Product Description
When a reaction must be fed at a steady pace under vacuum or inert gas, a constant addition funnel keeps delivery controlled. This funnel can be refilled without breaking the system and equilibrates for vacuum use, while the jacketed version lets you heat viscous or solidifying reagents with steam.
This listing is for Kimble catalog number 634620-0250: Constant Addition Funnel, 250 mL. Funnels are made from 33 expansion low-extractable borosilicate glass meeting USP Type I and ASTM E438 Type I, Class A. They have a 19/22 refill valve stopper with a special bore for equilibration, a 24/40 bottom joint, an FKM O-ring probe seal and graduations numbered up and down. The 634630 series adds a steam jacket with 3/8 inch hose connections. Add it to your LIGHT LABS order alongside the rest of your glassware and closures.
Key Features
- Refillable under vacuum – 19/22 refill valve has an equilibrating bore.
- Dual-direction graduations – Numbered up and down for easy reading.
- Steam jacket option – 634630 series heats contents via 3/8 inch hose connections.
- Moderate vacuum use – Suitable for operation under moderate vacuum.
- Instructions included – Supplied with operating instructions.
Specifications
| Catalog Number | 634620-0250 |
| Brand | Kimble (DWK Life Sciences) |
| Description | Constant Addition Funnel, 250 mL |
| Sold As | Each |
| Material | Borosilicate glass 3.3, low extractable |
| Glass standards | USP Type I; ASTM E438 Type I, Class A |
| Refill valve | 19/22 standard taper |
| Bottom joint | 24/40 |
| Probe O-ring | FKM, size 110 |
| Jacket | Steam jacket on 634630 series, 3/8 inch hose connections |
Available Options
- 634620-0060 – Constant Addition Funnel, 60 mL
- 634630-0125 – Constant Addition Funnel, 125 mL, Overall Height: 300mm
- 634630-0500 – Constant Addition Funnel, 500 mL
Applications
- Continuous reagent feeding
- Vacuum and inert-atmosphere reactions
- Addition of viscous or heated reagents
- Process chemistry
