Specifications

Solvent Distillation Head · Specifications

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

Request custom specs

1. Product Structure

Upper Joint 24/40 Standard Joint (to condenser)

Lower Joint 24/40 Standard Joint (to two-neck flask)

Upper Side Port 14/20 + 4mm PTFE Stopcock (syringe sampling)

Lower Side Outlet Without joint (bulk liquid removal)

Material Borosilicate 3.3 + PTFE Stopcock

Temperature Thermal Shock 280°C

2. Capacity Specifications

Capacity (ml)	Upper Joint	Lower Joint	Sampling Port	Stopcock Bore	Material
Please contact us to confirm the available specifications.

* Main joint is 24/40 standard; other sizes available upon request.
* Lower side outlet available without joint (standard) or with joint.
* Custom capacities and special structures available upon request.

3. Configuration Options

Option	Available Types	Description
Please contact us to confirm the available specifications.

* Options can be freely combined.
* Double PTFE stopcock models are ideal for simultaneous sampling and liquid control.

Product Description

The solvent distillation head is a specialized apparatus designed for laboratory solvent purification, drying, and recovery. It connects to a condenser (top) and a two-neck flask (bottom) to form a complete solvent distillation system. Manufactured from borosilicate glass 3.3, it offers excellent thermal and chemical resistance for various organic solvent handling applications.

Key Features

Borosilicate Glass 3.3: ISO 3585 compliant, low expansion, thermal shock 280°C
24/40 Standard Joint: Main joint compatible with standard distillation apparatus
4mm PTFE Stopcock: Corrosion-resistant, excellent sealing for organic solvents
Syringe Sampling Port: 14/20 joint with PTFE stopcock permits syringe sampling without air exposure
Bulk Liquid Outlet: Lower side outlet for bulk liquid removal
Multiple Capacities: Available in 250ml, 500ml, and 1000ml
High Transparency: Easy observation of distillation and reflux
Chemical Resistant: Suitable for various organic solvents

Quality Assurance

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

Note: Ensure all joints are clean and dry before use. Check PTFE stopcock O-ring integrity and smooth rotation before operation. Using PTFE liners can completely eliminate vacuum grease contamination.

Applications

Typical Applications

Solvent Purification

Anhydrous and oxygen-free solvent distillation

Solvent Drying

Reflux drying with desiccants

Solvent Recovery

Post-experiment solvent recycling

Azeotropic Distillation

Separation of azeotropic mixtures

Schlenk Techniques

Inert atmosphere solvent handling

Pharmaceutical R&D

High-purity solvent preparation

Typical Apparatus Assembly

Upper (24/40) → Condenser

Lower (24/40) → Two-neck flask (receiving flask)

Upper side (14/20 + PTFE stopcock) → Syringe sampling/reagent addition

Lower side outlet → Bulk liquid removal

Tip: The solvent distillation head is the core component of solvent purification systems. The PTFE stopcock design ensures system integrity and prevents solvent-air contact. Using PTFE liners completely eliminates vacuum grease contamination.

Operation & Maintenance

User Guide

Preparation

Inspect distillation head for cracks, chips, or scratched joints
Clean all joint surfaces with a soft cloth or cotton swab
Check PTFE stopcock O-ring integrity and smooth rotation
If using PTFE liners, confirm proper installation

Installation & Connection

Connect the upper joint (24/40) to the condenser
Connect the lower joint (24/40) to the two-neck flask
Upper side port (14/20) for syringe sampling or reagent addition
Insert with gentle twisting motion, do not force
Secure components with clamps for stability
Confirm PTFE stopcock is in the closed position

Distillation/Reflux Operation

Check all joints for proper sealing
Begin heating, observe solvent reflux and distillation
For sampling: Use syringe through the 14/20 port with septum
For bulk liquid removal: Use the lower side outlet
Double stopcock models allow simultaneous control of sampling and drainage
Maintain system integrity throughout the process

Disassembly & Cleaning

Stop heating first, allow system to cool
Gently twist to detach components
PTFE stopcock can be removed for separate cleaning
Clean immediately after use to prevent residue buildup
Wash joints with soft brush and detergent, avoid hard objects
PTFE stopcock can be cleaned with organic solvents; maintain O-ring
Air dry after washing, store with soft paper between joints

Care & Notes

Show care & notes

Safety Tips

PTFE stopcock maximum operating temperature: 280°C
Control temperature carefully when distilling flammable solvents
Always work in a fume hood when handling hazardous chemicals
For Schlenk operations, maintain inert gas protection

Do not

Do not use cracked or chipped distillation heads for experiments

Solvent Distillation Head

Specifications