable; what is more, no leakage outside.
13. Cleaning and checking the impeller carefully, replace it if it is damaged.
14.Checking the sumps and supplement the oil to the appropriate location if lack of oil.
In fact, as a user, it is impossible to deal with all problems due to the limitations of professional knowledge. Therefore, you had better to ask the old users who have rich experience in using pumps. The best way is to buy the reliable and high quality pumps in order to avoid meeting with troubles as less as possible.
1.Making general inspection on water pumps one time a week, which is done by the professional staff s who is responsible of checking pumps. What is more important, doing a comprehensive maintenance every six months.
2.Spending at least 5 minutes in conducting a trial operation especially on the fire pumps, spray pumps, fill pumps every 15 days. In addition, a comprehensive maintenance is needed.
3.Conducting a comprehensive maintenance on sewage pumps every six months.
4.Paying more attention to the pumps, valves, pressure gauges, pipes when maintaining pumps.
5.Checking the seal carefully. Replace or increase the seal once a leakage is found.
6.Replacing the oil with impurities timely.
7.Making sure that the pumps are undamaged, with intact nameplate and clear flow directions.
8.Tightening base screws and make some antirust measures.
9.Keeping the appearance neat, nameplate intact, and perfect connection with ground.
10. Keeping the one-way valve flexible and make sure that there is no leakage both inside and outside the body.
11. Keeping pressure gauge accurate and dial clear.
12. The switch on every valve should be flexible and reliable; what is more, no leakage outside.
13. Cleaning and checking the impeller carefully, replace it if it is damaged.
14.Checking the sumps and supplement the oil to the appropriate location if lack of oil.
In fact, as a user, it is impossible to deal with all problems due to the limitations of professional knowledge. Therefore, you had better to ask the old users who have rich experience in using pumps. The best way is to buy the reliable and high quality pumps in order to avoid meeting with troubles as less as possible.
Happy Single's Day
Tomorrow will single day! I am really happy that I have get rid of the boring and funny day because I have find my true love. I will never miss the day at any time.
We must face many great pressure from work and life, so we can't help complaining a lot. I hope that he can love me forever just I love him, I am willing to do anything for him as long as he feel happy. Life is so boring? hard?
We are born to bear pains. It seems that we can't find any way to escape from the ordinary life, because we are all human beings.
Wish every one happy in Single's Day and find their lovers in life.
We must face many great pressure from work and life, so we can't help complaining a lot. I hope that he can love me forever just I love him, I am willing to do anything for him as long as he feel happy. Life is so boring? hard?
We are born to bear pains. It seems that we can't find any way to escape from the ordinary life, because we are all human beings.
Wish every one happy in Single's Day and find their lovers in life.
Monday 8 November 2010
The anattached head to 'love supermarket' in China
Millions of singletons were being encouraged to pay $15 to submit photos of themselves - along with their vital statistics, age, salary, profession and hometown - to be viewed by people shopping for a partner.
Clients are even required to produce official documents to support their claims.
“This way, we are superior to online dating agencies, where people put up false information, " said Gao Shan, the love supermarket's company secretary.
Singles Day, known as Guang Gun, was first observed by university students in the 1990s, who chose the date because of its four lonely figures, 11/11. The annual event is now a multimillion-dollar industry.
Over the past five years, the number of one-person households in China rose by 29 percent.
Clients are even required to produce official documents to support their claims.
“This way, we are superior to online dating agencies, where people put up false information, " said Gao Shan, the love supermarket's company secretary.
Singles Day, known as Guang Gun, was first observed by university students in the 1990s, who chose the date because of its four lonely figures, 11/11. The annual event is now a multimillion-dollar industry.
Over the past five years, the number of one-person households in China rose by 29 percent.
Sunday 7 November 2010
Jones has never fired a coach midseason
It marked the first time that Jones, who has never fired a coach midseason, did not assure the media that Phillips would remain Dallas' coach for the rest of the season. The 1-7 Cowboys have lost five consecutive games.
"There are a lot of people here who are certainly going to suffer and suffer consequences," Jones said. "I'm talking about within the team -- players, coaches who have got careers. This is certainly a setback. I know firsthand what it is to have high expectations. I think unquestionably that our expectations were thinking we're something we were not, possibly looking at what might be relative to a Super Bowl. All of those things have certainly contributed early.
"But we have so many things that we need to correct and address, as this game so vividly exposed and previous games have. I've got a lot of work to do, got a lot of decisions to make. And it's not just one, two, three or four. There are several decisions. I think everybody in this country would agree that there's a lot wrong with this team that we've got to address, and I'm certainly the one to address it."
More From ESPN Dallas
Everything you need to know about the Cowboys' game against the Packers can be found in our Team Center.
• Check out the Cowboys blog
Jones said he would talk to his team Monday. He would not say what he planned to discuss with the Cowboys.
Phillips, who admitted that the Cowboys played like a poorly coached team, avoided a question about whether he expects to be fired.
"I'm not into all of that," Phillips said. "I don't even know who we play next. I was focused on this game."
Jones also declined to discuss any specific issues, saying that the Packers simply outplayed the Cowboys in every phase of the game.
"I can't put my finger on it because I don't have enough fingers," Jones said.
"There are a lot of people here who are certainly going to suffer and suffer consequences," Jones said. "I'm talking about within the team -- players, coaches who have got careers. This is certainly a setback. I know firsthand what it is to have high expectations. I think unquestionably that our expectations were thinking we're something we were not, possibly looking at what might be relative to a Super Bowl. All of those things have certainly contributed early.
"But we have so many things that we need to correct and address, as this game so vividly exposed and previous games have. I've got a lot of work to do, got a lot of decisions to make. And it's not just one, two, three or four. There are several decisions. I think everybody in this country would agree that there's a lot wrong with this team that we've got to address, and I'm certainly the one to address it."
