1. The structural form of the water pump has an impact on the size, structural form and internal layout of the pump room, so it has a great influence on the cost of the pump station. For example, when the water source level is very low and a very deep pumping station must be built, choosing a vertical pump can reduce the area of the pumping room and reduce the cost. For another example, there is a big difference in the layout of the suction and pressure water pipelines in the station between a single-suction vertical joint water pump and a double-suction horizontal joint water pump.

2. The normal water absorption conditions of the water pump should be ensured. Under the premise of ensuring that cavitation does not occur, the allowable vacuum height of the water pump should be fully utilized to reduce the burial depth of the pump station and reduce the project cost. At the same time, it is avoided that the installation height of each pump in the pump station is too different, resulting in uneven foundation burial depth of each pump or an increase in the burial depth of the entire pump station.

3. A water pump with higher efficiency should be selected. For example, try to use a large pump, because generally large pumps are more efficient than small pumps.

4. According to the different requirements of water supply objects for water supply reliability, a certain number of backup pumps are selected to meet the water requirements in case of accidents: when it is not allowed to reduce the water supply (such as the water supply of blast furnaces and open-hearth workshops of metallurgical plants) ), there should be two sets of backup units; when the water supply is allowed to be reduced in a short period of time, the backup pump only guarantees the supply of emergency water; when the water supply is allowed to be interrupted in a short period of time, only one backup pump can be installed. Pumping stations in urban water supply systems generally have only one backup pump. Usually the backup pump can be the same model as the largest working pump in the pumping station. If there is a sufficiently large highland pool or water tower in the water supply system, which can partially or completely replace the pumping station for short-term water supply, the pumping station does not need to be equipped with a pump, and only a set of spare units can be stored in the warehouse. The standby pump, like other working pumps, should be ready to start at any time.

5. When selecting pumps, try to combine regional conditions and give priority to products that are locally manufactured, produced in series, relatively stereotyped and have good performance.

2. When it is found that the mechanical noise of the motor increases and the temperature rise of the bearing is abnormal, the lubrication condition of the motor bearing should be checked. If the grease becomes discolored or dirty, it should be replaced in time.

3. When oil leakage is found in the sealing seat, you can loosen the screw plug on the sealing seat and run the oil pump. When oil comes out and smells like aviation oil, it can be determined that the mechanical seal has failed. Take the in-line pump out of service to quickly replace the mechanical seal.

4. How to replace failed mechanical seal:
(1) Prepare the workbench (ground) and disassembly and assembly tools for placing pump parts. Do not place them randomly to avoid damaging the pump parts.
(2) Make sure the motor is in maintenance status before disassembly; unscrew the oil filling screw plug; use a straw to suck out the lubricating oil in the seal seat cavity.
(3) Disassemble the split coupling: first unscrew the hexagon socket screws fixing the coupling, and then gently pull half of the coupling off the shaft slowly (be careful not to fall off). Use a torx wrench to unscrew the pump shaft lifting bolt and stopper, let the impeller slowly sink to the pump body, remove the other half of the coupling, and take off the pump shaft retaining ring.
(4) Remove the sealing seat: Unscrew the sealing seat compression nut, gently remove the sealing seat (note: do not break the rubber oil seal on the seat) and clean it.
(5) Disassemble and clean the bearing seat: first lightly move the bearing seat, then use the disassembly bolt to lift the bearing seat, and lift it down along the pump shaft to remove it. Use jet fuel to clean the bearing and seat, dry and dry before installation. Apply a little No. 20 mechanical oil for lubrication and protection.
(6) Disassemble the mechanical seal: Grasp the seal spring and lift it up along the pump shaft to disassemble it.
(7) Mechanical seal assembly: Apply a layer of clean No. 20 lubricating oil on the mirror surfaces of the dynamic and stationary rings: apply lubricating oil to the guide bearing seat, first gently position the static ring and install it into the guide bearing seat; then install it on the pump shaft Apply lubricating oil, and gently install the moving ring part of the mechanical seal onto the pump shaft. Push the sealing ring gently with your hand and it should be able to expand and contract freely (note that the anti-rotation surfaces of the moving and static ring parts are assembled in place).
(8) Install the sealing seat: First install the rubber oil seal on the sealing seat, then install the sealing seat into the pump cover and press it on the bearing seat, and tighten the nut.
(9) Install the coupling: first install a retaining ring on the motor shaft head, install a coupling, then install a stopper on the pump shaft end and the coupling groove and tighten the bolts with a torx wrench (lift the pump shaft 3 ~5 mm away to provide mechanical seal prestress): Install the other half of the coupling and tighten the hexagonal socket screws, which must be tightened. Correct inspection requirements for installing a coupling: the upper and lower clearance of the split coupling is even; turn the coupling several times by hand to check for flexible rotation.
(10) Perform a test run according to the key points of use to check whether the mechanical seal is replaced correctly and whether the pump unit is operating normally.

