The filter should be installed before the vacuum pump, and the role of the filter element of the vac

The filter should be installed before the vacuum pump, otherwise the impurities sucked in by the vacuum pump inlet into the pump body will cause the vacuum pump to be stuck and damaged.

It depends on the range of use of your vacuum pump

The filter installed in front of the vacuum pump is called the air intake filter, which mainly filters the impurities in the suction to prevent the impurities and dust in the pump chamber from adhesion, affecting the performance of the vacuum pump and even affecting the production.

The function of this machine filter element is as follows:

1. Prevent solid particles from entering the vacuum pump: The filter element can filter out the solid particles in the air, such as dust, sand, fiber deficiency, etc., prevent them from entering the vacuum pump, and reduce the wear and failure of the vacuum pump.

2. Filter out liquids and oil mist: In some applications, the gas may carry liquid particles or oil mist, and if these liquid particles or oil mist enter the vacuum pump, it will have a negative impact on the sealing performance of the vacuum pump. The filter element effectively removes these liquids and oil mist and keeps the vacuum pump in good working order.

3. Improve the work efficiency of the vacuum pump system: By filtering out the impurities and particles in the air, the filter element can keep the vacuum pump system clean, improve the exhaust efficiency of the vacuum pump, and improve the work efficiency of the entire vacuum pump system.

4. Maintain the stability of the vacuum level: The filter element can prevent impurities and particles from accumulating inside the vacuum pump, maintain the cleanliness of the system, so as to maintain the stability of the vacuum degree and ensure the stable operation of the vacuum pump for a long time.

Installation steps of centrifugal pump vacuum: 1. Confirm the location of the centrifugal pump and clean up the surrounding environment, and stabilize the equipment. 2. Install the centrifugal pump on the pre-prepared bearing, if it is a floating centrifugal pump, Kaizheng should make an isolation vibration bracket to avoid unnecessary vibration of the equipment and affect the vacuum effect.

3. Connect the vacuum pumping pipeline and add a check valve to prevent excessive vacuum leakage and affect the evacuation efficiency. 4. Connect the corresponding drive equipment and install it! 5. Start the equipment, introduce water or steam, and make the vacuum pumping efficiency meet the late key requirements of the vacuum vessel.

Hello dear to your questions, we will help you answer, centrifugal pump installation and vacuuming are generally carried out according to the following steps: 1. Carefully install the centrifugal pump to ensure that the machine is stable in the bracket, the voltage is stable in power supply, and the dry air pipe is emptied; 2. Connect the trachea, open the trachea valve, open the air switch, and test the middle connection part with water; 3. Start the centrifugal pump and adjust the speed to ensure stable and bright operation; 4. The hose is connected to the vacuum connection port of the centrifugal pump outlet and the vacuum equipment; 5. Close the pressure relief valve, open the pump outlet, observe the change of vacuum degree, and adjust it according to the actual requirements; 6. Continue to pump for 30 minutes, normal operation; 7. Use a filter, it is recommended to use a molecular sieve filter; 8. After the vacuum is completed, the pressure relief valve should be turned off and the operation of the centrifugal pump should be stopped.

1. Installation of pumps and motors of vacuum pump accessories: When installing pumps and motors of vacuum pump accessories, before installing the vacuum pump and compressor, turn the coupling by hand to confirm whether there is card letter and other damage in the pump.

2. Pipeline installation between vacuum pump and gas-water separator: the exhaust pipe of the vacuum pump or compressor is connected to the inlet pipe of the gas-water separator, and the gasket should be used to make it reliably sealed at the flange connection of the pipeline, and the inlet pipe of the vacuum pump or compressor should be equipped with a reservoir valve, and a pressure gauge should be installed between the exhaust pipe and the valve.

3. Installation of gas-water separator of vacuum pump accessories: The gas-water separator is installed on the foundation according to the outline drawing.

There are 3 roles of vacuum pumps in the maintenance of refrigerator refrigeration systems:

The non-condensable gas remaining inside the refrigeration system during maintenance is extracted, and the system is vacuum and dried.

Vacuum leakage detection of the system and detection of the vacuum status of the system in the form of negative pressure.

Prepare for refrigerant filling.

The vacuum pump used in the maintenance of the refrigerator refrigeration system is a rotary vane type (Figure 5-27).

Figure 5-27 Rotary vane vacuum pump.

a) Appearance (b) Schematic diagram of internal structure 1Air intake 2Eccentric rotor 3Rotary vane 4Spring 5Pump body 6Exhaust outlets.