More From ESPN Dallas
Everything you need to know about the Cowboys' game against the Packers can be found in our Team Center.
• Check out the Cowboys blog
Jones said he would talk to his team Monday. He would not say what he planned to discuss with the Cowboys.
Phillips, who admitted that the Cowboys played like a poorly coached team, avoided a question about whether he expects to be fired.
"I'm not into all of that," Phillips said. "I don't even know who we play next. I was focused on this game."
Jones also declined to discuss any specific issues, saying that the Packers simply outplayed the Cowboys in every phase of the game.
"I can't put my finger on it because I don't have enough fingers," Jones said.
Thursday 4 November 2010
Phil Jackson owe Kobe Bryant an apology?
Bryant had 30 points, 12 assists and 10 rebounds in the Lakers' 112-100 victory over Sacramento at Arco Arena.It was his 17th career triple-double, and it wasn't the end of his stat line. He was nine of 10 from the free-throw line and committed only one turnover. The one minor critique would have been his accuracy — nine-for-22 shooting — but it was almost nitpicking compared to the rest of his work.
Bryant also set a franchise record two minutes into the game, passing Kareem Abdul-Jabbar for career minutes. Bryant has now logged 37,527 minutes, all with the Lakers, of course.Jackson said Bryant could still be moving better defensively, but he conceded he "had a terrific night."
"His shot's on, he's got leg strength," Jackson said. "I still want to see him run freely. But he played a great game."Bryant didn't seem to mind if his coach considered him fully sound."I don't [care] whether he says it or not," he said. "I'm 100%. It is what it is."
The Kings (3-2) have been dying to resume their rivalry with the Lakers (5-0), and it might happen one of these seasons, but one overriding sense came out of Wednesday's game:Not … quite … there.
The Kings have a nice blend of youth and talent, but second-year guard Tyreke Evans (21 points) couldn't show much of it after getting in foul trouble, and rookie center DeMarcus Cousins had a bland 11 points and six rebounds.
Pau Gasol answered with 22 points, Lamar Odom had 18 and Ron Artest had 17. Derek Fisher (11 points) came alive late in the game after the Kings moved within seven, burying a three-pointer and then completing a three-point play on the next possession for a 105-92 lead with 3:14 to play.
Tuesday 2 November 2010
PCTV Software Reviews-PC satellite TV Make you Closer to the World
When entering into market previously, it was sold at about $350. The price was so astounding that many people refused to pay it. Fortunately,I got it online at cheaper price which make me so excited because it help me save a lot of money. From that on, my life become very wonderful and colorful with the endless Satellite channels for baseball, football, soccer, basketball, tennis, and racing!
Not only can you watch many sport games you like with it, but also channels for movies, music, Kids Channels, Shopping News, Radio Stations, Weather, Educational, and many others. Maybe you felt very boring in your life before, but there is a great difference after purchasing the software. It seems that you can share the experiences and stories with all global people,which make you closer to the world.
Although there are many other PC on TV softwares, they are scarcely comparable to the software. The compatible operating system including Microsoft Windows 98/ME/2000/XP is installed on a PC on satellite TV software, which make it easier for you to watch programs uninterruptedly.
Buying PC on satellite TV software online is the best choice if you don't want to spend more on it. As for the price, I think it is unnecessary for you to worry about because all shopping websites can offer a refund guarantee in case that you are not satisfied with the software. Moreover, there are so many choices for you online so you can get the high quality products at cheap price by comparing different suppliers.
If you take the time to count down the money that you have spent on cable television, you will feel very incredible. Moreover, installing satellite TV PC software is also legal and accessible at any place in the world, so why not?
So happy to be a fan of Taylor Swift
Drew looks at me I fake a smile so he won't see What I want and I need And everything that we should be I'll bet she's beautiful That girl he talks about And she's got everything That I have to live without Drew talks to me I laugh 'cause it's just so funny I can't even see Anyone when he's with me He says he's so in love He's finally got it right I wonder if he knows He's all I think about at night He's the reason for the teardrops on my guitar The only thing that keeps me wishing on a wishing star He's the song in the car I keep singing Don't know why I do Drew walks by me Can he tell that I can't breathe? And there he goes, so perfectly The kind of flawless I wish I could be She better hold him tight Give him all her love Look in those beautiful eyes And know she's lucky 'cause He's the reason for the teardrops on my guitar The only thing that keeps me wishing on a wishing star He's the song in the car I keep singing Don't know why I do So I drive home alone As I turn out the light I'll put his picture down And maybe get some sleep tonight 'Cuz he's the reason for the teardrops on my guitar The only one who's got enough of me to break my heart He's the song in the car I keep singing Don't know why I do He's the time taken up but there's never enough And he's all that I need to fall into Drew looks at me I fake a smile so he won't see
Monday 1 November 2010
Taylor Swiftcreate her own line of perfume products
Elizabeth Arden, makers of designer perfumes for fashion line Juicy Couture and celebrities such as Britney Spears and Elizabeth Taylor, said on Monday the first fragrance will be launched in late 2011.
Swift, 20, will be personally involved in all aspects of product development, packaging and advertising. There is no name as yet for the new line.
The announcement comes a week after the Grammy Award winning singer-songwriter Swift released her third album "Speak Now" to good reviews. Her previous album "Fearless" propelled a 10-month tour and was the biggest selling album of 2009.
"I have always loved how fragrance can shape a memory, the way certain scents remind you of events and people that are imprinted in your thoughts," Swift said in a statement.
Elizabeth Arden executive vice president Ronald Rolleston called Swift a "role model who inspires her fan base every day."
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