Precautions for switching on and off roots vacuum pump

In fact, if the roots vacuum pump is switched on and off in an incorrect way, it will have a great loss impact on the roots pump equipment. For a long time, it will seriously affect the normal use of the equipment and even reduce the service life of the equipment. Therefore, you must pay attention to some relevant matters when switching on and off roots pump equipment to avoid wrong operation, such as:
1. Power on. Roots vacuum pumps are generally used in conjunction with the previous stage pumps. Except for multistage, wet and air-cooled Roots pumps, equipment damage caused by excessive differential pressure shall be avoided. Therefore, before starting the roots pump, start the front stage pump, open the valve on the pre pumping pipeline of the front stage pump and the inlet and exhaust valve of the roots pump, close the valve on the pre pumping pipeline after the pressure in the system reaches the allowable inlet pressure of the roots pump, and then start the roots pump.
2. Shutdown shutdown. First, close the air ballast valve of the front stage oil seal mechanical pump, then close the inlet valve of Roots vacuum pump, and then stop roots pump first and then the front stage pump. Do not mistake the shutdown procedure. While stopping the front stage pump, immediately vent the air at the air inlet of the front stage pump and close the cooling water inlet valve.
Therefore, it is necessary to operate according to the correct mode of switching on and off, and pay more attention not to make mistakes in the operation steps of switching on and off, otherwise the wrong operation sequence will not only lead to the failure of switching on and off, but also have a great adverse impact on Roots vacuum pump. And Xiaobian suggests that you can take relevant maintenance measures after each use of roots pump equipment, so as to prolong its service life.

heat treatment of vacuum pump for precautions 

Scaling of vacuum pump unit and Revelation of preventive measures

Scaling is often found in the use of vacuum pump unit. The scaling of vacuum pump unit is caused by the influence of water quality and operating temperature. In the face of this phenomenon, we should carry out scaling treatment in time. Here are the measures to prevent scaling of vacuum pump unit.
1、 Wash the pump body of vacuum pump unit regularly
The pump body drainage gate valve can be used to drain the accumulated water in the pump normally. During operation, the water pressure of the pump body can be used to wash the dirt and water slag in the pump regularly. On the one hand, it can prevent the dirt from accumulating, on the other hand, it can also prevent the water slag from converting into scale, resulting in the scaling of the vacuum pump unit.
2、 Hardness of circulating cooling water
1. Most of the circulating water systems are open circulating systems with high return rate.
2. When ion exchange equipment is not used for water treatment, a water storage tank and a high-level water tank are generally used to supply water to the unit. Managing the water quality according to the water quality standard of hot water boiler can prevent scaling and corrosion of vacuum pump unit.
3、 Temperature control of circulating cooling water
1. The difference between the water temperature in the vacuum unit and the water temperature in the storage tank is an important factor leading to scaling. Therefore, during the operation of circulating cooling water, the return water temperature and return water volume of the pump shall be monitored to ensure that the normal water supply and return water temperature of each pump shall not exceed 40 ℃.
2. The water supply can be controlled by valves. If the return water temperature exceeds the regulations, supplement low-temperature cold water or use other cooling methods to reduce the temperature of the water in the water storage. Increasing the circulating water supply and improving the cooling effect is an important guarantee to limit the scaling speed of the vacuum pump unit.

Liquid Ring Vacuum Pumps Used in Steel Foundry in Mexico 

How to confirm the initial state of Roots vacuum pump

 Whether it is the product of life or machinery, it can not exist in a state form in this life. The state is always changing at any time. When we determine the use state of the equipment, we can better control it. After the initial state of Roots vacuum pump is confirmed, our next work can be carried out well.

