Laboratory Rotary Evaporator
(1)1L/2L---Manual lifting with irony base/Manual lifting with SS base/Electric lifting
(2)3L/5L/10L/20L/30L/50L---Manual Lifting/Electric Lifting
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Description
Technical Parameters
The laboratory rotary evaporator is a common experimental equipment mainly used for separating and concentrating liquid samples.Its working principle is to use high vacuum and constant temperature conditions to form a thin film of the heated sample in the rotary evaporator,thereby improving the evaporation efficiency.The working principle is based on vacuum distillation technology.Under reduced pressure,the distillation flask rotates continuously during solvent distillation.Due to the fact that the boiling point of a liquid decreases with the decrease of pressure,reducing the pressure inside the system through a vacuum system can allow the solvent to evaporate at a much lower temperature than its boiling point at atmospheric pressure.This technology can accelerate the evaporation process while reducing energy consumption.
Specifically,the evaporator consists of evaporator,condenser,collecting bottle and vacuum pump.First,the liquid sample to be treated is poured into an evaporator,and then it is placed on a heating device for heating.The heating device can provide a stable temperature and help the liquid sample evaporate quickly.
In the evaporation process,the special design of the rotary evaporator can evenly distribute the liquid sample on the inner wall of the evaporator to form a film.This helps to speed up the evaporation process,because the evaporation rate of liquid is directly proportional to its surface area.Steam is generated by rotating the heating element in the evaporator,which is condensed into liquid in the condenser and then flows into the collection bottle.
Finally,the air in the evaporator is pumped out by a vacuum pump to create a low-pressure environment.This low pressure environment can reduce the movement speed of steam molecules,thus reducing the possibility of steam molecules escaping to the surrounding environment and improving evaporation efficiency.
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Product Features
The requirements for materials in laboratory rotary evaporators are mainly reflected in their durability,corrosion resistance,high temperature resistance,and impact on the accuracy of experimental results.The following are specific material requirements:
The shell of the rotary evaporator is usually made of high-quality stainless steel material.This material has characteristics such as corrosion resistance and high temperature resistance,which can ensure that the instrument is not easily corroded and damaged by the external environment during long-term use.
Meanwhile,the stainless steel casing has a smooth and easy to clean surface,which helps maintain the hygiene performance of the instrument and extends its service life.
Heater:
The heater is usually made of high-temperature resistant ceramic materials.Ceramic materials have good thermal stability and thermal conductivity,which can maintain stable heating effects in high temperature environments and effectively avoid heat loss.
Rotor:
As one of the core components of a rotary evaporator,the rotor is usually made of stainless steel material.Stainless steel has excellent mechanical properties and corrosion resistance,which can ensure the stability and durability of the rotor during high-speed rotation.
Constant temperature bath:
The constant temperature bath uses high-quality plastic materials.This material has good thermal and chemical stability,and can maintain a constant temperature under different temperature conditions,thereby ensuring the accuracy and reliability of the experiment.
The evaporator is one of the core components of the rotary evaporator,and its material directly affects the performance and service life of the equipment.Common evaporator materials include glass,polytetrafluoroethylene,and stainless steel.
Glass material has good high-temperature resistance and chemical stability,suitable for evaporation of various solvents and chemicals;PTFE material has excellent corrosion resistance and is suitable for evaporating corrosive solvents such as strong acids and bases;Stainless steel material has strong pressure resistance and impact resistance,suitable for high temperature and high pressure experimental conditions.
The condenser is used for cooling and condensing steam,converting it into liquid and collecting it.The material of the condenser should have good thermal conductivity and corrosion resistance to ensure that it can maintain a stable cooling effect during long-term use.
In summary,the requirements for materials in profuct mainly include corrosion resistance,high temperature resistance,good thermal stability,and chemical stability.Choosing appropriate materials can ensure stable performance and reliability of the instrument during long-term use,thus meeting the laboratory's requirements for accuracy and reliability of experimental results.
Installation procedure
Prepare and check the work
Before installing the evaporator,make sure all parts are complete and not damaged or missing.
