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Rotary Evaporator

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Specifications Features
Function (RE801) 53 Solvents in the
memory of RE801
The Saturated Vapor
Pressure Curve
In The Memory
Specification of optional
Vacuum Regulator VR300
Specification for
Water Bath BM500/510,
Oil Bath BO400/410
Specification of optional
Vapor Temperature
Indicator TA300
Optional Accessories Peripheral Equipment

Model RE301
Composition Motor DC brushless motor (for rotation) and Rod Actuator (for lifting)
and features
Rotation speed 20 - 250 r/min (rpm)
Lift stroke 130mm
Speed (rpm) setting Control knob (digital indication)
Safety measures (main unit) Manual-setting lower limit, upper limit, motor overload
Lifting feature Rod Actuating
Specifications External
dimension *1
With Glassware A (mm) 828(W)× 400(D)×586(H) (716 when raised) mm
With Glassware B/C (mm) 643(W)× 400(D)×727(H) (857 when raised) mm
Weight Approx. 14.1kg(excluding the glassware and the water/oil bath)
Power supply Main unit 100 - 240V AC, 1.5A(excluding the water/oil bath)

Model RE601 RE801
Composition Motor DC brushless motor (for rotation) and Rod Actuator (for lifting)
Controller Vacuum regulator VR600 Vacuum regulator VR800
Performance Rotation speed 20 - 250 r/min (rpm)
Lift stroke 130mm
Setting range of vacuum 0-981hPa
Measurable range of vacuum 0-1033hPa
Resolution of vacuum 1hPa
Setting range of hysteresis 1-50hPa
Resolution of vapor temperature indicator Selectable(either 1deg.C or 0.1deg.C)
Readout of cooling water temperature Depending on indicator(option)
Resolution of cooling water temperature indicator 1deg.C or 0.1deg.C
and features
Operation modes Manual without vacuum control, preset, preset with timer, pressure gradient, and gradient with timer
- Auto I (drying), Auto II (for one solvent)
Setting range of timer 1-999 minutes in increments/decrements of 1 minute for preset operations,1-99 minutes for progressive operations
Memory 10 programs/operation mode
Data of solvents - 53 saturated vapor pressure curves
Speed (rpm) setting Control knob (digital indication)
Safety measures (drive unit) Manual-setting lower limit, upper limit (RE801 only), motor overload
Safety measures (vacuum regulator) Self-diagnosis, main unit/bath synchronized stop at malfunctions
Synchronized control feature Selection of automatic bath stop or automatic insulation
Lifting feature Motorized lifting system Motorized lifting system synchronized with control
Specifications External *1
With Glassware A (mm) 828(W)× 400(D)×727(H)(857(H)when raised)
With Glassware B/C (mm) 643(W)× 400(D)×727(H)(857(H)when raised)
Weight Approx. 15.1kg(excluding the glassware and the water/oil bath)
Power supply Main unit 100 - 240V AC, 1.5A(excluding the water/oil bath)

*1 External dimensions (excluding protrusions)

*2 A microprocessor memorizes the saturated vapor pressure of each solvent and automatically presets an optimum vacuum pressure.


1.Motorized lift standard for all models 2.Digital settings and display in Japanese or English

Yamato Rotary Evaporators, models RE301/601/801, are easily raised or lowered by simple operation of switch. Model RE801, can be pre-set, so that when operation of the rotary evaporator ceases, unit will be raised.

The evaporator's motor speed(rpm), vacuum(degrees) and vapor temperature can be digitally set and displayed. Experimental conditions and steps during a reaction can be saved and repeated in future. Display language can be chose either Japanese or English.(Only the rpm of the motor can be digitally displayed in model RE301.)
3.Space-saving design 4.Movable rotary joint

The rotary evaporator is compact, which can be neatly installed in a fume hood. Despite its depth of 400 mm, the vertical condenser (Glassware B/C) does not take up space.

The rotary joint's locking position feature is adjustable within 80 mm; especially useful when using varying capacity evaporating flasks or when there is a need to shift the vacuum seal's contact position. (Patent No. 3220033)
5.Quick release of evaporating flask 6.Newly designed glass components
(Guard against liquid stagnation)

The evaporating flask can be released easily and quickly by just turning the flask release nut.vertical condenser (Glassware B/C) does not take up space.

quickly by just turning the flask release nut. Vertical condenser(Glassware B&C) function to prevent liquid from stagnating. (patent pending) New condenser tubes (type A&B) designed to increase rapidity of cooling capacity.(Surface area is 20% larger than previous model.)
7.Water bath (oil bath) 8.Voltage-sensing power pack

Original removable bath enables easy cleaning and replacing of the water(oil). The digital temperature indicator is designed for easy setting and reading. The most suitable bath is selectable from model BM Water Bath or Model BO Oil Bath in accordance with working temperatures of the experiment.

