• Double Angular Necked Flask

Double Angular Necked Flask

FL3865-A

  • Lab and Research

Vendor: OMSONS

Suited For: Lab and Research

Country of Origin: India

30-Day Limited Warranty
This product is covered against manufacturing defects in materials and workmanship for 30 days from the date of purchase.

This warranty does not cover: breakage caused by thermal shock (rapid heating or cooling); physical or mechanical damage, including drops, impacts, chips, and cracks from handling; damage from use outside the glassware's rated temperature, pressure, or chemical compatibility; damage from improper cleaning; normal wear such as scratching, staining, or discolouration; or unauthorised repair or modification.

To claim, contact SmartLabs within 30 days of purchase with proof of purchase and a description of the defect.
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R 225.00
R 225.00
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Double Necked Flask (Two Neck Boiling Flask or Two Neck Round-Bottom Flask) made of borosilicate glass.  Joint neck allows for connection to distillation apparatus or other glassware adapters. Angled neck useful for refilling or inserting a thermometer with a thermometer adapter.  Recommended to use with Glassware Joint Clips to hold glassware connectors, adapters, and distillation connectors firmly in place while in use.

Please select appropriate volume and joint size in the drop down menu.

Key Features
  • Material: High-duty Borosilicate 3.3 Glass, providing excellent thermal shock resistance.
  • Joints: Equipped with interchangeable ground glass conical joints (sockets) for vacuum-tight connections.
  • Capacities: Commonly available from 100 ml up to 20,000 ml (20L).
  • Typical Joint Sizes: Combinations such as 24/29 center with 19/26 side joints are standard.
Key Configurations
OMSONS offers two primary neck orientations for different spatial and equipment needs: 
  • Angular Necks: The center neck is vertical, while the two side necks are 180° apart and inclined at a 20° angle. This is ideal for adding reagents via dropping funnels or inserting thermometers without interfering with a central condenser.
  • Parallel Necks: The center neck and both side necks are vertical and parallel to each other. This setup is often preferred for mechanical stirring where multiple vertical shafts or probes are required.
Common Applications
The three necks allow for a multi-functional experimental setup: 
  1. Space Management: The 20° tilt of the side neck provides extra room to attach bulky equipment (like a large dropping funnel) without it hitting the apparatus in the center neck.
  2. Ease of Addition: The angled side neck makes it easier to add liquids or powders manually while the flask is positioned under a fume hood or inside a heating mantle.
  3. Probing: It is the preferred design for inserting thermometers or gas inlet tubes, as the angle allows the probe to reach towards the center of the flask's boiling liquid.
Usage Tip
When using a Mechanical Overhead Stirrer, always use the center neck for the stirring shaft. The angular side necks should be reserved for stationary items like gas inlets or temperature probes to avoid interference with the rotating shaft.

Spesification

  • Design: Angular Two-Neck
  • Material: Clear 3.3 Borosilicate Glass 
  • Size: Select from drop down
  • Joint Size: Select from drop down
  • Stopper: Not supplied
  • Printing: white enamel markings (acid and scratch-resistant).
  • Brand: OMSONS
  • Product of India

Available Stoppers

Centre Socket : 19/26

  • Solid Rubber stopper for 19/26: RS9-S 17x20x26mm
  • 1 Hole Rubber stopper for 19/26: RS9-1H 17x20x26mm
  • 2 Hole Rubber stopper for 19/26: RS9-2H 2Hole 17x20x26mm
  • Glass Stopper 19/26: GRS6860/3 Glass Stopper 19/26

 Centre Socket : 24/29

  • Solid Rubber stopper for 24/29: RS13-S 23×26.5x28mm
  • 1 Hole Rubber stopper for 24/29: RS13-1H 23×26.5x28mm
  • 2 Hole Rubber stopper for 24/29: RS13-2H 2Hole 23×26.5x28mm
  • Glass Stopper 24/29: GRS6860/4 Glass Stopper 24/29

Side Socket : 14/23

  • Solid Rubber stopper for 14/23: RS7-S 13x16x24mm
  • 1 Hole Rubber stopper for 14/23: RS7-1H 13x16x24mm
  • 2 Hole Rubber stopper for 14/23: RS7–2H 13x16x24mm
  • Glass Stopper 14/23: GRS6860-2

Specifications

Material: Borosilicate 3.3 Glass
Capacity: 100mL to 20000mL (20L)
Typical Joint Sizes: 24/29 Center with 19/26 Side Joints

Delivery

We deliver nationwide across South Africa. Once your order is on its way, you'll receive a tracking link by email so you can follow its progress. If you need your order urgently or you're delivering somewhere hard to reach, contact our team before you check out and we'll help where we can.

Warranty

This product is covered against manufacturing defects in materials and workmanship for 30 days from the date of purchase.

This warranty does not cover: breakage caused by thermal shock (rapid heating or cooling); physical or mechanical damage, including drops, impacts, chips, and cracks from handling; damage from use outside the glassware's rated temperature, pressure, or chemical compatibility; damage from improper cleaning; normal wear such as scratching, staining, or discolouration; or unauthorised repair or modification.

To claim, contact SmartLabs within 30 days of purchase with proof of purchase and a description of the defect.

Our Promise

At SmartLabs, we only stock equipment we'd trust in our own labs and classrooms. If a product arrives faulty or doesn't match its description, let us know and we'll make it right, whether that's a replacement or a refund. Our goal is for every order to work exactly as it should, the first time.