1. The structural form of the water pump has an impact on the size, structural form and internal layout of the pump room, so it has a great influence on the cost of the pump station. For example, when the water source level is very low and a very deep pumping station must be built, choosing a vertical pump can reduce the area of the pumping room and reduce the cost. For another example, there is a big difference in the layout of the suction and pressure water pipelines in the station between a single-suction vertical joint water pump and a double-suction horizontal joint water pump.

2. The normal water absorption conditions of the water pump should be ensured. Under the premise of ensuring that cavitation does not occur, the allowable vacuum height of the water pump should be fully utilized to reduce the burial depth of the pump station and reduce the project cost. At the same time, it is avoided that the installation height of each pump in the pump station is too different, resulting in uneven foundation burial depth of each pump or an increase in the burial depth of the entire pump station.

3. A water pump with higher efficiency should be selected. For example, try to use a large pump, because generally large pumps are more efficient than small pumps.

4. According to the different requirements of water supply objects for water supply reliability, a certain number of backup pumps are selected to meet the water requirements in case of accidents: when it is not allowed to reduce the water supply (such as the water supply of blast furnaces and open-hearth workshops of metallurgical plants) ), there should be two sets of backup units; when the water supply is allowed to be reduced in a short period of time, the backup pump only guarantees the supply of emergency water; when the water supply is allowed to be interrupted in a short period of time, only one backup pump can be installed. Pumping stations in urban water supply systems generally have only one backup pump. Usually the backup pump can be the same model as the largest working pump in the pumping station. If there is a sufficiently large highland pool or water tower in the water supply system, which can partially or completely replace the pumping station for short-term water supply, the pumping station does not need to be equipped with a pump, and only a set of spare units can be stored in the warehouse. The standby pump, like other working pumps, should be ready to start at any time.

5. When selecting pumps, try to combine regional conditions and give priority to products that are locally manufactured, produced in series, relatively stereotyped and have good performance.

1. The recommended installation method for pipeline pumps is vertical installation, that is, the water inlet and outlet are parallel to the ground. In some places, if other restrictions require horizontal installation (the water inlet and outlet are vertical to the ground), the power should not exceed 4KW.

2. The base of the pump should be kept as level as possible to prevent the motor bearings and shaft seals from being easily damaged by unbalanced forces. Generally, in order to prevent the accumulation of air at the water inlet end, the water outlet end can be slightly lower than the water inlet end, which can effectively prevent air from accumulating in the pump chamber and causing a lack of pressure.

3. Whether the pump is used alone or in combination with the water pump control cabinet for automatic operation, it is recommended to install inlet and outlet gate valves for water in and out to facilitate maintenance and debugging.

4. If the water outlet has a higher height upward, it is recommended to install a one-way valve or a water hammer preventer at the water outlet.

5. It is recommended to install soft connections at the water inlet and outlet of the pump to facilitate installation and maintenance and to prevent vibration from being transmitted to the external pipe.

6. The inlet and outlet pipes of the pump should have independent supports, and the weight of the pipes cannot be added to the pump.

7. The water inlet pipe of the pump must be larger than or equal to the pipe at the water outlet of the water pump to prevent the water inlet from not being able to keep up with the pressure during water supply.

8. The water inlet of the pump should not be too long, especially when the water source is lower than the pump, the length and height must be paid attention to, otherwise it will not be able to absorb water or serious cavitation will occur.

9. The end of the water inlet pipe equipped with a bottom valve should be kept vertical. If it cannot be kept vertical, the valve will not close on its own, causing water leakage.

1. The water heater cannot be used normally. If the water pressure of the water heater is not enough to work properly, there is no need to pressurize the entire household water pipe network. It only needs to be partially pressurized in the cold water inlet pipe of the water heater to solve the problem. This kind of special booster pump for water heaters is small in size, has low power consumption, and is low in cost. Usually a 50-150 watt pump is enough, and the cost ranges from 200 to 400. Generally, the flow rate can meet the 9L/min of the shower head, and the pressure can be increased by approximately 1-1.3 kg, which can fully ensure the normal operation of the water heater.

