Specifications

90° Vacuum Adapter · Specifications

Standard sizes are listed below. All products comply with GB/T, ASTM, and ISO standard taper systems. Full range 10/19 ~ 60/45 available. Custom joint types, stopcock configurations, and fritted options are available.

Request custom specs

1. Inner Joint 90° Vacuum Adapter (without Stopcock)

GB/T	ASTM	ISO	Hose O.D. (mm)	Material
Please contact us to confirm the available specifications.

2. Outer Joint 90° Vacuum Adapter (without Stopcock)

GB/T	ASTM	ISO	Hose O.D. (mm)	Material
Please contact us to confirm the available specifications.

3. 90° Vacuum Adapter (with Glass Stopcock)

GB/T	ASTM	ISO	Stopcock Bore (mm)	Hose O.D. (mm)	Joint Type	Material
Please contact us to confirm the available specifications.

4. 90° Vacuum Adapter (with PTFE Stopcock)

GB/T	ASTM	ISO	Stopcock Bore (mm)	Hose O.D. (mm)	Joint Type	Material
Please contact us to confirm the available specifications.

5. 90° Vacuum Adapter (Fritted)

GB/T	ASTM	ISO	Frit Specification	Stopcock Type	Joint Type	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.
* Full range 10/19 ~ 60/45 available upon request.
* Outer joint (male) and inner joint (female) configurations available.
* Standard stopcock bore is 2mm; custom bore sizes available upon request.
* Contact our sales team for MOQ and lead time on custom orders.

✦ Customization Services — We offer custom joint sizes, outer/inner joint types, stopcock materials, and fritted disc options. Share your specific requirements and our technical team will provide a tailored solution.

Product Description

The 90° vacuum adapter is a specialized bent interface component for vacuum evacuation and gas exchange in standard taper glassware systems. Its distinctive 90° elbow design positions the hose connection at a right angle to the lower joint, providing a significant advantage in space‑constrained experimental setups. The top features a 90° elbow hose connection for attaching vacuum pumps or inert gas supplies, while the bottom features a standard taper joint (outer or inner) for secure connection to reaction vessels or distillation apparatus. Optional glass or PTFE stopcocks provide precise flow control, and G1/G2 fritted disc options prevent solid particles from entering the reaction system. The 90° elbow design not only saves vertical space but also prevents tubing kinks, ensuring smooth gas flow.

Key Features

Borosilicate Glass 3.3: Meets ISO 3585, low thermal expansion, thermal shock resistance up to 280°C, excellent chemical durability
Multi‑Standard Compliance: Precision‑ground 1:10 taper meets GB/T, ASTM E, and ISO 3585 standard taper specifications for full interchangeability
90° Elbow Design: Saves vertical space, prevents tubing kinks, ideal for confined experimental environments
Flexible Joint Options: Available in outer joint (male) or inner joint (female) configurations
Multiple Control Options: No stopcock (straight‑through), glass stopcock (organic solvent compatible), or PTFE stopcock (acid/base resistant, no lubrication)
Fritted Option Available: Built‑in G1/G2 fritted disc prevents solid particles from entering the reaction system

Quality Assurance

Each 90° vacuum adapter is inspected for taper accuracy, elbow angle calibration, and seal integrity to ensure reliable connection with all standard joint components. Custom bulk orders are welcome.

Tip: The 90° vacuum adapter is ideal for space‑limited experimental setups. Ensure joints are clean and dry before connecting to vacuum systems. PTFE stopcocks require no grease.

Applications

Typical Uses

Vacuum Evacuation

Connect to vacuum pumps for reaction evacuation — 90° elbow design saves vertical space

Inert Gas Exchange

Connect to N₂/Ar supplies for inert atmosphere operations

Schlenk Line Operations

Gas inlet/outlet for switching between vacuum and inert gas

Distillation Systems

Vacuum interface for reduced‑pressure distillation in space‑limited setups

Flow Control

Regulate gas flow rates using the stopcock

Compatible Equipment

Standard joint flasks, receiving vessels, reaction tubes

Distillation heads, fractionating heads, condensers

Schlenk lines, vacuum manifolds

Vacuum pumps, inert gas cylinders

Tip: The 90° vacuum adapter is particularly suitable for space‑limited experimental setups. Always use matching standard joint sizes for optimal sealing.

Operation & Maintenance

User Guide

Before Use

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

Installation

Outer Joint Type: Insert the outer joint into the receiving flask inner joint and gently twist to seat
Inner Joint Type: Fit the inner joint over the distillation head outer joint and gently twist to seat
Connect the 90° elbow hose fitting to vacuum or inert gas lines using appropriate tubing
The 90° elbow design saves vertical space — adjust tubing routing to avoid kinks
For vacuum applications, ensure all joints are well‑seated

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

Cleaning & Storage

Clean immediately after use to prevent blockage
Use soft brushes and appropriate detergents for the elbow hose fitting and joint
For fritted versions, take extra care to clean the frit area thoroughly
Air dry and store with protective paper between ground joints
Protect joints from impacts