The roots vacuum pump is equipped with an eccentric rotor with fixed blades to throw water (liquid) to the stator wall. The water (liquid) forms a liquid ring concentric with the stator. The liquid ring and the rotor blades form a rotary variable volume vacuum pump with variable volume.
The roots vacuum pump is in the state of no process medium. Confirm that the coupling is installed, the protective cover is installed, the mechanical, electrical and instrument of the roots vacuum pump are confirmed, the pump turning is uniform and flexible, the inlet filter is cleaned and installed, confirm that the cooling water is led to the pump, confirm whether the lubricating grease is qualified, confirm that the lubricating grease of the bearing box has been filled, and confirm that the inlet and outlet valves of the pump are closed, Confirm the state of the pump motor switch and whether the pump motor is powered off.
It can be seen that these confirmations can actually be a form of inspection. The above confirmations are related to the roots vacuum pump in many places, so that we can better ensure the development of our work.

SV300 Rotary Vacuum Pump Used In pharmaceutical industry In Peru 

Measures to prevent oil return of vacuum pump

With the continuous development of modern industrialization, we use vacuum pumps more and more frequently. Oil return often occurs during use, which has also caused some troubles to our enterprise's development and production. Next, I will analyze the measures to prevent oil return of vacuum pump:
1. The static sealing part of shaft seal shall be firm and replaced in time.
2. Move the oil tank and exhaust valve to the side to reduce the oil level and reduce the amount of oil.
3. The plane of the vacuum pump base shall be flat, and the valve plate shall be elastic.
4. Separate the oil near the exhaust valve from other oil, and the oil level is only slightly higher than the partition wall.
5. Add a pipe into the oil hole so that the oil level is only slightly higher than the oil inlet.
6. The check valve mechanism of the vacuum pump is set to automatically close the oil inlet hole when the pump is stopped.
7. Set the oil pump and auxiliary mechanism to cut off the oil circuit when the pump is stopped.
8. Its pump port is equipped with an inflation valve.
For the above small series, we provide measures to prevent the oil return phenomenon of vacuum pump. In the ordinary actual operation and use, doing these work well can effectively avoid the oil return phenomenon and ensure its normal operation.

Dry screw vacuum pump for pure vacuum process 

Domestic vacuum pump replacing import is becoming a trend

 

At present, the dry vacuum pump is still in its infancy in China, and domestic substitution for import will become a trend in the future. Dry vacuum pump will have a great effect on the yield of the process. It is also a trend for dry pump to replace the existing water pump and oil pump.
During the maintenance of the vacuum pump, it is found that the pump is full of water. Under normal circumstances, the pump should be oil. While vacuumizing, the pump also pumps water into the pump, resulting in a large number of oil-water compounds. When the pump is working, the presence of a large amount of water increases the load of the pump, and the pump will have problems in the long run.
The vacuum drying oven has requirements for the materials to be dried. One is that it cannot contain a large amount of water, and the other is that it cannot contain organic compounds. They will be pumped into the body while vacuumizing, resulting in a series of adverse reactions and affecting the service life of the pump. If the material contains water or organic solvent, liquid water filter and condenser must be added to play a filtering role. While using the vacuum drying oven, we must also strengthen the maintenance of the vacuum pump, timely change the oil for the vacuum pump and prolong its service life.

The 13th Shanghai International Chemical Pump、Valve & Pipeline Fair 

Pneumatic diaphragm pump accessories

Pneumatic diaphragm pump is a new type of conveying machinery, which is a kind of pump in China. Compressed air is used as the power source. It can be used for all kinds of corrosive liquids. The pneumatic diaphragm pump has four materials: engineering plastic, aluminum alloy, stainless steel, cast iron and fluorine lining. No matter what material the pump is made of, the pneumatic diaphragm accessories will be damaged and need to be replaced. What are the pneumatic diaphragm pump accessories and what is the name of the pneumatic diaphragm pump accessories? The following is a detailed description of Longyang pump valve according to the physical drawing of pneumatic diaphragm pump accessories.
It can be seen from the above table that the accessories of pneumatic diaphragm pump mainly include: diaphragm, sealing ball, sealing seat, auxiliary shaft sealing ring, auxiliary sliding block, piston, piston sleeve, connecting rod shaft, sliding block, sliding plate, cover plate gasket, O-ring, y-o-ring, butterfly O-ring, etc. Let's see what they look like through the physical drawing of pneumatic diaphragm pump accessories, so as to facilitate our later purchase. Here we recommend you to take a look at the use method of pneumatic diaphragm pump to help the service life of pneumatic diaphragm pump accessories.
The above is the detailed description of the accessories name of the pneumatic diaphragm pump and the accessories drawing of the pneumatic diaphragm pump. When the diaphragm pump is used to a certain extent, we need to replace its accessories and vulnerable parts, especially the diaphragm plate needs to be inspected or replaced regularly. The pneumatic diaphragm pump is equipped with 2 F46 diaphragms and 2 mountain rubber diaphragms, which are replaced at the same time, This helps to improve the working efficiency of the diaphragm pump.