The rotary evaporator (including the water bath, oil bath and some optional accessories) works with a power supply of 100-240V AC. For use overseas, please choose a plug according to shape of socket your abode among configuration of power plugs(and cord) as an option herein.
9.Hose joints 10.Others

Resin-made hose joints are used for easy connection of cooling water and vacuum hoses to their corresponding glass ports.

*Vacuum seal
The fluoro-rubber vacuum seal with its multistage configuration is designed to maintain the stability of reduced pressures. Pure Teflon vacuum seal is also available as an option for evaporation of ether-based and ketone-based liquids.。

*Carefully designed safety measures
The evaporator can detect any malfunctions in the driving mechanisms in the rotary section and the lifting device, and will automatically stop to ensure safety. It can also automatically detect abnormal temperatures in the water bath and oil bath and will stop the operation of the evaporator(only for models RE601/801).

*Stable rotation at low and high speeds
Together with the digital setting and display, the rotary evaporator maintains a stable rotation by using the feedback control feature. This ensures precise reproducibility of experiments.




  • Motorized lift
  • Feedback control motor
  • Voltage-sensing power supply
  • Digital setting and rpm display
  • Stable rotation

[ RE601/801 ]



  • Motorized lift
  • Good readouts in either Japanese or English
  • Equipped with several operation modes, such as preset mode, timer mode, progressive mode and customer-programmed mode
  • One-touch operation of storing and readout of operating conditions
  • Voltage-sensing power supply
[ RE801 ]



  • Automatic distillation
  • Continuous bath control
  • Data on 53 solvents installed as default

Function (RE801)

-Vacuum regulation -
Boiling point indicates a temperature at which ambient pressure becomes equal to the saturated vapor pressure of a liquid. The saturated vapor pressure varies with the temperature. The pressure goes down when the temperature decreases. "Vacuum regulation" is the reduction in the internal pressure of a vessel which can decrease the boiling point of a liquid.

-Vapor temperature-
Once a liquid reaches its boiling point, it starts vaporizing, generating bubbles and foam. (This is different from what is generally known as "bumping".) The temperature of the vapor in this state is called "vapor temperature".

-Automatic distillation-
After the desired vapor temperature is preset, pressure is reduced until the temperature reaches the preset temperature. The reduced pressure is maintained at this temperature. When the vapor temperature deviates from its setting, the automatic distillation feature will either proceed to the next step (setting) in the operation or stop the operation there. This feature detects even a fine fluctuation of pressure and automatically regulates it to prevent bumping and ensure gradual change in pressure.


53 Solvents in the memory of RE801
For Low Boiling Point
1,2Dichloroethylene cis
1,2Dichloroethylene trs
Ethyl Acetate
Ethyl acetate
Methyl acetate
Diisopropyl Ether
Diethyl Ether
For High Boiling Point
Isoamyl Alcohol
Ethylene Glycol
Hexanoic acid
Formic acid
Acetic acid
Propyl  acetate
Butanic acid

The Saturated Vapor Pressure Curve In The Memory
The following Antoine Formula is often used for the calculation of liquid’s steam pressure.
log P = A - B / ( C - t )・・・・・Antoine(Antoine’s Formula)P : Steam Pressure(kPa) T : Temperature(deg.C),  A, B, C are called “Antoine Constant” and they are various depending on the substance.

Specification of optional Vacuum Regulator VR300
Vacuum sensor 0 to 981hPa
Setting range of vacuum 0-981hPa
Measurable range of vacuum 0-1033hPa
Resolution of vacuum 1hPa
Setting range of hysteresis 1-50hPa
Operation modes Customer-programmed, presetting, presetting with timer, progressive, and progressive with timer modes
range of timer
Preset operation 1 - 999minutes
Progressive operation 1 - 99minutes
Safety measures Self-diagnosis, alarm

Specification for Water Bath BM500/510, Oil Bath BO400/410
Product code 222120 222121 222113 222115
Model BM500 BM510 BO400 BO410
Composition Bath
(made of stainless steel )
External dimension 263mm (outer diameter) × 165mm (base diameter) × 124mm (height)
Heater Output 120V/1440W
(equivalent to 1000W at 100V)
(equivalent to 1000W at 220V)
(equivalent to 1000W at 100V)
(equivalent to 1000W at 200V)
Controller Setting, indicating and controlling Digital setting by up down keys, digital indication and PID control
Sensor Type K thermocouple
Power Switch Functs as a circuit breaker
Casing ABS heat resistant resin
Performance Ambient temperature 5 to 35deg.C
Setting range and accuracy of temperatures Room temperature +5-100deg.C ±1.5deg.C (at stirring) Room temperature +5 to 180deg.C ±2deg.C (at stirring)
Features Operation mode Preset, quick auto-stop, auto stop, auto start
Setting range of timer 0-999 hours 50 minutes (an increment/decrement of 1 minute for 0-99 hours 59 minutes, at an increment/decrement of 10 minutes for 100-999 hours 50 minutes)
Auxiliary features Key locking, RE signal transmission-reception, power-stabilizing against power failure, calibration offsetting
Safety measures (main unit) Self-diagnosis (automatic prevention of overload, detection of sensor malfunction), circuit-breaking power switch, thermal fuse, bath level sensor
Operation control Automatic operation control with signals from RE601/801 controller (continuous operation, heat insulating operation and stop), report of errors to RE601/801
Specification External dimensions(mm) and weight W340 × D349 × H231 / Approx. 5.5kg
Power supply 100-120V AC 12.5A 200-240V AC 6.5A 100-120V AC 12.5A 200-240V AC 6.5A

