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Yang Mai

Yang Mai
Rotary evaporator selection and vacuum, temperature setting method

Rotary evaporator selection and vacuum, temperature setting method

The basic use conditions of rotary evaporator are: heating bath temperature 60℃, vacuum degree 95～98 kPa (absolute pressure 2～5 kPa), cooling medium temperature 20℃. The range of working parameters is: heating bath temperature ≤ 80 ℃, vacuum ≤ 98 kPa (absolute pressure ≥ 2 kPa), cooling medium temperature -20 ℃ ~ room temperature. The condenser of rotary evaporator has two kinds, vertical and oblique, and there is no difference between its heat transfer and flow process. Because the vertical type occupies less space, the general rotary evaporator adopts the vertical condenser.

24

2018

/

12

What are the product features of the Hot & Cold Cycle Unit?

What are the product features of the Hot & Cold Cycle Unit?

Configure RS485 communication interface and Modbus RTU protocol. Compact design, beautiful and space-saving. Customised solutions can be provided according to different application requirements.

02

2021

/

07

Selection of high and low temperature refrigeration integrated machine

Selection of high and low temperature refrigeration integrated machine

There are many kinds of refrigerants for high and low temperature refrigeration integrated machine, which are classified into single refrigerant and mixed refrigerant according to the composition of refrigerant. According to the chemical classification of refrigerant substances, there are mainly inorganic substances, Freon and hydrocarbon mixtures. According to the source of substances, there are natural refrigerants and synthetic refrigerants.

02

2021

/

07

High and low temperature explosion-proof machine why choose shielded pumps, and magnetic pumps and centrifugal pumps have what is the difference?

High and low temperature explosion-proof machine why choose shielded pumps, and magnetic pumps and centrifugal pumps have what is the difference?

High and low temperature explosion-proof all-in-one machine as the most common movement equipment in industrial production, high temperature and low temperature circulating tank used in high temperature and low temperature all-in-one machine and pumps have more and more demanding occasions under the use of higher and higher conditions. Shielded pumps are more and more widely used in chemical plants, because it does not have a shaft seal and can not achieve no leakage. Some people ask, what is the difference between shielded pumps, magnetic pumps and centrifugal pumps? The fully sealed or leak-free construction of shielded pumps makes them most suitable for pumping flammable, precious, corrosive and toxic liquids. Because shielded pumps do not leak, they contribute to the safety of flammable liquid systems:They have significant economic results for expensive corrosive liquids.

02

2021

/

07

Chemical glass condenser operating instructions and precautions

Chemical glass condenser operating instructions and precautions

Coil condenser is prohibited to be used horizontally. Rubber or plastic tubes with an inner diameter less than or equal to ≤20 mm should be used to minimise all kinds of external stresses generated during installation. At the same time, strong vibration caused by stirring and negative pressure pumping should be avoided. Also note that the gas phase cannot flow in the same phase as the cooling water. After installation, slowly drain the water first, then open the water valve, and wait for the outlet to see water before slowly warming up. When using, do not allow a sudden lack of water or sudden sharp rise, the diameter of the outlet pipe is larger than the diameter of the inlet pipe. It is recommended to have the conditions of zui can make good use of the downstream negative pressure into the water, not only can reduce the pressure of the coil, but also can prevent the coil in the over-temperature and over-pressure process of sudden damage to the kettle after the water into the kettle.

02

2021

/

07

The use of coiled glass condensers

The use of coiled glass condensers

Coil condenser is prohibited to be used horizontally. Rubber or plastic tubes with an inner diameter less than or equal to ≤20 mm should be used to minimise all kinds of external stresses generated during installation. At the same time, strong vibration caused by stirring and negative pressure pumping should be avoided. Also note that the gas phase cannot flow in the same phase as the cooling water. After installation, slowly drain the water first, then open the water valve, and wait for the outlet to see water before slowly warming up. When using, do not allow a sudden lack of water or sudden sharp rise, the diameter of the outlet pipe is larger than the diameter of the inlet pipe. It is recommended to use downstream negative pressure water supply, not only to reduce the coil pressure, but also to avoid overheating and overpressure when the coil is suddenly damaged after the water into the kettle.

02

2021

/

07

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