Industry News--China Hongpai Pumps Co., Ltd.

Analysis on Problems in China Machinery, Pump and Valve Industries
september.07.2010

The lack in variety and specifications of basic parts in China's machinery caused the big gap with high-end products, therefore can't meet the growing needs of the machinery. At present, the performance of base parts is just equivalent to the international level of 1980’s. The unstable quality, high failure rate in early period and poor reliability are fatal weakness of foundation pieces. Therefore, many OEMs often choose imported base-sets in order to improve the market competition of its pumps machinery, which results in less domestic market share of domestic-based pieces extraordinarily the low-tech products. Although the export advantage of China's basic power items is obvious, they are mainly labor-intensive plastic valve products in large quantities, low-value and not high technical value-added.

First, serious overlapping, low degree of specialization, unformed scale and low economic efficiency

Compared with machinery, the spare generator components new enterprises require relatively less initial financial and technical inputs. Therefore, in several national economic bag making machine development period a number of basic parts manufacturers have set up but get along with the big quantity and small productivity, which couldn’t form economies of scale. Even if basic pieces enterprises are gradually independent from the machinery line, but most of the companies no matter large or small are in wide range, which complete with lack of specialization, low level of blow molding machine equipment, unstable quality and low economic profits. The per capita pump output in industrialized countries is about USD 150 000-200 000, while there is only RMB 40 000 to 50 000 in China. In recent years, with the common cip development policy carrying out for multiple ownership, the basic components industry is experiencing the intensive pvc fitting development process from decentralization to concentration gradually.

Second, weak research and development, insufficient capital investment and slow technological progress

In late 1970s and early 1980s, basic spare industry has introduced a number of foreign advanced pumps technologies, but they lacked of adequate hardware and software investment in absorption. According to foreign experience, the required capital ratio of technology introduction and absorption and implementation is about 1:7, but China learns it very late, which result in the slow of development. Actually the market competition is just a challenge for technical strength. Foreign countries have attached great importance for it, they achieve technical heights through input large investment. The funds of research and development of many well-known slitting machinecompanies are 4 to 5 of their turnover, even reach 10 for focus areas. At present in China many university institutes are engaged in science research, and a lot of theoretical pumps research, scientific research and patents papers show a very high level, but the combination with the actual production is not tight that caused the low speed of transforming into commodities.

Above provided by SelectChina.com, and find more information on China Machinery News/ China Machinery Manufacturers / China Machinery Products.

China Pump Enterprises Should Speed Up the Technological Innovation
september.01.2010

Mr. Ji Mingzhu, the stationmaster of Hebei Supervision & Testing Center For Pump Quality, thinks that China pumps manufacturers should speed up the pace of technological innovation, to transform from low-cost competition form to R & D-based enterprises, thereby to enhance the core competitiveness of the whole industry.

With the continuous development of market economy, the business idea and pumps market demand are changing, as well as the enterprise system. The core mission for each enterprise should be as below: trying best to adapt to current market demands and rapidly developing economy needs all over the world, and to develop pvc fitting marketable products. Besides through introducing high technology, it would be a magic key for success to restructuring and founding a new-type enterprise with modern management and superior philosophy. The rapid rise of joint-stock enterprises and private companies in recent years fully illustrated this power motor, such as Shanghai Kaiquan, Tianjin Ganquan, Shanxi Tianhai, and Xinjie & Dayuan from south Zhejiang. These enterprises have formed the industry backbone of a new generation, showing a positive role in promoting development of China's pump industry. And to join together with the original state-owned enterprises, they formed a solid framework for China's pump industry.

Facing the current situation of domestic market, the technical institute pumps is no vitality if they divorced from enterprise economy. Thus the slitting machine adoption for ‘dumbbell’ theory is much important, in more precise, science and technology, and market planning is an organic whole, manufacturing link is just a duplication of labor process, so to strengthen the construction of two sides is particularly important.

Besides, China manufactures need to do better in technics and manufacture level. Many Made-in-China generator products are very competitive on quality for the worldwide market, but their value was discounted by the rough process craftwork, such as the appearance quality and design bag making machine. The craftwork of Made-in-China products still lags behind comparatively. In modern society, the commodity plastic valve economy is not only the simple functional demand, but also the perfect performance of artistic and culture. Therefore, manufactures should do better for the face cip performance of the commodity, not just simple painted cover. The appearance blow molding machine design should be beautiful and artistic that full of inspiration, thus, who buy the products will also get your culture that shows all your care and efforts.

