Non-negative Pump Introduction

https://www.eu-flo.com/wp-content/uploads/2018/04/VSBP-1.jpg

Non-Negative Pump
Non-Negative Pump

non-negative pressure water supply pump packing composition Introduction of pump manufacturers in china

non-negative pressure water supply pump packing composition Introduction by pump supplier of eu-flo

Non-negative pressure water supply pump packing consists of vacuum pressure tank, vacuum suppressor, variable frequency speed control pump unit, pressure sensor, variable frequency control cabinet, backflow preventer (optional), disinfection device (optional), small vacuum pressure tank for holding pressure (optional) ) and other components. The inlet pipe drawn from the municipal pipe network is directly connected to the water inlet of the vacuum pressure tank , and the water outlet of the vacuum pressure tank is connected to the inlet pipe of the pressurized pump group through the disinfection device, and the outlet pipe of the pressurized unit is connected with the user water pipe. Directly supply water to the user pipe network.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

 

Fire Pump Maintenance

Fire Pump Maintenance
Fire Pump Maintenance

Fire pump maintain and maintenance of pump manufacturers in china

Fire pump maintain and maintenance by pump supplier of eu-flo

  1. The fire pump been checks every shift and guarantees that the power supply and circuit of the fire protection system are unobstructed, and the electrical well equipped.
  2. Every shift turning pump by hands, to checking the coupling should be light and heavy be balanced, no abnormal noise and make record.
  3. Check the Lubrication oil level in the vacuum installation on the 5th, 10th, 15th, 20th, 25th and 30th of each month. The oil position is at the center line of the oil window or slightly lower than the center line; start the fire truck fire pump, Check the fire pump water in coming time and make a record. The 1# and 2# pumps run for 15 minutes, and the 3# and 4# pumps run for 5 minutes.
  4. Check the operation of the float assembly after the pumps is started. There should be no water in the exhaust hose. If there is water, it is necessary to change the float seal.
  5. After the pump is started, check whether the sealing body can be tightly sealed and the exhaust air can be normal.
  6. Check the packing seal level after the pump is started. The leakage should not exceed 10-30 drops/min.
  7. Regularly check the Lubrication oil of all parts of the pump to ensure that the lubrication system works normally.
  8. Regularly check whether the joint parts can be tightened or not.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

Non-negative Pump History

 

Non-Negative Pump History
Non-Negative Pump History

non-negative pressure water supply pump packing Development history of pump manufacturers in china

non-negative pressure water supply pump packing Development history by pump supplier of eu-flo

The non-negative pressure water supply pump packing is a pressurized water supply package directly connected with the municipal water supply pipe network, and the non-negative pressure water supply equipment is connected in series with the residual pressure of the municipal pipe network to ensure that the municipal pipe network pressure is not less than the set protection pressure ( It may be a secondary pressure water supply device that is a pressure of 0 relative pressure and a pressure of less than 0 pressure. The core of the water supply equipment for pipe network (no negative pressure) is how to prevent the generation of negative pressure during the operation of the secondary pressurized water supply system, and eliminate the impact of the operation of the unit on the municipal pipe network, while ensuring that the water consumption of nearby users is not affected. Achieve safe, reliable, smooth and continuous water supply.

The non-negative pressure water supply pump packing is also called the pipe network superimposed water supply equipment. At present, there are mainly tank type non-negative pressure water supply pump packing and box type non-negative pressure water supply pump packing.

development path: the superimposed water supply technology was first developed from Japan. In the mid-1980s, Japan began research on this aspect. The research content is not limited to the technical level, but also the market demand, administrative management and law, urban high-level building water supply model been Discussions have also begun. The direct water supply system was included in the national policy “The long-term goal of the transformation and reconstruction of the water supply system for the 21st century” by the Japanese Ministry of Health and Welfare, and the water supply design code was revised accordingly to provide water pressure for the service of the water supply pipe network. From the original 0.15Mpa to 0.2MPa, the state has provided corresponding funds to build a laboratory of a certain scale in Chiba Prefecture, and organized a group of scientific research institutions, water supply enterprises, scholars and product manufacturers. After the preparation of the funds, the research on “direct water supply” was carried out. It is planned to complete the research of “promoting the direct water supply system” with three years of time and do a lot of research on related topics. The Sapporo City Waterway Bureau of Japan began to implement a new secondary water supply plan in 1992. In that year alone, 68 buildings were supplied with water supply by superimposed water supply equipment, and the original water tank was cancelled, and the effect of the transformation was evaluated quite well. The professional water company DAREYET Water Group of the United States has been committed to the development of new technologies for secondary water supply, and has successfully promoted the use of superimposed water supply equipment in the United States and around the world. By the end of the 1990s, pipe network superimposed water supply technology has been widely used in Japan, the United States, Western Europe and other countries.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