Roots - Piston Vacuum Pump Package Used In Fruit freeze dryer 

Noise transmission path of brake vacuum pump

 Vehicle NVH performance mainly refers to the noise, vibration and discomfort directly felt by the drivers and passengers in the vehicle during driving, also known as sound vibration roughness. Vibration and noise are often inseparable and occur at the same time. Excessive vibration will cause damage to the engine and vehicle parts; Noise is generally caused by vibration, which not only pollutes the environment, but also makes drivers and passengers tired; Acoustic vibration roughness refers to the discomfort directly felt by the drivers and passengers by the vibration and noise in the vehicle. The vibration in the vehicle mainly refers to the vibration generated during the operation of the engine and its accessories and power transmission system and the vibration generated by road excitation, which is transmitted to the steering wheel through the tire, suspension and suspension system through the frame and body The floor and seats are perceived by the personnel in the vehicle. The noise in the vehicle mainly comes from two aspects:

First, the combustion noise and mechanical noise generated during the operation of the engine and its accessories, the friction noise and wind excitation noise between the tire and the ground during rolling are transmitted to the vehicle through the air medium;
The second is the structural noise induced by the vibration generated by the chassis, body and other structural parts due to the excitation of the engine powertrain and uneven road surface. The noise generated during the operation of the brake vacuum pump is directly transmitted by the solid, transmitted to the body through the engine compartment, radiated to the vehicle through the structure, and perceived by the personnel in the vehicle. After stepping on the brake pedal in the state of low-voltage power supply, When the brake vacuum pump starts to work, the working noise generated by the vacuum pump is large, and the inflation noise of the vacuum pump can be clearly heard in the vehicle

high-vacuum flapper valve Used In extracting the CO2 Application 

If you want to use vacuum pump oil better, you must understand this knowledge

 

1. The oil loading window must be dirty and pickled. It is strictly prohibited to be exposed to the sun and stored in the open air. It should be stored in dark, dry and ventilated places to prevent the mixing of water and dirt.
2. When taking or loading oil, the drizzle around the barrel cover must be removed to prevent sundries from mixing into the oil and causing wear of the pump.
3. On the contrary, the vacuum pump oil of different brands and types shall not be mixed, and the old and new bamboo weaving shall not be mixed.
4. The vacuum pump shall be full capacity to prevent the extraction of solvent, steam and corrosive gas. It must be checked and changed frequently when it is used.
5. It is lenient to prevent vacuum oil from mixing with other smooth oil, and not to mix with light bamboo weaving. Whether it will be unnecessary to have vacuum performance.
6. When changing the oil, drain all the bamboo woven used in the pump body, pour in the new oil, slowly rotate the pump shaft, sweep the pump cavity, drain the residual oil, wash it repeatedly for several times, and replace it with new oil after cleaning.
7. When mineral oil is exchanged with ester oil or other decomposed oil, the pump shall be disassembled for bottom cleaning. All components must be immersed in ester oil to prevent purification.
8. The refueling appliance must be equipped with facilities and should not be a container containing other bamboo or solvents; Pump.
9. When overhauling the pump, be sure to clean and marinate all components of the pump with solvent or detergent, and dry the components.
10. If chemical gas and solvent are inhaled and vacuum is not necessary for pump oil purification, it must be cleaned and replaced.
11. During oil change: A. when the vacuum of pump oil falls and cannot meet the needs; b. When the pump oil becomes dark and brown, the oil should be changed.

Do you know the role of dry screw vacuum pump in gasoline industry ?