Above provided by SelectChina.com, and find more information on China Machinery News/ China Machinery Manufacturers / China Machinery Products.

Heat Pump Prices: How To Get The Best Deals

So you are looking at heat pump prices...First things first: What is a heat pump? A heat pump is simply a device for moving ('pumping') heat from one location to another, either to heat or cool an area. Some heat pumps use the air, others the ground, as their source for heat. Heat pump prices depend on the following: -The size of the unit -Optional units attached to it (such as for heating hot water) -The type: air- or ground- source -Whether it will be used for heating, cooling, or both (most can do both)

One thing to note: you cannot save money, or get lower heat pump prices, by trying to do the installation yourself. You MUST use a trained professional. NO EXCECPTIONS! In your search for the best heat pump prices, always buy from a reputable seller - and don't take someone's second-hand unit, you don't really know what condition it is in. Heat pump prices will also be affected by manufacturer, seller, or installer warranties offered. Don't be tempted to buy a unit without one. Heat pump prices that don't include a warranty can be deceptive.
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Heat Pump Energy Efficiency

Heat pumps are potentially the most efficient type of electric heat. When heat pumps properly installed, heat pumps can deliver 1 1/2 to 3 times more heat energy to a home than the electric energy they consume. Unfortunately, the energy savings produced by the heat pump's design are often lost to poor installation and neglected maintenance.

All heat pumps include two different heating systems: compressor heating and auxiliary heating. During moderately cool weather, your heat pump engages it's first stage to heat your home. In this most-efficient mode, it works like an air conditioner in reverse, using a compressor to circulate refrigerant through the outdoor coil and gathering heat from the outdoor air. The refrigerant then carries heat to the indoor coil and releases it into the home. This first stage works well down to about 35 degrees. Below this temperature, heat pumps don't work as effectively, and the second stage of heat is activated. This less-effective stage utilizes electric resistance coils to produce heat, but it is the only option during severe weather.
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Heat Pump Maintenance

A well-maintained heat pump could save 10% to 25% on your energy costs. When installed and tested by a qualified technician, heat pumps can deliver many years of dependable service and comfort. Below are some steps you can follow to ensure that your heat pump gives you optimum performance. Note: When you're cleaning your heat pump, remember to switch it off first and shut off the power to your outdoor unit. Note: if you aren't confident in your ability to perform these tasks safely and correctly, don't do it. Hire a contractor instead.

Do-It-Yourself Maintenance Tips For Your Heat Pump. Here are a few basic steps to ensure the long-term efficient operation of your heat pump: The thermostat should be set and left alone; don't change it too frequently. If you have a programmable thermostat for your heat pump, it will let you regulate the temperature more efficiently. Air filters should be cleaned or replaced every one to three months. If the indoor coils are accessible, check and clean them.
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More pump protections needed: critics

Critics say more has to be done to keep gas stations from running inaccurate pumps that deliver less gas than advertised on the meter. And a crackdown on inaccurate pumps promised by the Federal Industry Minister Jim Prentice earlier this year hasn't materialized, said Mel Fruitman of the Consumers Association of Canada.
On a pump at a Tempo on Lougheed Highway in Coquitlam, CTV News found one pump that gave out less gas than it advertised on two tests conducted by CTV News. In one of three tests by CTV News, the pump gave more gas than it said on the meter. The manager admitted that the pump sometimes gave out more or less gas than it said on the meter. He promised to fix the problem. But that pump bore a sticker that indicated that Measurement Canada testers hadn't visited since 2002. The country is in the middle of an election, and the promised legislation hasn't materialized. Prentice defended his efforts to CTV News. "The regulatory changes that will change the system are things I've spoken about and I'm committed to," he said. "Those regulations have been drafted, and they require legislative changes.
--------------------------------------------------------------------------------------------------------------------------------------------------
Pumps as public water supplies

A pump is a device used to move fluids, such as gases, liquids or slurries. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure they only displace fluid causing a flow. Adding resistance to flow causes pressure.The earliest type of pump was the Archimedes screw, first used by Sennacherib, King of Assyria, for the water systems at the Hanging Gardens of Babylon and Nineveh in the 7th century BC, and later described in more detail by Archimedes in the 3rd century BC.[1] In the 13th century AD, al-Jazari described and illustrated different types of pumps, including a reciprocating pump, double-action pump, suction pump, and piston pump.Pumps fall into two major groups: positive displacement pumps and rotodynamic pumps . Their names describe the method for moving a fluid.