Pump Selection Indication

Pump Selection Indication
Pump Slection Indication

Choose a pump indication by one the pump manufacturers in china

How to purchasing pump by the pump supplier of eu-flo

The flow rate of the pump, that is pump discharge water capacity, should not be chosen too much, otherwise it will increase the cost of purchasing . Should be selected as needed, such as the self-priming water pump used in home, the flowrate should be selected as small as possible; for example the submersible pump used for irrigation in home, the flowrate can be appropriately selected biger.

1) It is necessary to purchase a water pump according to local conditions. There are three types of commonly used agricultural water pumps, which is centrifugal pumps and axial water pumps and mixed flow pump.The centrifugal pump has a high head, but the water capacity discharged is not large, and it is suitable for mountainous areas and well irrigation areas. The axial flow pump has a large water capacity discharged, but the head is not too high, which is suitable for use in plain areas; the water capacity discharged and head of the mixed flow pump are between the centrifugal pumps and the axial pump, it is suitable for use in plains and hills. Users should purchase according to the local conditions, water source and water lifting height.

2) It is necessary to properly select the pump. After determining the type of pump, it is necessary to consider its economic performance, paying particular attention to the choice of the head and flowrate of the pump and its supporting power. It must be noted that the head (total head) indicated on the pump plate is different from the head of the water (actual head) when used, because there is a certain resistance loss when the water flows through the water pipe and the pipeline. Therefore, the actual head is generally 10%-20% lower than the total head, and the capacity of water dishcarged is also reduced accordingly. Therefore, in actual use, it can only be estimated from 80% to 90% of the head and flow rate of the name plate. The choice of pump power can be selected according to the power indicated on the name plate. In order to make the pump start quickly and safely used, the power of power machine can also be slightly larger than the power required by the pump, generally about 10% higher; if there is power, when purchasing the pump, you can purchase the pump according to the power of the power machine.

3) It is necessary to purchase water pumps strictly. When purchasing, it is necessary to verify the “three certificates”, that is, agricultural machinery promotion licenses, production licenses and product inspection certificates. Only three certificates can avoid the purchase of obsolete products and inferior products.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

 

Pump Testing Centre

Pump Testing Device
Pump Testing Device

 

Pump Testing Desk
Pump Testing Desk

pump performance Testing Centre Composition of pump manufacturers in china

pump performance Testing Centre Composition by pump supplier of eu-flo

The  Pump  Testing centre of the complete pump Performance Testing Desk should include the following main parts

1). Power source

2). Transmission system

3). Measurement and control system;

4). auxiliary system.

Pump performance test Desk Applications:

Electrical measurement type:

  1. A complete set of microcomputer automatic test system should be including the following equipment:

1) GA drawings of pools and pipelines;

2) One Electric power Control panel;

3) Flowrate sensor

4) Pressure transmitters;  2Set

5) Current Transformers; 3 Set

6) DC dual-arm bridge;

7) Pump product parameter measuring instrument; 1 set;

8) Pump product testing software;               1 copy

 9) One popular Computers in current

10) One Printer;

   For  Torque type:

In addition to the above devices, the following devices is needed.

Torque speed sensor.

Pump Performance Testing Report.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

 

Upgrading Efficienty Pump

Upgrading Efficienty Pump
Upgrading Efficienty Pump

Efficient centrifugal pump energy saving Wonderful effect of pump manufacturers in china

Efficient centrifugal pump energy saving Wonderful effect by pump manufacturers of eu-flo

 In the past, domestic chemical plants basically used ordinary circulating cooling water to transport centrifugal pumps. Because of the low efficiency of such centrifugal pumps, the loss of electrical work is particularly serious. In the second half of 2011, Shanghai Chlor-Alkali Chemical Co., Ltd. PVC plant successfully upgraded the circulating cooling centrifugal water pump, and the actual energy saving effect reached more than 38%.

