A traditional diffusion pump belongs to a large category of vacuum units that are used to create specific operating conditions. A key feature of such products is that they do not have any pressure limitation. Today, such a technology is not considered fully understood, as experts have not yet had time to conduct a sufficient number of studies. But many experts argue that the principle of operation of diffusion pumps allows to achieve the highest performance indicators.
Description
When working with various units, the quality of the final result often depends on knowledge of the basic principles of operation of a diffusion pump. Depending on the base element installed in the vacuum unit, even with a slight change in pressure in the pipes, both steam jets of mercury and oil can be used. The total effectiveness of each product is different individual indicators.
The principle of operation of the diffusion pump is based on the capture and subsequent transportation of gas particles that penetrate into the internal compartment through small openings leading to the nozzle. Next to the name, manufacturers often indicate a displacement. For example, the H400 diffusion pump model indicates that the product needs four hundred liters of water to operate.
Characteristic
Regardless of the displacement of the used coolant, the diffusion vacuum pump is distinguished by the principle of operation, which is absolutely identical for all models:
- The installed steam discharge element consists of powerful aluminum four-stage nozzles, which are equipped with small clearances for nuts and expansion washers.
- To reduce the loss of working fluid in the outlet pipe, manufacturers have provided for the presence of a universal oil deflector.
- Copper pipe heaters are subject to stable heating, as they are partially located in the working fluid. The heat generated during operation is transferred to the charged substance.
- In order to qualitatively eliminate the process of the back hit of the displaced gas particles, an oil deflector is placed above the topmost nozzle. The unit is cooled by water.
Classic steam-oil diffusion pumps can be used in combination with any refueling means. It can be not only vapors, but also gases that do not act destructively on the unit itself. In order to use the product at full capacity, it is necessary to equip it with a foreline type pump, which is installed exclusively at the outlet of the nozzles. High-quality oil for diffusion pumps ensures the smooth operation of the entire system.
Principle of operation
The diffusion pump NVDM in its specificity is more like a classic ejector. A similar situation is with the principle of operation, which is a kind of diffusion of the pumping gas (outwardly it looks more like a jet of steam). When the condensation process comes to its logical conclusion, the gas gradually leaves the unit, which does not affect the vacuum level in the internal compartment at all. Timely pumping is carried out by activating the installed pump. The use of a durable and reliable nozzle allows several times to increase the level of productivity, increasing the efficiency of the unit.
Terms of use
Today, the universal principle of operation of a diffusion pump is actively used in various industries. The correct approach to the operation of the unit can significantly improve performance indicators. Extensive functionality is highly appreciated by experienced professionals. The equipment is most often operated in the following industries:
- Metallurgy.
- The medicine.
- Mass production.
- Oil industry.
The management of all these industries is interested in purchasing steam-diffusion diffusion pumps. If all the functionality of the unit is used as intended, then you can increase the performance indicators of the entire enterprise. Everyone can buy the unit. You only need to understand that there are a number of certain criteria that should be considered by both specialists and beginners. The main thing is that all installed products are compatible with each other.
Popular manufacturers
Experts identify several trade brands whose products are most popular among modern consumers. The most popular are:
- Erstevak.
- Intek Analytics.
- MSH Technology
Each of these companies professionally produces a wide range of products. The total cost of the diffusion pump varies depending on what kind of operating characteristics the unit is endowed with. More expensive models are designed to create a deep vacuum.
Universal NVDM products
You can buy an oil-diffusion pump in any specialized store that sells expensive and high-quality equipment, characterized by excellent technical parameters and a coordinated principle of operation. If a beginner cannot make the right choice, then it is best to consult a professional. To solve standard problems, you can buy a diffusion pump N 250, which is suitable for both domestic needs and for installation in organizations.
The multifunctional device will become an excellent assistant in any modern production, as it is not only distinguished by good power, but also by a high degree of productivity. You should never rush with a purchase, as you can buy a low-quality fake. More advanced pumps have found their application in the chemical, oil, and food industries. Those enterprises that are professionally engaged in the sale of such units must provide customers with a warranty card. Only in this case can one be completely sure that the purchased pump will not fail in the first week of active use.
Scheme
Studying the detailed documentation of a diffusion pump, even a novice can understand that the principle of the unit is quite simple. Positive characteristics are achieved due to the fact that the product has a clear sequence of actions:
- The steam heated in the tank gradually moves along the main pipe.
- At the point of connection with a small capillary tube, it interacts with the main working fluid, which boasts low elasticity.
- Particles of gas are captured, after which the steam transfers them to an equipped trap, consisting of a cooling oil deflector. Due to this, condensation settles.
- The installed fore-vacuum pump pumps out all unnecessary.
An insufficient pumping rate most often indicates a lack of consumed water. The total efficiency of the gas outlet, which is ensured by the steam jet diffusion pump, largely depends on the shape of the installed nozzles. Flat products can improve the quality and speed of pumping.
The lineup
Modern manufacturers produce a huge number of different diffusion pumps, which differ from each other in operational characteristics, as well as price. All of them are unique in their own way. But there are several models that are in great demand at large production sites. The H 100 unit is notable for its low power and low price. Such products are common in the household industry, where there is a lack of low performance.
The middle class is the H 250 model, which can be periodically used in large enterprises. The main thing is to choose the most suitable operating conditions. The H 400 diffusion pump has optimal performance. Large factories use such units in serial production, where they can show their full potential.
Benefits
The operation of the diffusion pump can be compared with a household vacuum cleaner, which builders are actively using to whitewash rooms. Small gas molecules are eliminated due to the strong flow created by the working medium. The great popularity of such products is associated with numerous advantages:
- Pumping speed is at the highest level.
- The unit can be used even for domestic purposes, since the product does not need to be additionally cooled with liquid nitrogen.
- Long service life.
- Affordable price.
- Mutual overlapping of surfaces, due to which high-quality pumping is ensured.
- Consistently high performance designs.
If you need to create a certain vacuum at the production site and maintain it continuously, then for these purposes diffusion steam-oil pumps are ideal, which can be safely used for pumping air, various vapors and gases. If the consumer takes into account all technological requirements and environmental features, the production process will be carried out without any violations and with high performance indicators.