Positive displacement pumps,A lobe pump.Hand-operated, reciprocating, positive displacement, water pump in Kosice-mahanovce, Slovakia (walking beam pump).Mechanism of a scroll pumpA positive displacement pump causes a fluid to move by trapping a fixed amount of it then forcing (displacing) that trapped volume into the discharge pipe. A positive displacement pump can be further classified as eithera rotary-type (for example the rotary or vane),lobe pump similar to oil pumps used in car engines, or the Wendelkolben pump or the helical twisted Roots pump.
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Multi-source heat pump technology Application

China's annual sunshine time of more than 2,000 hours in the two-thirds of the land area, there is sufficient low-grade solar and other clean energy. The project to develop the cylindrical array volume phase change heat transfer and energy storage characteristics of the heat pump system for full use of solar energy and soil, renewable energy sources, the system's operating costs than traditional heating, refrigeration system operation costs greatly reduced, the system will help to promote the use of high-carbon economy, alleviate many contradictions to reduce environmental pollution, with obvious economic and environmental benefits and good prospects of the industry. Research topics collector's collector of low cost and high efficiency, easy maintenance. Phase change Regenerative devices can store solar energy not only during the day, at night and can use cheap electricity storage of soil and other sources of heat in the low energy, the power load to peak load shifting, a broad market prospect.
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Pump Industry Analyst

Pump Industry Analyst is the most comprehensive source of international business news available on the market today. Every month, all the latest facts and figure have been reviewed, analysed and sifted through for you by our editorial team, allowing you to do your job more effectively and plan sound business strategies.

Contents include:
Industry news: read about all the latest major monthly news and the facts behind the headlines, plus all the general news - major contracts and new orders, new plants and technology, licensing, standards, people moves and dividends.Market prospects: news items and market trends for all the main end-user industries, helping you to monitor and forecast your existing and future markets.Company profile: an in-depth analytical look at the structure, performance, strategic outlook and annual results of major pumping equipment manufacturers.Company watch: monitor the quarterly and interim results of your competitors - the key figures, plus our expert interpretation.
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China to pump 1000 bln yuan into environmental protection

According to CRI Online, China will raise more than 1000 billion yuan for environmental protection in the coming 3 years, revealed Zhou Shengxian, Minister of the Ministry of Environmental Protection of PRC at CCICED 2008 Annual Meeting, adding that in order to cope with the international financial crisis, the Chinese government recently has promulgated a number of initiatives to expand domestic demand, in which environmental protection is stressed.

Zhou Shengxian said: "It now appears that this is a rare opportunity. We should regard the development of the green industry as an important aspect of expanding domestic demand by cultivating new industries including the development of new and renewable energy, energy, water and materials saving and pollution treatment into new economic growth points. We should attach great importance to improving the environment and the people's livelihood by formulating and improving development strategies, policies and standard systems on the environmental protection industry, promoting the construction of technological innovation systems, upgrading the technological level and strengthening investment in the environmental protection industry. Over the next three years, China will pool more than 1000 billion yuan for environmental protection. "
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SCHROEDAHL AUTOMATIC RECIRCULATION SYSTEMS

A centrifugal pump can overheat and be damaged when flows are less then the minimum amount specified by the manufacture. The primary function of a pump protection system is to maintain a minimum flow thru the pump at low loads. This flow is allowed to pass thru the pump and diverted into a bypass line so that the process system will not be affected. This bypass flow is typically returned to the pump suction supply side of the system.Two types of systems are commonly used to fulfill this function, a Conventional Feedback Control System or a Self-Contained Automatic Recirculation Valve.