Specification of optional Vapor Temperature Indicator TA300
Vapor temperature sensor Pt100 ohem
Steam temperature indicator Digital indication
Resolution of vapor temperature indicator 0.1deg.C

Optional Accessories
Remark Description Model No. Product Code
  Water bath AC100-120V for BM500 RE301/601/801 222120
  Water bath AC200-240V for BM510 RE301/601/801 222121
  Oil bath AC100-120V for BO400 RE301/601/801 222113
  Oil bath AC200-240V for BO410 RE301/601/801 222115
  Vacuum controller (RE301) for VR300 RE301 255277
  Teflon vacuum seal, ORE70 RE301/601/801 255368
  VR300/600/800 Teflon electromagnetic valve, ORE80 RE301/601/801 255341
  VR300/600/800 SUS pressure sensor, ORE90 RE301/601/801 255342
  Steam temp. display for TA300 RE301 255317
  Trap (with nozzle) for RE301/601/801, ORE40 RE301/601/801 255285
  Hose connection parts for RE301/601/801, ORE30 RE301/601/801 255284
  Vacuum Pump Control Unit for RE601/801, ORE60 RE601/801 255288
  Cooling hose, 9mm dia,  2mX1pc. RE301/601/801 255296
  Vacuum hose, 6mm dia,  5mX1pc. RE301/601/801 255297
  Distillation flask 100ml, translucent ORG20 RE301/601/801 RE20000100
  Distillation flask 200ml, translucent ORG22 RE301/601/801 RE20000200
  Distillation flask 300ml, translucent ORG24 RE301/601/801 RE20000300
  Distillation flask 500ml, translucent ORG26 RE301/601/801 RE20000500
  Distillation flask 1L ORG16 RE301/601/801 RG00A30040
  Distillation flask 2L, translucent ORG28 RE301/601/801 RE20002000
  Receiving flask, 300ml ORG34 RE301/601/801 RE47002
  Receiving flask, 500ml ORG36 RE301/601/801 RE47001
  Receiving flask 1L ORG18 RE301/601/801 2551730413
  Receiving flask, 2L ORG38 RE301/601/801 2127410575
  Coating distillation flask 1L ORG58 RE301/601/801 255505
  Coating receiving flask 1L ORG56 RE301/601/801 255511
  Clamp KS35B RE301/601/801 LT00035452
  Clamp KC39 RE301/601/801 F0410001
  Three-way cock, ORG50 RE301/601/801 255363
* Stand with caster (15A service receptacle), ORE10 RE301/601/801 255282
The transportation cost will not be required if the order is together with main unit except the item marked "*".
In case you order the item marked "*" together with the main unit, please ask Yamato to obtain the correct transportation cost.

Hose connection parts and trap
(with nozzle)

Water Bath BM500/510
Oil Bath BO400/410

Vacuum regulator VR300

Steam temperature indicator TA300

Vacuum pump control unit

Peripheral Equipment

RE801BW +Vacuum pump PG201+Solvent recovery unit RT200+Cooling water circulation unit CF301+Cart

RE801BW +Vacuum pump PG201+Cooling water circulation unit CF301
Product code Description Model Working temperature Cooling capacity Power supply
255281 Solvent recovery unit RT200 - - -
221512 Cooling water circulation unit CF301 -20deg.C - room temperature 385kcal/h at 10deg.C 100V AC
221527 Cooling water circulation unit CF800 -20deg.C - room temperature 830kcal/h at 10deg.C 100V AC
221563 Cooling water circulation
/pump unit
CF321P -20deg.C - room temperature 344kcal/h at 10deg.C 100V AC
221579 Cooling water circulation
/pump unit
CF800P -20deg.C - room temperature 903kcal/h at 10deg.C 100V AC
Product code Description Model Ultimate vacuum* Displacement Power supply
242424 Handy aspirator WP15 2.3kPa at 20deg.C 11-14l/min×2 100V AC
255158 Diaphragm vacuum pump PG201 1000Pa 20/24l/min(50/60Hz) 100V AC
255159 Diaphragm vacuum pump PG301 1000Pa 15-30l/min(50/60Hz) 100V-240V AC
242237 Diaphragm vacuum pump DTC-41 1000Pa 40/46l/min(50/60Hz) 100V AC
Depending on the water vapor pressure at a given working temperature
Product code Description Model Attainable lowest temperature Trap capacity Dehumidification Power supply
221436 Cooling trap CA301 -45deg.C Approx. 4L 0.9kg 100V AC
221487 Glass condenser for CA301 - - - - -
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