Does the trapped liquid drain back? I cannot see any drain holes in the inner column for return to the boiling flask

Dear Customer, Yes, there is a hole in the inner column. Here is the image: https://s3.amazonaws.com/us-manageimages/c8788220-5d6b-4760-97ab-15033df9e47a_ProductImage_MAIN?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20200623T014450Z&X-Amz-SignedHeaders=host&X-Amz-Expires=129600&X-Amz-Credential=AKIA3IQPFAWYJLBVZNYV%2F20200623%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=ecb36837537d7e10312dfc45f88b6bc0c29f4a8425e4d5794d4faea74512da98 Thanks, Lizzy L

Whats the purpose of this attachment and what difference between does it makes?

This is placed between the evaporation flask and vapor tube on a rotary evaporator. When heat/vacuum is applied, occasionally the solvent mixture will violently boil or “bump.” This glassware prevents the solvent mixture from entering the condenser, prevent contamination of the instrument in places that are difficult to clean, and improves overall yield by allowing the solvent mixture to drain back into the evaporation flask. I have never used a rotary evaporator without some sort of bump trap and highly recommend every lab with a rotary evaporator invest in at least two of these.

Size please in mm please? thanks

Dear customer, It's 24/40 mm Thanks, J&D Tech

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stonylab Rotary Evaporator Bump Trap 24/40 Outer Upper Joint, 24/40 Standard Taper Inner Lower Joint, 250 ml

stonylab Rotary Evaporator Bump Trap 24/40 Outer Upper Joint, 24/40 Standard Taper Inner Lower Joint, 250 ml

Product ID: 309852919

Details

Material
Glass
Capacity
250
Brand
stonylab
Bottom shape
Round
Graduation interval
250
UPC
843798170186

🔗24/40 standard taper joints

🔥withstands up to 200°C

🧪250 ml capacity

€ 102.54

Duties & taxes included

In stock

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Description

🧪 Elevate your lab game—trap the splash, keep the precision!

REUSABLE RELIABLE - Durable design ensures long-term use without compromising lab efficiency
PEACE OF MIND WARRANTY - 1-year limited warranty with responsive customer support for any issues
SPLASH PROOF PRECISION - Prevents solvent splashing for cleaner, safer evaporation
UNIVERSAL COMPATIBILITY - Standard 24/40 upper and lower joints fit most rotary evaporators seamlessly
ROBUST BOROSILICATE BUILD - Heavy-duty glass designed to endure high temperatures up to 200°C

The Stonylab Rotary Evaporator Bump Trap is a 250 ml borosilicate glass accessory designed to prevent solvent splashing during rotary evaporation. Featuring standard 24/40 taper joints and a heavy-duty build that withstands temperatures up to 200°C, it ensures compatibility and durability for professional lab environments. Backed by a 1-year limited warranty, it offers reliable performance and peace of mind for scientific workflows.

Specifications

ASIN	B08R3NVMZ7
Best Sellers Rank	196,278 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 409 in Lab Evaporation & Drying Equipment
Bottom Shape	Round
Bottom shape	Round
Brand	stonylab
Capacity	250 ml
Country Of Origin	China
Customer Reviews	4.8 out of 5 stars 7 Reviews
Global Trade Identification Number	00843798170186
Graduation Interval	250 Millilitres
Graduation interval	250 Millilitres
Manufacturer	StonyLab Scientific
Manufacturer Part Number	RotaryEvaporator-Trap-24/40-250ml
Material	Glass
Material Type	Glass
UPC	843798170186
Unit Count	1.0 count

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