The Conventional Feedback Control System
Key Components:
A check valve in the main pump discharge line to protect the pump from reverse flow.
A flow meter/sensor in the main discharge line to provide indication of the pump flow rate.
A flow controller or DCS input/output point to provide required bypass flow rate.
An electrically/pneumatically actuated bypass valve to maintain required bypass flow rate.
Valve automation equipment to convert bypass flow rate output signal to valve travel.
All wiring for the feedback control loop.
The Self-Contained Automatic Recirculation System


Analysis on Problems in China Machinery, Pump and Valve Industries september.07.2010 The lack in variety and specifications of basic parts in China's machinery caused the big gap with high-end products, therefore can't meet the growing needs of the machinery. At present, the performance of base parts is just equivalent to the international level of 1980’s. The unstable quality, high failure rate in early period and poor reliability are fatal weakness of foundation pieces. Therefore, many OEMs often choose imported base-sets in order to improve the market competition of its pumps machinery, which results in less domestic market share of domestic-based pieces extraordinarily the low-tech products. Although the export advantage of China's basic power items is obvious, they are mainly labor-intensive plastic valve products in large quantities, low-value and not high technical value-added. First, serious overlapping, low degree of specialization, unformed scale and low economic efficiency Compared with machinery, the spare generator components new enterprises require relatively less initial financial and technical inputs. Therefore, in several national economic bag making machine development period a number of basic parts manufacturers have set up but get along with the big quantity and small productivity, which couldn’t form economies of scale. Even if basic pieces enterprises are gradually independent from the machinery line, but most of the companies no matter large or small are in wide range, which complete with lack of specialization, low level of blow molding machine equipment, unstable quality and low economic profits. The per capita pump output in industrialized countries is about USD 150 000-200 000, while there is only RMB 40 000 to 50 000 in China. In recent years, with the common cip development policy carrying out for multiple ownership, the basic components industry is experiencing the intensive pvc fitting development process from decentralization to concentration gradually. Second, weak research and development, insufficient capital investment and slow technological progress In late 1970s and early 1980s, basic spare industry has introduced a number of foreign advanced pumps technologies, but they lacked of adequate hardware and software investment in absorption. According to foreign experience, the required capital ratio of technology introduction and absorption and implementation is about 1:7, but China learns it very late, which result in the slow of development. Actually the market competition is just a challenge for technical strength. Foreign countries have attached great importance for it, they achieve technical heights through input large investment. The funds of research and development of many well-known slitting machinecompanies are 4 to 5 of their turnover, even reach 10 for focus areas. At present in China many university institutes are engaged in science research, and a lot of theoretical pumps research, scientific research and patents papers show a very high level, but the combination with the actual production is not tight that caused the low speed of transforming into commodities. Above provided by SelectChina.com, and find more information on China Machinery News/ China Machinery Manufacturers / China Machinery Products. ----------------------------------------------------------------------------------------- China Pump Enterprises Should Speed Up the Technological Innovation september.01.2010 Mr. Ji Mingzhu, the stationmaster of Hebei Supervision & Testing Center For Pump Quality, thinks that China pumps manufacturers should speed up the pace of technological innovation, to transform from low-cost competition form to R & D-based enterprises, thereby to enhance the core competitiveness of the whole industry. With the continuous development of market economy, the business idea and pumps market demand are changing, as well as the enterprise system. The core mission for each enterprise should be as below: trying best to adapt to current market demands and rapidly developing economy needs all over the world, and to develop pvc fitting marketable products. Besides through introducing high technology, it would be a magic key for success to restructuring and founding a new-type enterprise with modern management and superior philosophy. The rapid rise of joint-stock enterprises and private companies in recent years fully illustrated this power motor, such as Shanghai Kaiquan, Tianjin Ganquan, Shanxi Tianhai, and Xinjie & Dayuan from south Zhejiang. These enterprises have formed the industry backbone of a new generation, showing a positive role in promoting development of China's pump industry. And to join together with the original state-owned enterprises, they formed a solid framework for China's pump industry. Facing the current situation of domestic market, the technical institute pumps is no vitality if they divorced from enterprise economy. Thus the slitting machine adoption for ‘dumbbell’ theory is much important, in more precise, science and technology, and market planning is an organic whole, manufacturing link is just a duplication of labor process, so to strengthen the construction of two sides is particularly important. Besides, China manufactures need to do better in technics and manufacture level. Many Made-in-China generator products are very competitive on quality for the worldwide market, but their value was discounted by the rough process craftwork, such as the appearance quality and design bag making machine. The craftwork of Made-in-China