Description
2/2-way ball valve, manual on/off, DN 40 KF is a laboratory vacuum accessory for isolation and flow control in systems that use KF flange connections. The valve offers a two-port configuration that is opened or closed by hand, supporting routine handling of vacuum lines and process tubing in research and analytical laboratories. It is supplied as one piece, suited to replacement or expansion of setups built around DN 40 KF interfaces. With ball-valve construction and manual actuation, the component fits bench and apparatus layouts where operators need direct control without automated drives. This accessory from manufacturer WELCH belongs to the range of accessories and spare parts for laboratory equipment and is intended for use with compatible vacuum pumps, manifolds and related KF hardware. The DN 40 KF flange size matches medium-diameter vacuum plumbing commonly installed in laboratory environments. The 2/2-way design provides distinct open and closed states for gas or vapour paths during sample work, system evacuation or maintenance. Laboratories can specify the valve wherever a compact manual shut-off element with KF geometry is required.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Valve type: 2/2-way ball valve
- Operation: Manual on/off
- Connection: DN 40 KF
- Product group: Accessories and spare parts for laboratory equipment
- Function: Isolation and flow control
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Questions about 2/2-Way Ball Valve, Manual On/Off, DN 40 KF
What is this article?
2/2-Way Ball Valve, Manual On/Off, DN 40 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.