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Ai SolventVap 20L Rotary Evaporator | PolyScience Chiller & Welch PTFE Pump 220V

Product Description

The Ai SolventVap 20L Rotary Evaporator | PolyScience Chiller is now ETL tested to UL/CSA standards. This certification is required by many municipalities, and it also provides a higher standard of equipment safety and lifespan. Also come standard is the new plexiglass bath cover. Specially designed for Ai 20L SolventVap rotary evaporators, this beneficial cover securely rests on top of the water bath and ensures the best possible temperature uniformity.

The newly re-designed Ai SolventVap 20L Rotary Evaporator | PolyScience Chiller (evaporating flask capacity) series rotary evaporators come with all PTFE valves for solvent-resistant operations. We also lowered the height of assembled unit, for easy installation and ease of use and storage. Also come with them are vertical glassware and digital temperature/rotation control. Its optimized bath volume allows for rapid heat-up times. The condenser unit has specially designed glass tubes that utilize surface area extremely efficiently. Thats why our SolventVap evaporators consistently deliver reliable and reproducible process results that are usually reserved for more costly systems. Another important aspect of the SolventVap is the safety features, which includes dry-run protection, water bath over-temperature shut-off protection, and fuse protection.

Rotary evaporator features a specially designed motor and worm gear, which provides constant rotation at speeds from 10 to 130 rpm. As the flask containing the solvent is rotated, it continually transfers a thin layer of liquid over the entire inner surface. This gives a very large surface area for evaporation, which is caused by the gentle heating from the water bath.

Efficient Processing: The rotating system is fitted with a special seal that allows the apparatus to be placed under vacuum, effectively reducing the boiling point of the solvents and removing the vapor phase, making the process much more efficient.

Continuous Feed & No Need to Break Vacuum: Each unit is also equipped with an easy-to-use vacuum release and a continuous feed system, which allows solvent to be constantly drawn into the rotating flask without needing to stop the operation.

Digital water bath operates from ambient temperature to 99C (210F) with PID temperature control stepping at 0.1C increments. Heating coils are located directly inside the pan for the most efficient heating possible. A built-in overheat protector will shut down power, should the controller fail.

Standard Glassware Set includes 5.28 gallon (20 liters) round-bottomed evaporating flask, 2.64 gallon (10 liters) round-bottomed receiving flask, and vertical condenser. Rotary evaporators with vertical glass condenser are great for distillation of solvents with higher boiling points.

Optimize your solvent recovery application by adding the Vapor Pressure Controller or the SNAP Controller to your rotary evaporator.


PolyScience 220V 6860 -10°C 13L 1.5HP recirculating chiller with turbine pump

 Welch 220V 2052 2.3 cfm 1.5 torr 4-head diaphragm pump and vacuum hose


  • ETL tested to UL and CSA standards
  • Free dual condenser and dual receiving flask, a $3,000 value
  • Water bath cover enhances safety by protecting evaporating flask and the material inside; it gives you uniform temperature inside evaporation flask as well as energy saving by reducing heat loss. It also creates a better lab environment by preventing heat and humidity from escaping.
  • New condenser insulation protects your glassware and increases cooling efficiency (included with rotovap purchase).
  • Free stainless steel 20L evaporating flask carrier with silicone cushions (a $299 value), custom made for Ai 20L SolventVap series rotary evaporators. This carrier can be placed on top of our 20L SolventVap’s water bath for easy loading and unloading. It can also be used as a flask stand.
  • New swivel casters can be adjusted for the rotary evaporator to stand securely on uneven floor.
  • Solvent-resistant PTFE and Viton gaskets, ensuring long time operation.
  • Specialized motor with extremely compact, intermeshed worm and worm gear provides precise driving for very quiet, vibration-free operation.
  • Downward-condensing vacuum connection design ensures safe vacuum operation.
  • Motorized water bath lifting for precise control.
  • Easy, straight-forward visual operation with digital speed and temperature display.
  • PID temperature controller ensures accurate temperature control is maintained.
  • One year warranty on rotary evaporator except for glassware and all sealing gaskets.

