Beschreibung
Pressure relief/check valve with cone NS 29/32 is a dual-function laboratory safety valve fabricated from borosilicate glass 3.3. In pressure-relief mode a spring-loaded ball joint works together with a higher-viscosity sealing liquid to maintain tightness. The spring pressure is adjustable, and the maximum overpressure is limited to 0,1 bar. Used as a check valve under vacuum, the unit incorporates a built-in riser tube that prevents contamination by the sealing liquid. When handling especially aggressive media, the spring can also be covered with an inert liquid for added protection. This versatile component from manufacturer Rettberg is intended for laboratory glassware assemblies that need reliable overpressure protection and vacuum backflow prevention. The NS 29/32 ground joint fits standard laboratory systems. Delivered as a single piece with a net weight of 0,201 kg, it serves chemical and research laboratories requiring controlled pressure management and safe vacuum operation in everyday experimental setups.
This article is part of Stopcocks & valves, in Tubing, hoses & fittings.
Key features
- Pack size: 1 pc
- Joint size: NS 29/32
- Material: Borosilicate glass 3.3
- Product type: Safety valves
- Max. overpressure: 0,1 bar
- Technical Information Sheet:
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Questions about Safety / overpressure valve, cone size 29/32
What is this article?
Safety / overpressure valve, cone size 29/32 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Stopcocks & valves, inside Tubing, hoses & fittings, in Laborbedarf.
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 Laborbedarf.
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.