In chemical production processing, the heat exchange process of heat and mass transfer must be carried out. Therefore, basically all chemical plants need to use circulating cooling water to transfer heat from the production process and cool it. Circulating cooling water transportation generally adopts a centrifugal pump with high power and large flow rate, because the circulating cooling water is basically a continuous uninterrupted process, and the centrifugal pump consumes a large amount of electric energy. In the past, ordinary circulating cooling water conveying centrifugal pumps used in domestic chemical plants have low efficiency and serious loss of electrical work. Until the last year or two, this problem was solved with the appearance of Efficient centrifugal pumps.

 hereby, the plant successfully upgraded the circulating cooling  centrifugal water pump in the second half of last year. This upgrading first uses the high-efficiency fluid transport technology to detect the calculation equipment, systematically detects and analyzes the circulating cooling water system, analyzes the hydrodynamic characteristics of the circulating cooling centrifugal water pump, and combines the special calculation software to optimize the calculation, and then according to the most Optimized calculation results, select the suitable high-efficiency energy-saving circulating cooling centrifugal water pump, instead of the conventional low-efficiency operation of ordinary circulating cooling water centrifugal pump, the upgrading achieved a one-time success.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

Pump Installation Heigh

 

Pump Installation Height
Pump Installation Height

Centrifugal pump installation height Hg of pump manufacturers in china

Centrifugal pump Installation Height Hg by Pump Supplier of eu-flo.com

Allowable suction vacuum height Hs is the maximum vacuum that can be reached by the pressure p1 at the pump inlet.

    The actual allowable vacuum height Hs value is not a value calculated according to the formula, but a value determined experimentally by the pump manufacturer. This value is attached to the pump catalogue for the user to reference. It should be noted that the Hs value given in the pump catalogue is the value when the water is used as the working medium, the operating condition is 20 ° C and the pressure is 1.013 × 105 Pa. When the operating conditions and working medium are different, the conversion is required.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

Centrifugal Pump Principle

Centrifugal Pump Principle
Centrifugal Pump Principle

Centrifugal pump working principle of pump manufacturers in china

Centrifugal Pump working principle by pump supplier of eu-flo.com

Centrifugal Pump Working Principle introduction

A centrifugal water pump is a machine that delivers or pressurizes a liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, and increases the energy of the liquid. It is mainly used to transport liquids including water, oil, acid and alkali, emulsion, Suspension emulsion and liquid metal, and also to transport liquids and gas mixtures. And a liquid containing suspended solids. The technical parameters for measuring the performance of the pump include flow, suction stroke, lift, shaft power, water power, efficiency, etc.; according to different working principles, it can be divided into volume pump and vane pump. The volumetric pump uses its change in the volume of the working chamber to transfer energy. The vane pump uses the interaction of the rotating blades and water to transfer energy. There are centrifugal pump, axial flow pump and mixed flow pump

 

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump

Submersible Pump Characteristics

The Submersible pump technical characteristics been analyzed by The pump manufacture in china

The Submersible pump technical characteristics been analyzed by The pump manufacture in china

 Similar to a conventional water pump, a submersible pump can be used for drainage in most applications, the only condition being the needed is a stable power supply to drive the motor.

Submersible Pumps Main features:

1) The submersible pump is directly coupling to the motor. The small submersible pump even fixed the pump impeller directly on the motor shaft, eliminating many connected parts, shortening the overall size of the pump, reducing material consumption and reducing weight. When the submersible pump been instead of the deep well pump application, and reducing the deep well pump’s problem of long-shaft failure rate , and improving the equipment reliability.

2) The characteristics of the submersible pump are simple to installation, no need to build a pump Room, small civil construction area, reduced infrastructure investment, and the submersible pump directly diving into the water, only need the ground construction of electrical control equipment, easy to use and maintain.

3) The characteristics of the submersible pump are also low noise operation under water. It is suitable for water supply and drainage in places where the working environment requires quiet, such as schools, hospitals, hotels, and halls.

4) The submersible pump is operated underwater. The characteristics of the submersible pump are not affected by the climate and the surrounding working environment; it is easy to conceal and is suitable for combat preparation and strategic needs.

5) Using the submersible pump to lift water, the depth of water lifting increases, and the problem of cavitation is less.

6) The Interior submersible motor can ensure that the Electric submersible pump can operate for a long time even when it is approaching to the draining sink, and there is no need to worry about the problem that the motor has a high temperature and burns due to a large unload current.

7) Technical characteristics of submersible pumps may cause leakage, water in cable, mechanical seal leakage and other static sealing components. These problems may cause the whole pump to burn or cause electric leakage.

pump manufacturers in china|eu-flo pump

pump supplier in china|eu-flo pump