Description
3/2-Way Ball Valve, Manual On/Off, DN 25 KF is a laboratory vacuum accessory for manual directional flow control on KF small-flange lines. This three-port ball valve lets operators switch pathways and isolate sections of a vacuum or process-gas circuit without automated actuators, which is practical on the bench and during routine system changes. The DN 25 KF connection matches widely used clamp-style vacuum hardware, so the valve can be integrated into manifolds, pump forelines, and instrument interfaces that already follow the KF standard. Manual on/off operation gives direct tactile control for setup, maintenance, and simple routing tasks in research and industrial laboratory environments. Offered as a single piece from manufacturer WELCH, it belongs among accessories and spare parts for laboratory equipment and is intended for new builds as well as replacement of existing valves. Compact KF geometry supports standard centering-ring and clamp sealing practice common in laboratory vacuum infrastructure. The unit quantity is one piece, ready for installation where a DN 25 KF 3/2-way manual ball valve is specified.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Product type: 3/2-way ball valve
- Operation: Manual on/off
- Connection: DN 25 KF
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Questions about 3/2-Way Ball Valve, Manual On/Off, DN 25 KF
What is this article?
3/2-Way Ball Valve, Manual On/Off, DN 25 KF is the article on this page. Luminix Health distributes WELCH for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Labware.
A stopcock opens and closes a line, or directs it between ports. Glass stopcocks have a ground plug that needs grease or a PTFE key. The bore decides the flow. A two-way and a three-way key are different parts.
Tubing is how a liquid or a gas moves between two vessels without being poured. Silicone stays flexible and survives repeated autoclaving. PTFE resists almost every solvent and is stiff. PVC is the ordinary flexible line for water and for mild aqueous work. The fitting, not the tube, is what usually leaks: the barb, the thread and the stopcock have to match the tube bore. Glass and plastic apparatus around these lines is indexed under ISO laboratory ware.
Which category should I open next?
The category is Tubing, hoses & fittings. The sub-category is Stopcocks & valves. The catalogue is Labware.
Shelves beside this one are Hose connectors, adapters & fittings, PVC, PTFE & other tubing, Silicone tubing and Tubing accessories.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.