products still lags behind comparatively. In modern society, the commodity plastic valve economy is not only the simple functional demand, but also the perfect performance of artistic and culture. Therefore, manufactures should do better for the face cip performance of the commodity, not just simple painted cover. The appearance blow molding machine design should be beautiful and artistic that full of inspiration, thus, who buy the products will also get your culture that shows all your care and efforts. Above provided by SelectChina.com, and find more information on China Machinery News/ China Machinery Manufacturers / China Machinery Products. ----------------------------------------------------------------------------------------- Heat Pump Prices: How To Get The Best Deals So you are looking at heat pump prices...First things first: What is a heat pump? A heat pump is simply a device for moving ('pumping') heat from one location to another, either to heat or cool an area. Some heat pumps use the air, others the ground, as their source for heat. Heat pump prices depend on the following: -The size of the unit -Optional units attached to it (such as for heating hot water) -The type: air- or ground- source -Whether it will be used for heating, cooling, or both (most can do both) One thing to note: you cannot save money, or get lower heat pump prices, by trying to do the installation yourself. You MUST use a trained professional. NO EXCECPTIONS! In your search for the best heat pump prices, always buy from a reputable seller - and don't take someone's second-hand unit, you don't really know what condition it is in. Heat pump prices will also be affected by manufacturer, seller, or installer warranties offered. Don't be tempted to buy a unit without one. Heat pump prices that don't include a warranty can be deceptive. -------------------------------------------------------------------------------------------------------------------------------------------------- Heat Pump Energy Efficiency Heat pumps are potentially the most efficient type of electric heat. When heat pumps properly installed, heat pumps can deliver 1 1/2 to 3 times more heat energy to a home than the electric energy they consume. Unfortunately, the energy savings produced by the heat pump's design are often lost to poor installation and neglected maintenance. All heat pumps include two different heating systems: compressor heating and auxiliary heating. During moderately cool weather, your heat pump engages it's first stage to heat your home. In this most-efficient mode, it works like an air conditioner in reverse, using a compressor to circulate refrigerant through the outdoor coil and gathering heat from the outdoor air. The refrigerant then carries heat to the indoor coil and releases it into the home. This first stage works well down to about 35 degrees. Below this temperature, heat pumps don't work as effectively, and the second stage of heat is activated. This less-effective stage utilizes electric resistance coils to produce heat, but it is the only option during severe weather. -------------------------------------------------------------------------------------------------------------------------------------------------- Heat Pump Maintenance A well-maintained heat pump could save 10% to 25% on your energy costs. When installed and tested by a qualified technician, heat pumps can deliver many years of dependable service and comfort. Below are some steps you can follow to ensure that your heat pump gives you optimum performance. Note: When you're cleaning your heat pump, remember to switch it off first and shut off the power to your outdoor unit. Note: if you aren't confident in your ability to perform these tasks safely and correctly, don't do it. Hire a contractor instead. Do-It-Yourself Maintenance Tips For Your Heat Pump. Here are a few basic steps to ensure the long-term efficient operation of your heat pump: The thermostat should be set and left alone; don't change it too frequently. If you have a programmable thermostat for your heat pump, it will let you regulate the temperature more efficiently. Air filters should be cleaned or replaced every one to three months. If the indoor coils are accessible, check and clean them. -------------------------------------------------------------------------------------------------------------------------------------------------- More pump protections needed: critics Critics say more has to be done to keep gas stations from running inaccurate pumps that deliver less gas than advertised on the meter. And a crackdown on inaccurate pumps promised by the Federal Industry Minister Jim Prentice earlier this year hasn't materialized, said Mel Fruitman of the Consumers Association of Canada. On a pump at a Tempo on Lougheed Highway in Coquitlam, CTV News found one pump that gave out less gas than it advertised on two tests conducted by CTV News. In one of three tests by CTV News, the pump gave more gas than it said on the meter. The manager admitted that the pump sometimes gave out more or less gas than it said on the meter. He promised to fix the problem. But that pump bore a sticker that indicated that Measurement Canada testers hadn't visited since 2002. The country is in the middle of an election, and the promised legislation hasn't materialized. Prentice defended his efforts to CTV News. "The regulatory changes that will change the system are things I've spoken about and I'm committed to," he said. "Those regulations have been drafted, and they require legislative changes. -------------------------------------------------------------------------------------------------------------------------------------------------- Pumps as public water supplies A pump is a device used to move fluids, such as gases, liquids or slurries. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure they only displace fluid causing a flow. Adding resistance to flow causes pressure.The earliest type of pump was the Archimedes screw, first used by Sennacherib, King of Assyria, for the water systems at the Hanging Gardens of Babylon and Nineveh in the 7th century BC, and later described in more detail by Archimedes in the 3rd century BC.