Specifications

T‑Shaped Connector · Specifications

Standard sizes are listed below. All products comply with GB/T, ASTM, and ISO standard taper systems. Custom sizes, stopcock bore diameters, and reducing configurations are available.

Request custom specs

GB/T	ASTM	ISO	Port Configuration	Stopcock Bore	Stopcock Material	Material
Please contact us to confirm the available specifications.

* Joint numbers (14#, 19#) indicate the largest diameter (mm) of the taper. All are 1:10 taper.
* GB/ASTM/ISO designations are different standard identifiers — physical dimensions are identical and fully interchangeable.
* Stopcock bore sizes: 2mm, 4mm, 6mm available. PTFE stopcocks require no grease.
* Custom reducing example: straight 24# + side 19#.
* Contact our sales team for MOQ and lead time on custom orders.

✦ Customization Services — We offer non‑standard joint sizes, reducing configurations, custom stopcock bore diameters, and materials. Share your specific requirements and our technical team will provide a tailored solution.

Product Description

The T‑shaped connector is a three‑way glass adapter with a T‑bore stopcock, designed for flow direction control in standard taper glass assemblies. Its straight‑through body with a perpendicular side arm and T‑bore stopcock allows operators to conveniently switch between straight‑through, side‑arm, or closed positions, providing precise control over gas or liquid flow. A 90° vacuum side arm is standard on the right side for connection to vacuum pumps or inert gas supplies. This connector is an essential component for Schlenk lines, vacuum manifolds, and multi‑port reaction systems.

Key Features

Borosilicate Glass 3.3: Meets GB/ISO/ASTM standards, low thermal expansion, thermal shock resistance up to 280°C, excellent resistance to most acids, bases, and organic solvents
Multi‑Standard Compliance: Precision‑ground 1:10 taper meets GB/T, ASTM E, and ISO 3585 standard taper specifications, guaranteeing full interchangeability with all major standard systems
T‑bore Stopcock: Available in glass (cost‑effective, suitable for most organic systems) or PTFE (resistant to strong acids/bases, no lubrication required, superior seal)
90° Vacuum Side Arm: Standard on the right side for easy connection to vacuum pumps, inert gas cylinders, or Schlenk lines
Customizable: Available in 14#, 19#, 24#, 29# with stopcock bore sizes (2mm / 4mm / 6mm) and reducing configurations

Quality Assurance

Each T‑connector is inspected for taper accuracy, stopcock seal integrity, and surface finish to ensure reliable performance with all standard joint components. Custom bulk orders are welcome.

Tip: The T‑bore stopcock allows convenient flow switching. For vacuum applications, PTFE stopcocks are recommended for optimal sealing.

Applications

Typical Uses

Schlenk Line Systems

Flow switching for inert gas protection

Vacuum Manifolds

Switch between vacuum and vent positions for multi‑port vacuum control

Inert Atmosphere

Alternate between N₂/Ar purge and vacuum evacuation

Continuous Flow Chemistry

Flow direction control in multi‑feed systems

Teaching Labs

Fundamental flow control for organic/inorganic courses

Compatible Equipment

Standard joint flasks, condensers, distillation and fractionating heads

Schlenk lines, vacuum manifolds

Inert gas (N₂/Ar) supply systems

Vacuum pumps and vacuum lines

Tip: Always use matching standard joint sizes for optimal sealing. The 90° side arm is designed for easy connection to vacuum or inert gas lines.

Operation & Maintenance

User Guide

Before Use

Inspect for cracks, chips, or scratches on any joint
Check that the T‑bore stopcock rotates smoothly
Clean all joint surfaces with a soft cloth to remove particulates
Confirm that the joint sizes of all components match

Stopcock Operation

For glass stopcocks, apply a thin layer of vacuum grease if needed
PTFE stopcocks require no lubrication — use directly
Rotate the stopcock gently; avoid excessive force

Installation

Align the joint with the receiving port and gently twist into place
Use a clamp on the body of the T‑connector (not on the joints) for support
The 90° side arm can be connected to vacuum or inert gas lines
For vacuum applications, ensure all joints are well‑seated

Cleaning & Storage

Rinse immediately after use to prevent blockage
Use soft brushes and appropriate detergents for the inner channels
Air dry and store with protective paper between ground joints
Protect joints from impacts

T‑Shaped Connector · Selection Guide

Four key dimensions determine the right T‑connector for your system: joint size, stopcock type, stopcock bore, and application.

1. By Joint Size

Joint size determines compatibility with your existing standard taper glassware. GB/T, ASTM, and ISO designations are physically interchangeable.

Scale	GB/T	ASTM	ISO	Typical Volume	Matching Apparatus
Please contact us to confirm the available specifications.

2. By Stopcock Type

Glass Stopcock (Standard): Cost‑effective, suitable for most organic solvents. Ideal for routine organic synthesis and distillation.
PTFE Stopcock (Upgrade): Resists strong acids, bases, and aggressive chemicals. No lubrication required, excellent seal. Ideal for harsh chemical environments.

3. By Stopcock Bore Size

Bore size determines flow capacity.

Bore Size	Typical Application
Please contact us to confirm the available specifications.

4. By Reducing Configuration

When connecting instruments of different joint sizes, choose a reducing T‑connector.

Reducing Example	Description	Typical Use
Please contact us to confirm the available specifications.

Note: Custom reducing combinations are available — just tell us your requirements.

5. Quick Selection Checklist

Follow this decision flow to quickly identify the right configuration:

① Scale? Micro → 14# | Standard → 19# | Mid‑Scale → 24# | Large → 29#
② Media type? Organic solvents → Glass stopcock | Acids/bases/corrosive → PTFE
③ Flow rate? Low → 2mm | Medium → 4mm | High → 6mm
④ Reducing needed? Same sizes → Standard | Different sizes → Custom Reducing

✦ Need help selecting? Contact our technical support team with your experimental conditions and connection requirements — we'll recommend the optimal configuration.

Care & Notes

Show care & notes

Safety Precautions

Always operate in a fume hood when handling flammable or toxic gases
Verify joint integrity and glass strength before applying vacuum
Wear protective gloves and safety goggles

Do not

Never use cracked or damaged connectors under vacuum or pressure