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

S/.467

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Description

🧪 Elevate your lab game with splash-proof precision!

UNIVERSAL FIT - Standard 24/40 joints ensure seamless compatibility
SPLASH FREE PRECISION - Prevents solvent splashing for cleaner, safer evaporation
PEACE OF MIND WARRANTY - 1-year limited warranty with responsive customer support
DURABLE BOROSILICATE GLASS - Heavy-duty, heat-resistant design built to last
OPTIMIZED SOLVENT RECOVERY - Keeps contaminants out, maximizing purity and yield

The Stonylab Rotary Evaporator Bump Trap is a 250 ml borosilicate glass accessory designed to prevent solvent splashing and contamination during rotary evaporation. Featuring standard 24/40 taper joints and heat resistance up to 200°C, it ensures durability and compatibility for professional lab environments, backed by a 1-year limited warranty.

Specifications

ASIN	B08R3NVMZ7
Best Sellers Rank	198,719 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 411 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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S/.467

Duties & taxes included

In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Peru.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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The delivery time was excellent, and the packaging was secure.

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