Check that the table is smooth,and if necessary,put four hard rubber feet to keep it level.
Install the frame and the head
Rotate the frame onto a firm workbench near the water source.
Move the head ZX to the appropriate height(e.g. 48cm),tilt to the right about 25 degrees,and then lock the lock nuts on the rack.
Fixed electric control box and connected power supply
Secure the electric control box in place.
Plug in the five-pin plug of the motor to ensure that the power is connected correctly.
Install the condenser and collection system
Insert the condenser into the nose interface,adjust the movable joints to make the condenser vertical,and maintain it with a fixing clamp.
Insert the feed tube into the condensing tube.
Connect the collecting bottle to the condensing pipe and clamp it securely with the bottle mouth clip.
Install rotary bottle and vacuum system
Place the rotating bottle on the right end of the rotating shaft and clamp it in place with a bottle clamp.
Connect the vacuum tube connector with the vacuum tube at the suction pipe,and connect the other connector to the vacuum pump or the laboratory vacuum switch.
Installation of other auxiliary equipment
Install auxiliary equipment such as auxiliary condenser,air guide cylinder and discharge valve as required.
Fault and solution
The motor does not rotate or the speed slows down
Cause of failure:
Motor internal brush wear.
The drive belt is broken or the tension is insufficient.
Running time is too long,the load is too heavy.
Blocked intake holes,pipes,or air intake filters.
The temperature sensor is damaged,the temperature controller is faulty,and the power supply is unstable.
The solution:
Replace the brush.
Replace the drive belt or increase the tension.
Shut down and stop using,continue to use after the motor is cooled,and adjust the load size appropriately.
Clean intake holes,pipes and intake filters.
Replace the temperature sensor and repair or replace the temperature controller to ensure a stable power supply.
The bath pan is not heated
Cause of failure:
The temperature controller is faulty.
The solid state relay or relay board is damaged.
Probe wiring problem or probe damage.
The solution:
Replace the temperature controller.
Replace the solid-state relay or relay board.
Check probe wiring or replace probe.
The vacuum can not be pumped
Cause of failure:
The solvent in the container is limited by the saturated injector pressure.
Vacuum pump capacity decreased.
The vacuum hose joint is loose and the vacuum gauge is leaking.
There are debris in the discharge valve and pressure control valve.
The glass fiber wool sandwich panel is damaged.
The solution:
Empty solvent,empty bottle test.
Vacuum oil pump oil change (water),cleaning and maintenance.
Detect and troubleshoot faults step by step along the vacuum line.
Re-assembly,scrub the glass wool sandwich plate,apply vacuum silicone grease,align the flange and tighten;Replace failed seals.
Clean the rotary evaporator or replace the glass wool sandwich panel.
The instrument makes an abnormal sound
Cause of failure:
The sealing ring is worn.
Internal gear wear.
Lack of oil in drive area.
The motor is faulty.
The solution:
Replace the seal ring.
Stop using immediately,contact the manufacturer or repair master.
Lubricate the driving parts.
Contact the manufacturer or maintenance technician for repair.
Abnormal rise and fall
Cause of failure:
The circuit board or motor is faulty.
Sliding bearings worn or rusted.
The solution:
Immediately stop the operation of the instrument,and contact professional maintenance personnel to repair the circuit board or motor.
Replace worn or rusted bearings and lubricate them.
Other faults
Cause of failure:
After the power switch is turned on,the power indicator is not on.
The motor heats badly.
The solution:
Check whether the power cable is connected or connected incorrectly,and connect the power cable;If the power switch,circuit board failure,should immediately stop use,contact the manufacturer or professional maintenance personnel.
Check whether excessive sample or excessive solvent viscosity leads to increased system burden,and appropriately reduce the sample size or use a lower viscosity solvent;Ensure that the instrument has a proper rest time after running for a period of time to avoid long-term continuous operation; Maintain regular maintenance and lubrication of bearings;The temperature should be gradually adjusted before use to avoid sudden warming or cooling.
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