How to use the vacuum pump: Before using the vacuum pump each time, check whether the lubricating oil level in the pump meets the requirements to ensure safe use. Use a fluorinated tube to connect the air inlet of the vacuum pump with the three-way maintenance valve on the process pipe of the refrigerator refrigeration system, and open the three-way maintenance valve to the maximum to start the vacuum pump.

During use, observe whether there is air leakage at the interface between the fluorinated tube and the air inlet of the vacuum pump. After the purpose of vacuum pumping is achieved, the valve of the three-way maintenance valve is closed, and then the interface between the fluoridation pipe of the three-way maintenance valve and the air inlet of the vacuum pump is slightly loosened.

Daily maintenance: When the vacuum pump is out of use, the air inlet and outlet ports should be plugged with plastic plugs to prevent air and dust from entering the pump and affecting its use; The environment in which the vacuum pump is placed should be dry, ventilated and clean; The fluoridation tube connected between the vacuum pump and the refrigeration system should be as short as possible to avoid problems such as discounts and affect the use.

First of all, the equipment should be placed in a horizontal, ventilated and dry place, and the vacuum unit suction port should be connected with the pumping system, and the seal must be tight, and there should be no leakage point. Check whether the oil level in the vacuum pump and roots pump and the lubricating oil in the oil cup meet the requirements, and connect the power cord and grounding wire. Check for other unsafe features.

Adjust the delay of the booster pump according to the actual situation (through the time relay, the adjustment range is 1-6 minutes). Turn on the booster pump circuit breaker, press the booster pump control button, the booster pump indicator light will be on, and the booster pump will run at the same time. There is an oil level switch in the oil well, and the buzzer on the control panel will automatically alarm when the oil well enters the vacuum pump oil or transformer oil, and the system will be shut down at the same time.

Close the high vacuum butterfly valve, turn off the mechanical booster pump, turn off the vacuum pump, press the emergency stop button, control the power supply off, turn off the main power circuit breaker. When the control mode is converted to the automatic position through the knob on the control panel, the device will automatically control the shutdown and start of the vacuum pump and the mechanical booster pump through the preset control points of the vacuum relay.

5. For three-phase motors, it should be noted that the direction of rotation of the motor should be consistent with the direction of the arrow on the pump support. Or before connecting the pipeline, first wire test and then block the air intake with your hand to see if there is suction, if there is suction, the wiring is correct, otherwise you can change the steering of any two wiring (note: when determining the steering of the three-phase motor, it must be carried out instantaneously);

Vacuum pump installation:

The vacuum pump should be installed in a place with a solid ground, and there should be sufficient room around it to facilitate inspection, maintenance and maintenance.

The foundation should be kept level under the base of the vacuum pump, and it is recommended to pad the shock-absorbing rubber at the four corners of the base or cast it with bolts to ensure that the vacuum pump runs smoothly and the vibration is small.

The connection pipeline between the vacuum pump and the system should be sealed reliably, the small vacuum pump can be connected with metal pipes, the sealing gasket can be made of oil-resistant rubber, and the small vacuum pump can be connected by vacuum hoses, and the diameter of the pipeline shall not be less than the suction caliber of the vacuum pump, and the pipeline is required to be short and less elbows. (When welding the pipeline, the welding slag in the pipeline should be removed, and the welding slag should not enter the vacuum pump cavity.) ）

In the connecting line, the user can install a valve and a vacuum gauge above the air inlet of the vacuum pump, and the ultimate pressure of the vacuum pump can be checked at any time.

Connect the power supply according to the motor label, and connect the ground wire and install the fuse and thermal relay of appropriate specifications.

When the vacuum pump is energized and put into trial operation, the motor belt must be removed and the vacuum pump must be confirmed to be in the specified direction before it can be put into use, so as to prevent the vacuum pump from reversing and injecting fuel. ** Direction indicated by the protective cover).

For vacuum pumps with cooling water, switch on the cooling water according to the regulations.

If the solenoid valve is installed at the vacuum pump port, the valve and the vacuum pump should operate at the same time.

When the exhaust gas of the vacuum pump affects the working environment, the exhaust port can be installed with a pipe to lead away or install a mist filter.

Vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to pump air from the pumped container to obtain vacuum. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in an enclosed space. According to the working principle of vacuum pumps, vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transfer pumps.

It is widely used in metallurgy, chemical industry, food, electronic coating and other industries.