2. The water pressure is low and the water flow is too small. Low water pressure and low water flow will also seriously affect daily life, such as washing vegetables too slowly and being unable to flush the toilet. This solution is more expensive than the solution introduced in item 1 above, because the flow rate of the booster pump is much larger, and noise issues must be considered. The water pump flow rate is generally at least 1-1.5 tons/hour, and the lift should be about 15 meters (that is, it can generate 1.5 kilograms of water pressure) to have a good experience. The power of the water pump motor with this parameter ranges from about 0.37-0.55 kilowatts. The water pump The water inlet and outlet interface is usually a 1-inch threaded opening, and a 1-inch opening needs to be added to change it to a 4-point opening (household water pipes are generally 4-point). If you don’t care about noise or water pressure stability, just buy a water flow pressure differential automatic booster pump that costs 300-500 yuan; if you mind noise and water pressure stability, then a variable frequency automatic booster pump that costs about 1,500 yuan. The pump is specially designed for you.

3. No water is available during peak periods. This situation is more expensive and complicated to solve because no water enters the network during peak periods, and even if you install a booster pump, it will be ineffective. Therefore, in this case, the booster pump must be installed outdoors on the first floor to ensure a continuous boosting effect. The water pump flow rate should also be 1-1.5 tons/hour, and the head should be 15-20 meters (that is, it can generate 1.5-2 kilograms of water pressure) to have a good experience. The power of the water pump motor of this parameter is about 0.55 kilowatts, and the water pump inlet and outlet The interface is usually a 1-inch wire opening, and a 1-inch opening needs to be added to change it to a 4-point opening (household water pipes are generally 4-point). It is not recommended to buy a cheap booster pump that costs 300-500 yuan for this kind of installation outdoors, because you have to consider the impact of noise on neighbors.

1. What is a self-priming pump?
A self-priming pump is a pump that installs the self-priming pump in a place higher than the liquid level. After filling the pump body with water for the first time, the self-priming pump can be started to pump up the water and drain it away. We collectively call it a self-priming pump (currently For the first time, Boyu Pump Industry’s vacuum-assisted self-priming pump can automatically pump water up without filling it. If you need to know more, you can search on Baidu: Vacuum-assisted self-priming pump). The self-priming pump not only has the function of a self-priming pump but also It also has the function of a booster pump, so we can also call the self-priming pump a self-priming booster pump.

What are the types of self-priming pumps?
According to the self-priming height, self-priming pumps are divided into: self-priming pumps with a self-priming height within 5 meters, and self-priming pumps with a self-priming height of 6-9 meters.
Self-priming pumps with a self-priming height within 5 meters are divided into: ZX clean water self-priming pump, SFBX small stainless steel self-priming pump, GZ small household self-priming pump, ZW sewage self-priming pump, FPZ reinforced polypropylene corrosion-resistant self-priming pump, FBZ Fluorine plastic self-priming pump, WFB sealless self-control self-priming pump, CYZ self-priming centrifugal oil pump, ZCQ magnetic self-priming pump, BYQYZ gas-liquid self-priming pump, BYQSZ gas-water hybrid self-priming pump and other products.
Self-priming pumps with a self-priming height of 6-9 meters: BYZKW fully automatic self-control auxiliary self-priming pump, BYZK high suction range self-priming pump, BYGXCZX small stainless steel high suction range self-priming pump, BYQZ portable gasoline engine self-priming pump, BYXZXW large flow self-priming pump Suction pump, BYZKZX vacuum-assisted self-priming pump, BYXZXWC high-flow diesel engine strong self-priming pump, BYNMZ reversible high-viscosity self-priming pump, HMZ small household hot and cold water automatic self-priming pump and other products.

2. What is a booster pump?
A booster pump is a water pump that only functions as a booster. All pumps have a booster function. Therefore, booster pumps include a wide range of pump products. We can only describe the pumps according to popular conventions in the industry. Conventionally referred to booster pumps are divided into: household booster pumps installed and used by individual households, pipe booster pumps used for water supply by water companies or secondary water supply installations in communities, or booster pumps used for secondary boosting of factory water. Pressure pump, booster pump means a second boosting effect based on the water pressure in the original pipeline. The pressure at the pump inlet plus the pressure provided by the booster pump is the entire pump outlet pressure. Booster pumps can be installed vertically or horizontally. The most commonly used household booster pump is: WG small household booster pump. The most commonly used second water supply booster pump is: ISG pipeline centrifugal pump, ISW horizontal Type pipeline centrifugal pump or the new QDL vertical stainless steel lightweight multi-stage pump.

3. The difference between self-priming pump and booster pump
To sum up, the difference between a self-priming pump and a booster pump is that the self-priming pump has the functions of self-priming and boosting, while the booster pump only has the function of boosting. It has no self-priming ability and must have water flowing to it. It comes from inside the pump to increase the pressure.