Booster pump features and working principle

- Oct 14, 2019-

The booster pump, as its name implies, is a pump used for supercharging. Its main uses are water heater boosting, high-rise low water pressure, sauna, bathing, etc., the uppermost water pressure of the apartment is insufficient, and the solar energy is automatically pressurized. , reverse osmosis water purifier pressurization and so on.


The so-called fully automatic booster pump is actually an automatic boosting device that does not require manual maintenance and automatically starts and stops or speeds up according to your water usage. Simply put: the faucet pump starts to run, and the water consumption is reduced or the faucet pump automatically stops working. The automatic booster pump.


The booster pump has the following features:

Simple maintenance: the booster pump has fewer parts and seals, simple maintenance and low cost.


Cost-effective: The booster pump features high output performance and low cost.


High adjustability: The booster pump output pressure and flow rate are accurately adjusted by the pressure regulating valve of the driving gas.


The drive air pressure is adjusted so that the output pressure of the pneumatic line booster pump is precisely adjusted between the pre-increased air pressure and the maximum output pressure.


The output pressure is high: the maximum working pressure of the pneumatic liquid pipeline booster pump can reach 700Mpa, and the maximum working pressure of the pneumatic gas pipeline booster pump can reach 300Mpa.


Excellent material: The high pressure part of the booster pump is made of hard aluminum alloy. The high pressure plunger is made of stainless steel. It is double sealed. The material of the key parts can be selected according to the medium property.


Multiple gas drives: compressed air, nitrogen, water vapor, etc.


The output flow is large: the pneumatic pipeline booster pump only needs 0.2-0.8Mpa compression air. All "O" rings of the same series of pumps, the repair kits are replaceable with each other, greatly reducing maintenance costs. Pneumatic pipe booster pumps do not require the use of lubricants.


Flexible application: The booster pump is designed from simple manual to fully automated. The booster pump is suitable for all application areas and is compatible with the customer's system. The air motors of most models of pumps in the same series are interchangeable.


Automatic pressure holding: When working, the booster pump works quickly and reciprocally. When the output pressure approaches the set pressure value, the reciprocating speed of the pump decreases until it stops. And to maintain this pressure, energy consumption is small at this time, no heat is generated, no parts movement. When the pressure balance breaks the booster pump automatically starts working to the next balance.



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Booster pump working principle

The working principle of the booster pump should be determined according to the pump type. Common booster pumps include centrifugal pumps, plunger pumps, diaphragm pumps, rotor pumps, screw pumps, gear pumps, etc. Among them, centrifugal pumps are the most widely used booster pumps. . The following describes the working principle of several commonly used booster pumps. The centrifugal booster pump focuses on:


Centrifugal pump: The centrifugal pump rotates the water by the rotation of the impeller, so that the water is centrifugally moved out of the impeller, and the flow path of the pump continuously flows into the pipeline. If it is a multi-stage pump, the water pumped out from the first stage impeller will flow into the second stage and accelerate again. It will not flow into the pipeline until the last stage of the impeller, and the higher head will be obtained after the multi-stage impeller water. At the center of the impeller, a certain vacuum area is formed due to the liquid being pumped out, and the liquid level pressure is higher than the center of the impeller, so the liquid enters the pump through the suction line of the pump under the pressure difference. The impeller rotates continuously, and the liquid is continuously sucked in and out. Therefore, before starting the centrifugal booster pump, the pump casing and the suction pipe must be filled with water to operate normally.


Piston pump: The plunger pump is a type of positive displacement pump. It relies on the plunger to reciprocate in the cylinder to change the volume of the sealed chamber to achieve liquid absorption and pressurized liquid.


Diaphragm pump: A diaphragm pump is a type of positive displacement pump that relies on the back and forth of a diaphragm to change the volume of the working chamber to draw in and discharge liquid.


Rotor pump: Rotor pump is a kind of positive displacement pump. It consists of a rotating rotor and a stationary pump body. The relative movement between the rotor and the pump body changes the working volume, and the liquid is discharged by the extrusion of the rotating rotor. Leave space on the other side to create a low pressure that allows the liquid to be continuously inhaled.


Screw pump: A screw pump is a positive displacement rotor pump that draws in and discharges liquid by means of a volume change of a sealed chamber formed by a screw and a bushing.


Gear pump: A gear pump is a type of positive displacement pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport or pressurize the rotary pump. The two gears, the pump body and the front and rear covers form two closed spaces. When the gear rotates, the volume of the space on the disengagement side of the gear increases from small to large, forming a vacuum, sucking the liquid, and the volume of the space on the gear meshing side changes from large to large. Small, and the liquid is squeezed into the pipeline.


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Automatic booster pump classification and working principle

The automatic booster pump is divided into four types according to the control mode: water flow type, differential pressure type, variable frequency type and liquid level type. The following classifications introduce its working principle and basic characteristics.


Water flow type: The water flow type automatic booster pump is a simple booster pump with simple structure. It can easily and accurately sense when the user uses water and no water through the water flow switch. When the water is used, the water flow is impulsive to the water flow switch to energize the booster pump. On the contrary, after the water is not used, the water flow switch returns to the in-situ booster pump to stop the power. This reciprocating cycle achieves automatic operation. Water-flow booster pumps are generally small self-priming pumps that are widely used for water heater boosting. There are also some areas where large water consumption is used, such as industrial or cooling water circulation.


Differential pressure type: The so-called pressure difference is based on the pressure difference. A differential pressure control switch can easily customize the pressure value of the start and the pressure value of the shutdown. When the pressure is equal to the set starting pressure value, the control system will make the pump energized, and when the pressure rises to the set stop pressure value, the pump will be powered off by the control system and stop running. From the working principle, it is not difficult to understand that when the pipe network pressure balances the high pressure stop value and the low pressure start value, the booster pump will not start. Based on this phenomenon, the differential pressure automatic booster pump will have the typical disadvantage of pressure instability, and it is not suitable for occasions where the pressure needs to be stable. Otherwise, the water pressure may appear one big or one small or frequent start and stop and easy to burn. Seriously affect the use. However, the differential pressure automatic booster pump is not completely useless. For example, in the field of fire protection or in the field of long-time operation once it is turned on, it is also suitable for differential pressure control. After all, the overall price is lower than the inverter control.


Liquid level: The liquid level control is based on the water level difference. Simply speaking, the high water level stops to prevent water from overflowing, and the low water level starts to realize the pool water supply. The realization of the liquid level is achieved by controlling the distance between the balance switch and the switch float. The larger the distance, the larger the water level difference. The liquid level automatic booster pump and the timing and pressure difference and the variable frequency automatic booster pump described below are essentially different. It has its unique features and features, and it is irreplaceable for timing, differential pressure and variable frequency automatic booster pumps. Generally used for drainage, high and low pool hydration.


Inverter type: As the name suggests, it is a fully automatic booster pump driven by a frequency converter. The frequency conversion automatic booster pump has been developed in recent years. It is also based on a certain fixed value. Once the control system finds that the actual pressure deviates from the set pressure value, the system immediately controls the pump to replenish the pressure, and the pump runs at a speed of Water speed is related. The greater the change in water pressure, the greater the surface water consumption, and the system controls the rapid operation of the pump to achieve the purpose of replenishing the pressure; when the pressure value of the pipe network approaches the set pressure value, the system begins to control the deceleration of the pump, and the deceleration is also the same as the water. Speed is related. At this time, the smaller the water consumption, the slower the pump runs. When the water is no longer used, the system controls sleep and the pump stops. The reciprocating cycle realizes the constant pressure water supply of the variable frequency automatic booster pump.