Specifications

Serpentine Reflux Condenser · Specifications

The following are general specifications. For custom sizes or special joint sizes, please contact our sales team.

Joint Size	Effective Length (mm)	Coil OD (mm)	Hose Barb OD (mm)	Material
Please contact us to confirm the available specifications.

* Dimensions are approximate.
* Effective length is the condensation length of the jacket.
* Number of coils can be customized.
* Custom joint sizes and lengths available upon request.

Note: Serpentine reflux condensers typically use 19#, 24#, and 29# joint sizes. 14# size is limited by the inner tube diameter; please inquire for custom orders.

Joint Size	Effective Length (mm)
Please contact us to confirm the available specifications.

Product Description

The serpentine reflux condenser is a specialized condensation device designed for reflux reactions in standard joint glassware. Its serpentine inner tube design provides an exceptionally long condensation path, ensuring complete vapor condensation and return to the reaction system. This design is particularly essential for long-duration organic synthesis reflux reactions where solvent loss must be minimized. The standard 1:10 taper ground glass joint ensures reliable sealing and interchangeability with all standard joint accessories. Manufactured from borosilicate glass 3.3, it offers excellent thermal and chemical resistance. Effective lengths range from 200mm to 1000mm to accommodate various reaction scales.

Key Features

Borosilicate Glass 3.3: ISO 3585 compliant, low expansion, thermal shock 280°C
Serpentine Inner Tube: Longest condensation path for complete reflux
Reflux Specialized Design: Optimized serpentine structure for extended reflux reactions
Standard Joint: 1:10 taper, precision ground for reliable sealing
Multiple Sizes: Available in 19#, 24#, 29# joint sizes
Multiple Lengths: 200mm ~ 1000mm effective lengths
High Transparency: Easy observation of reflux status
Chemical Resistant: Suitable for various organic solvents

Quality Assurance

Every condenser undergoes strict dimensional inspection, joint taper testing, and thermal resistance testing to ensure compliance with applicable standards.

Note: Ensure joints are clean and dry before use to prevent sticking. Cooling water should flow from the lower inlet to the upper outlet for optimal efficiency. Serpentine reflux condensers are specifically designed for reflux reactions.

Applications

Typical Applications

Reflux Reactions

Organic synthesis reflux, polymerization, extended heating reactions

Soxhlet Extraction

Fat extraction, natural product extraction (reflux cycling)

Pharmaceutical R&D

Intermediate synthesis, API reflux reactions

Solvent Purification

Reflux drying, solvent refining

Education

University organic chemistry lab teaching

Analytical Chemistry

Reflux digestion, sample preparation

Compatible Equipment

Standard joint round-bottom flasks, three-neck flasks

Reactors, Soxhlet extractors

Heating mantles, oil baths

Tip: The serpentine reflux condenser is the specialized condensation device for reflux reactions, providing the longest condensation path for complete vapor return. 24# and 29# sizes are available in 1000mm extra-long length for large-scale reactions. Use accessories of the same joint size for optimal sealing.

Operation & Maintenance

User Guide

Preparation

Inspect condenser for cracks, chips, or scratched joints
Clean joint surfaces with a soft cloth or cotton swab
Apply a small amount of vacuum grease if joints are too tight

Installation & Connection

Connect the condenser vertically to the flask or reactor via the joint
Insert with gentle twisting motion, do not force
Secure the condenser with a clamp for vertical stability
Connect cooling water: lower inlet → upper outlet, ensure correct flow direction
Maintain moderate water flow rate for optimal condensation

Reflux Operation

Turn on cooling water before heating, maintain steady flow
Observe vapor rise, ensure all vapor is condensed before reaching the top
Adjust heating power for moderate reflux rate, avoid bumping
Regularly check cooling water flow during extended reflux
For extra-long condensers (1000mm), increase water flow rate as needed

Disassembly & Cleaning

Stop heating first, continue cooling water flow for cool down
Turn off cooling water, gently twist to detach
Clean immediately after use to prevent residue buildup
Wash joints with soft brush and detergent, avoid hard objects
Clean serpentine coil with a long-handled soft brush
Air dry after washing, store with soft paper between joints

Care & Notes

Show care & notes

Safety Tips

Ensure cooling water connections are secure to prevent leaks
Maintain continuous cooling water flow during reflux to prevent solvent loss
Monitor cooling water temperature during extended reflux; use chilled circulating water if necessary
Always work in a fume hood when handling hazardous chemicals

Do not

Do not use cracked or chipped condensers for reflux experiments
For 1000mm extra-long condensers, ensure vertical installation to avoid bending stress

Serpentine Reflux Condenser

Specifications