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SKU RE1020DUCT
USA Lab
20L RE-1020 Rotary Evaporator Replacement Vapor Duct
$140.00
In stockReplacement thick-walled glass vapor duct for the 20L RE-1020 rotary evaporator. The duct seats in the center of the rotating motor and carries vapor from the 20L boiling flask through to the bump trap and condensers. The RE Series user manual specifies GG-17 3.3 high-grade borosilicate glass throughout the system, with a glass vacuum rating of 399.9 Pa (5 Torr). Greasing at both sealing faces is a scheduled maintenance item, not optional.
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Description
Replacement vapor duct for the 20L RE-1020 rotary evaporator. The duct is the rotating glass spindle that passes through the center of the drive motor: the boiling flask screws onto one end, the bump trap and condenser train sit on the other, and every gram of vapor leaving the flask travels through it. It is constructed in thick-walled glass for durability and heat resistance.
Fitting follows section 3.4 of the RE Series user manual. Remove the condenser screw and its retainer, confirm the green O-ring is seated on the flanged end of the duct, then insert the duct into the center of the rotating motor. The condenser screw and retainer are reused to secure the bump trap against a greased seal washer at the outboard end.
Figures the manual gives for the RE Series glass train:
- Glass composition: GG-17 3.3 high-grade borosilicate
- Glass vacuum rating: 399.9 Pa / 5 Torr / 5,000 millitorr
- Rotation speed range: 20-120 RPM
- Rotary vacuum seal material: PTFE + Viton
- RE-1020 boiling flask capacity: 20L; receiving flask 10L
The duct is a wear part. The manual calls for periodic re-greasing at the marked seal locations; where that is missed, the reported symptoms are vacuum leaks and loud grinding noise from the motor area.
Frequently asked questions
Which rotary evaporator does this vapor duct fit?+
It is listed specifically for the 20L RE-1020. The RE Series covers the RE-1005, RE-1020 and RE-1050, and ducts are sold as separate model-specific parts, so do not assume a duct for one model fits another.
How is the vapor duct installed?+
Following section 3.4 of the RE Series user manual: remove the condenser screw and retainer first, make sure the green O-ring is on the flanged end of the duct, then insert the duct into the center of the rotating motor. The condenser screw and retainer are then reused to clamp the bump trap onto a greased seal washer at the other end of the duct.
What glass is it made from, and what vacuum will it take?+
The RE Series manual gives the system glass composition as GG-17 3.3 high-grade borosilicate and the glass vacuum rating as 399.9 Pa, equivalent to 5 Torr or 5,000 millitorr. The duct itself is described as thick-walled for durability and heat resistance.
Are the O-ring and seal washer supplied with it?+
Our source data describes this part as the vapor duct and does not itemize the green O-ring or the seal washer that sits between the duct and the bump trap, so we do not publish them as included. Both are wear items - inspect them when you change the duct and replace them if they are hardened, flattened or torn.
Why do vapor ducts need replacing?+
The duct rotates against greased sealing faces at both ends. The manual requires periodic re-greasing; when that is skipped the documented symptoms are vacuum leaks and loud grinding noise in the motor area, and the sealing surfaces wear. Chipped or cracked glassware should be taken out of service rather than run.
What rotation speed and load does the RE-1020 run at?+
The manual specifies 20-120 RPM across the RE Series and a maximum loaded volume of 60% of the total volume of the evaporating flask. Overfilling the flask loads the duct and the drive far beyond the design intent.