[1] In the 13th century AD, al-Jazari described and illustrated different types of pumps, including a reciprocating pump, double-action pump, suction pump, and piston pump.Pumps fall into two major groups: positive displacement pumps and rotodynamic pumps . Their names describe the method for moving a fluid. Positive displacement pumps,A lobe pump.Hand-operated, reciprocating, positive displacement, water pump in Kosice-mahanovce, Slovakia (walking beam pump).Mechanism of a scroll pumpA positive displacement pump causes a fluid to move by trapping a fixed amount of it then forcing (displacing) that trapped volume into the discharge pipe. A positive displacement pump can be further classified as eithera rotary-type (for example the rotary or vane),lobe pump similar to oil pumps used in car engines, or the Wendelkolben pump or the helical twisted Roots pump. ------------------------------------------------------------------------------------------------------------------------- Multi-source heat pump technology Application China's annual sunshine time of more than 2,000 hours in the two-thirds of the land area, there is sufficient low-grade solar and other clean energy. The project to develop the cylindrical array volume phase change heat transfer and energy storage characteristics of the heat pump system for full use of solar energy and soil, renewable energy sources, the system's operating costs than traditional heating, refrigeration system operation costs greatly reduced, the system will help to promote the use of high-carbon economy, alleviate many contradictions to reduce environmental pollution, with obvious economic and environmental benefits and good prospects of the industry. Research topics collector's collector of low cost and high efficiency, easy maintenance. Phase change Regenerative devices can store solar energy not only during the day, at night and can use cheap electricity storage of soil and other sources of heat in the low energy, the power load to peak load shifting, a broad market prospect. ----------------------------------------------------------------------------------------------------------------------------- Pump Industry Analyst Pump Industry Analyst is the most comprehensive source of international business news available on the market today. Every month, all the latest facts and figure have been reviewed, analysed and sifted through for you by our editorial team, allowing you to do your job more effectively and plan sound business strategies. Contents include: Industry news: read about all the latest major monthly news and the facts behind the headlines, plus all the general news - major contracts and new orders, new plants and technology, licensing, standards, people moves and dividends.Market prospects: news items and market trends for all the main end-user industries, helping you to monitor and forecast your existing and future markets.Company profile: an in-depth analytical look at the structure, performance, strategic outlook and annual results of major pumping equipment manufacturers.Company watch: monitor the quarterly and interim results of your competitors - the key figures, plus our expert interpretation. ----------------------------------------------------------------------------------------------------------------------------- China to pump 1000 bln yuan into environmental protection According to CRI Online, China will raise more than 1000 billion yuan for environmental protection in the coming 3 years, revealed Zhou Shengxian, Minister of the Ministry of Environmental Protection of PRC at CCICED 2008 Annual Meeting, adding that in order to cope with the international financial crisis, the Chinese government recently has promulgated a number of initiatives to expand domestic demand, in which environmental protection is stressed. Zhou Shengxian said: "It now appears that this is a rare opportunity. We should regard the development of the green industry as an important aspect of expanding domestic demand by cultivating new industries including the development of new and renewable energy, energy, water and materials saving and pollution treatment into new economic growth points. We should attach great importance to improving the environment and the people's livelihood by formulating and improving development strategies, policies and standard systems on the environmental protection industry, promoting the construction of technological innovation systems, upgrading the technological level and strengthening investment in the environmental protection industry. Over the next three years, China will pool more than 1000 billion yuan for environmental protection. " ----------------------------------------------------------------------------------------------------------------------------- SCHROEDAHL AUTOMATIC RECIRCULATION SYSTEMS A centrifugal pump can overheat and be damaged when flows are less then the minimum amount specified by the manufacture. The primary function of a pump protection system is to maintain a minimum flow thru the pump at low loads. This flow is allowed to pass thru the pump and diverted into a bypass line so that the process system will not be affected. This bypass flow is typically returned to the pump suction supply side of the system.Two types of systems are commonly used to fulfill this function, a Conventional Feedback Control System or a Self-Contained Automatic Recirculation Valve. The Conventional Feedback Control System Key Components: A check valve in the main pump discharge line to protect the pump from reverse flow. A flow meter/sensor in the main discharge line to provide indication of the pump flow rate. A flow controller or DCS input/output point to provide required bypass flow rate. An electrically/pneumatically actuated bypass valve to maintain required bypass flow rate. Valve automation equipment to convert bypass flow rate output signal to valve travel. All wiring for the feedback control loop. The Self-Contained Automatic Recirculation System
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