Ai SolventVap 5.3G/20L Rotary Evaporator Bundle Includes:

Part description  Quantity
Part image
PolyScience 220V 6860 -10°C 13L 1.5HP recirculating chiller with turbine pump 1 set PolyScience chiller
 Welch 220V 2052 2.3 cfm 1.5 torr 4-head diaphragm pump and vacuum hose 1 set  
 Ai 220V SolventVap 5.3-gallon rotary evaporator and water bath 1 set
 Dual main condensers with sleeves
Single auxiliary condenser with sleeve
3-way flask
1 set      
 5.3G/20L/0.7 cu ft round shaped rotating evaporating flask, glass 1 pc
 Dual 10L receiving flask 1 set
 Reinforced food grade vacuum & chilling tubing 15 ft
 Vapor duct & evapration flask seal (pre-installed) 1 set
 Glass material feeding port with PTFE open/close valve and PTFE extension feeding tube 1 set  
 Stainless steel pole & mechanical vacuum gauge 2 pcs
 Flask/condenser support x 2, bracket x 1 3 pcs
 QuickClamp and PTFE centering rings 7 sets
 GL18 x 5, 3/8″ fluid port for C30 chillers x 2 See left    
 Evaporating flask cap spanner, allen key & screws 1 set   
 NEMA L6-30 30A 250V power plug  Installed on rotovap
 Ai 20L stainless steel flask carrier / stand 1 pc
 Ai plexiglass bath cover for 20L SolventVap  1 pc
 Users manual 2 pcs

DigiVac Recommendations

Vacuum Control: VPC with VPPM Software for running recipes or RAMP control or the SNAP Vacuum Controller with onboard Automatic Process Control and Recipe Control to support SOP development and optimized vacuum drying.

Video Suggestions: VPC | SNAP |


A rotary evaporator is a device used in chemical laboratories for the efficient and gentle removal of solvents from samples by evaporation. The process of rotary evaporation is most often used to separate solvents with low boiling points, such a n-hexane or ethyl acetate, from compounds which are solid at room temperature and pressure. However, careful application also allows for the removal of a solvent from a sample containing a liquid compound, if there is minimal co-evaporation (azeotropic behavior) and a sufficient difference in boiling points at the chosen temperature and reduced pressure.


Example: The following table is a list of a variety of substances ordered by increasing vapor pressure (in absolute units).

Safety Notice

Your safety is important to us! Please use caution when operating. Users of glass reaction equipment must take all necessary precautions to avoid contact with rotating parts, particularly entanglement of loose clothing, hair, necklaces, or other jewelry. Under these circumstances, the winding action of the rotating parts can draw the user(s) into the apparatus, resulting in breakage of glassware, burns, and/or chemical exposure. Extra caution must also be taken when operating with air-reactive materials, especially under vacuum. A leak can draw air into the apparatus and cause a violent reaction to occur.

Technical Specifications

Electrical requirements
220V 50/60Hz single phase, 20A, 4300 watt (rotation motor: 300 watts)
Glass material High borosilicate glass 3.3
Evaporating flask Capacity: 5.28 gallon (20 liters or 0.7 cu ft)
Maximum load: Not to exceed 60% of the flask’s capacity
Sealing flange: 4.9″ diameter
Rotation speed: 10 to 130 rpm
Evaporating speed: 1 gallon/hour (water), 2 gallon/hour (alcohol)
Receiving flask
2.64 gallon (10 liters or 0.35 cu ft)
Condenser Glassware: Main + auxiliary triple-circulating cold traps, vertical
Chilling fluid conneciton: 3/8″ hose barb x 4 (2 on main + 2 on auxiliary)
Condensing surface
Main condenser: 9,480 cm2 or 10.2 sq ft
Auxiliary condenser: 3,580 cm2 or 3.9 sq ft
Working environment 5 to 95F
Water bath Temperature range: ambient to 99C (210F)
Temperature controller: digital
Dimensions: 17.5″ diameter x 9.8″ depth x 12″ height
Material: stainless steel
Media: distilled water only
Max. water level: not to exceed 1″ from the top rim of the bath
Number of heaters: two
Drain port: one
Exterior liner: rubber
Lifting: motorized
Maximum lifting distance: 7.5 inches
Vacuum Level: < 3 torrs
Sealing: PTFE + Viton gaskets
Connector: 3/8″ hose barb x 1
Swivel casters Four, built-in with locks
Safety Dry-run, over-temp shut-off, built-in circuit breakers
Shipping weight 238 Lb (evaporator), 130 Lb (glassware)
Unit/shipping dimensions 49 x 23.5 x 82.5″ / 41 x 24 x 48″ (evaporator), 34 x 29 x 33″ (glassware) (WxDxH)
Certification ETL tested to UL and CSA standards
Download Ai rotary evaporator brochure

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Ai SolventVap 20L Rotary Evaporator | PolyScience Chiller & Welch PTFE Pump 220V