Product Description
Fine, repeatable flow control is the main reason vacuum chemists choose this threaded straight valve over a ground glass stopcock. A precision external thread lets you crack it open as a bleed up to half a turn, and it is fully open at one and a half turns.
This listing is for Kimble catalog number 826500-0004: HI-VAC Straight Valve, with PTFE Plug and Tip O-Ring, Bore Range 0-4 mm. The borosilicate glass 3.3 body houses a non-rotating PTFE shaft that seals with an FKM O-ring against a tapered seat, so no grease is needed. The shaft is rated for continuous use at 230 C and intermittent use at 275 C. Several bore ranges are offered to suit different line sizes. Order it from LIGHT LABS and keep your lab stocked with genuine DWK Life Sciences products.
Key Features
- Precision thread – External thread gives fine adjustment and acts as a bleed up to half a turn
- Grease-free seal – FKM O-ring on a tapered seat forms the primary seal
- Non-rotating PTFE shaft – Reduces wear on the seat and O-ring during repeated cycling
- High temperature rating – Shaft rated to 230 C continuous and 275 C intermittent
- Borosilicate body – Glass 3.3 resists thermal shock and chemical attack
Specifications
| Catalog Number | 826500-0004 |
| Brand | Kimble (DWK Life Sciences) |
| Description | HI-VAC Straight Valve, with PTFE Plug and Tip O-Ring, Bore Range 0-4 mm |
| Sold As | Each |
| Body Material | Borosilicate glass 3.3 |
| Plug Material | PTFE |
| O-Ring Material | FKM |
| Configuration | Straight (180 degree) |
| Operating Temperature | 230 C continuous, 275 C intermittent |
| Full Open | 1-1/2 turns |
Available Options
- 826300-0020 – HI-VAC Straight Valve, with PTFE Plug and Tip O-Ring, Bore Range 0-20 mm
- 826500-0012 – HI-VAC Straight Valve, with PTFE Plug and Tip O-Ring, Bore Range 0-12 mm
Applications
- Schlenk lines and vacuum manifolds
- Inert gas handling
- High-vacuum glass apparatus
- Solvent transfer under vacuum
- Custom glassblowing assemblies
