Complete selection of rotary evaporator

What are the important performance indexes of rotary evaporator? The selection of rotary evaporator is important for the air tightness of the instrument, which is related to the normal use of the instrument and the service life of the instrument Air tightness is closely related to the design level, manufacturing level and materials of different brands It can be measured by "reaching vacuum degree" and "vacuum holding time" What vacuum pump is suitable for evaporator? Vacuum pump is a necessary product for rotary evaporator Evaporation boiling point organic solvents usually have low vacuum degree requirements (below 4kp) Water circulating vacuum pump or tetrafluoromembrane pump (the latter is expensive) can be selected Evaporation of high boiling point materials usually requires high vacuum degree (more than 0.4kp) Mechanical vane pump can be selected However, due to its lack of corrosion resistance, it must be protected by cold well or other methods At the same time, intermittent air extraction can prolong the oil change period in operation Does the power of the bath affect the evaporation rate? It has a great influence, especially for the substances with high latent heat of evaporation (such as water) During gasification, a large amount of heat energy should be absorbed, and the fast evaporation speed is almost proportional to the high heating power Is there any way to save energy for large evaporator? The power of 50L rotating evaporator bath is 9kw, and that of 20L rotating evaporator bath is 5kW When multiple sets are used together, power supply is often a problem The selection of steam heating device is an effective scheme for energy saving What's the difference between window lifting and bath pot lifting? Relatively speaking, the rise and fall of the bath pot is safer, and the glass is not easy to be damaged Moreover, it is not necessary to lock after lifting, and the operation is more convenient than window lifting Is the electric lifting function important? It's a icing on the cake function In terms of cost performance, safety and failure rate, most of the lifters are dynamic lifters, and those with explosion-proof requirements hardly consider electric lifters What to do when the tap water temperature is not low enough to condense? In summer, the temperature of tap water is close to 30 ℃, and the solvent with steam temperature below 30 ℃ can hardly be recovered There are the following mulberry schemes to choose from: 1 In place scheme is to choose a low-temperature cooling water circulating pump with cooling capacity matching, and pay attention to "cooling capacity" is more important than "low temperature" when selecting and matching 2 The minicomputer (below 5L) can be equipped with "cold trap" to cool with ice, which costs less but needs to add ice by hand 3 Reduce the vacuum degree and increase the steam temperature at the expense of evaporation speed when the bath temperature is constant