Basic Knowledge Of Booster Pumps

working principle

First, the booster pump is filled with liquid, then the centrifugal pump is started, the impeller rotates rapidly, the blade of the impeller drives the liquid to rotate, and the liquid flows by inertia to the outer edge of the impeller, and the impeller sucks in the liquid from the suction chamber. In the impeller, the liquid flows around the blade, and the liquid acts a lift force on the blade during the bypass motion. In turn, the blade acts on the liquid with a force equal to the lift force and the opposite direction. This force works on the liquid to obtain the liquid. The energy flows out of the impeller, and the kinetic energy and pressure energy of the liquid increase.

The gas-liquid booster pump works like a pressure booster, which applies a very low pressure to the large-diameter air-driven piston. When this pressure acts on a small-area piston, it produces a high pressure. The booster pump is capable of continuous operation through a two-position five-way directional control valve. The high pressure plunger controlled by the one-way valve continuously discharges the liquid, and the outlet pressure of the booster pump is related to the air driving pressure. When the pressure between the drive section and the output liquid section is balanced, the booster pump will stop running and no longer consume air. When the output pressure drops or the air drive pressure increases, the booster pump will automatically start running until it automatically stops after reaching the pressure balance again. The single air-controlled unbalanced gas distribution valve is used to realize the automatic reciprocating motion of the pump, and the gas drive part of the pump body is made of aluminum alloy. The wetted parts are made of carbon steel or stainless steel depending on the medium. Generally, the pump has two ports of intake and exhaust. It can be called “negative pressure” at the inlet port below the atmospheric pressure (ie atmospheric pressure); it can be called “positive” at the outlet. Pressure"; for example, the vacuum pump is a negative pressure pump, and the booster pump is a positive pressure pump. Positive pressure pumps are quite different from negative pressure pumps. For example, the flow direction of the gas, the negative pressure pump is the external gas is sucked into the suction nozzle; the positive pressure is sprayed from the exhaust nozzle; such as the level of the air pressure.

Product Features

“Negative pressure pump” and “positive pressure pump” are mainly artificially distinguished from functions and main uses. "Negative pressure pump" is mainly used in places where vacuum (negative pressure) is required, such as: pumping, gas analysis, gas circulation, gas sampling, vacuum adsorption, indirect water absorption, etc.; and "positive pressure pump" is mainly used for needs. The pump is used as a power to carry out gas transfer, pressurization of a closed container, inflating and inflating, indirect water pressure, etc., which are commonly used in medical, scientific research, environmental protection, instrumentation, control, and the like.

The "negative pressure pump" has a positive pressure at the exhaust end, but it is a micro-positive pressure, which is much smaller than the output pressure of the "positive pressure pump". For example, the micro vacuum pump VM, VAA, PC, etc. are "negative pressure pumps". ", "inhalation pump", and their exhaust end pressure is often only a few kilopascals (KPa); "positive pressure pump" suction end is also slightly negative pressure, in order to complete the pumping effect.

The gas booster pump series is a two-stage booster pump that can increase the pressure of very low pressure gas to a very high pressure. The driving pressure is ≤7bar, the pressure of the gas input port is 0.5-10 bar, and the maximum can be increased to 90Mpa. The reversing mode of this series of pumps is exactly the same as that of the N series. The whole pump is made of aluminum alloy and stainless steel. In the gas drive section of the pump, the series requires a lubricated gas to lubricate the seals and other internal parts. The pump has a drive piston diameter of 160 mm. The gas booster pump series is a single-stage booster pump. The input pressure of the pressure gas input port requires a certain degree of preload, and the pre-increased pressure varies depending on the maximum pressure of the gas booster pump picture. The maximum pressure can be increased to 80Mpa.

The gas booster pump H series uses a single air-controlled unbalanced gas distribution valve to achieve reciprocating motion of the pump, all made of aluminum alloy and stainless steel. All seals are imported high-quality products, the maximum design drive pressure is 10bar, in order to ensure the life of the pump, it is recommended to drive the pressure <8bar. The pumps have a drive piston diameter of 160 mm and are single-acting pumps, all with single-acting pumps with exhaust cooling. The reversing mode of this series of pumps is exactly the same as that of the B series, and the flow rate is doubled compared with the B type.

Mechanical installation

When installing the tap water booster pump, be sure to install it horizontally or vertically in the “Installation Mode” display. The direction of the water flow should be the same as the direction of the arrow on the pump body, and install it as far as possible from the lowest position of the water level. For ease of use and maintenance, a valve should be installed on the pump inlet line. When the pumped liquid level is lower than the upper end surface of the impeller of the pump or the shaft of the pump, the pump should be installed with a check valve, and the outlet end is connected with a three-way for water diversion. The pump should be filled with water for the first time. Tighten the plug. The pipe connection should be tight, especially if the water inlet pipe cannot leak, otherwise the pump head will be lowered or the water will not be pumped. Do not rotate for a long time before the water is introduced into the pump chamber to avoid damage to the seals.

A safety protector is installed in the motor coil. When the pump fails or does not pump water, the motor can be automatically disconnected when the temperature rises above the specified value. After the temperature rise of the motor is removed, the motor can automatically resume operation. The booster pump motor is a capacitor-operated motor. The direction of rotation of the pump is adjusted when it leaves the factory. If you need to replace the capacitor or re-wire, please press the arrow on the pump body to mark the wiring. To ensure safe use, you must use a three-wire safety socket with a grounding wire. When the pump is leaking, immediately stop the machine to prevent internal leakage. If the water is connected to the motor, replace the mechanical seal. Check if the power is on. Use the power supply voltage to match the operating voltage of the pump. If a and b are normal, please remove the pump, open the pump cover, remove the foreign matter in the pump, and then install the pump cover, and adjust it to normal.

When the pump is not pumping water, the pump is installed on the water pipe. If the tap water level is below the plane (horizontal installation) or center line (vertical installation) of the impeller of the pump, the power should be turned off at this time, and the water level of the tap water should rise more than When the impeller plane or center line is turned on, turn on the power to avoid damage to the mechanism (automatic type does not need to be turned off). When the pump is used to pump well water, please check whether the water inlet pipe is leaking; if there is not enough water in the pump cavity, it should be filled with water, and the suction stroke is too high, and it should be adjusted properly. Check if the inlet and outlet pipe diameter is too small or blocked. After the automatic type of use for a period of time, automatic failure may occur, mainly due to the long-term precipitation of metal such as steel rust in the water pipe. After the power is turned off, the switch is removed, the upper screw is unscrewed, the plastic piece is taken out and cleaned, and then , according to the original reset, debugging is normal, you can reuse.