Description
Check valve made of PE-HD for 6–9 mm tubing inner diameter is a compact laboratory fluid-control component that allows flow in one direction only. Fabricated from high-density polyethylene (PE-HD / HDPE), the valve is intended for integration into flexible tubing lines used in general laboratory fluid handling. It accepts tubing with an inner diameter in the 6–9 mm range, matching common laboratory hose sizes for simple push-on connections. The PE-HD body provides a lightweight, corrosion-resistant alternative to metal fittings and is suited to aqueous media and many mild laboratory chemicals. Supplied as a single piece from manufacturer Hecht, the check valve supports straightforward assembly of sampling lines, transfer tubing and basic process loops where backflow prevention is required. Its robust polymer construction withstands routine laboratory handling while remaining easy to install or replace. Ideal for teaching labs, quality-control benches and routine analytical setups that rely on unidirectional flow control without complex valve hardware.
This article is part of HPLC accessories, in HPLC columns & accessories.
Key features
- Pack size: 1 pc(s)
- Product type: Check valve
- Material: PE-HD (HDPE)
- Tubing I.D. range: 6–9 mm
- Construction: High-density polyethylene
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Questions about Non-return valve of HDPE, for tubing of 6 - 9 mm inside diam.
What is this article?
Non-return valve of HDPE, for tubing of 6 - 9 mm inside diam. is the article on this page. Luminix Health distributes Hecht for laboratory use. It sits in HPLC accessories, inside HPLC columns & accessories, in Chromatography equipment.
HPLC accessories are the unions, the ferrules, the lamp and the mixer parts around the pump and the detector. A ferrule that has been swaged on one fitting does not reseal on another. The part has to be the one for that thread and that tubing.
An HPLC column is a tube packed, or coated, with a stationary phase. The sample is carried through it by a liquid, and the compounds leave at different times. The phase, the particle size, the length and the internal diameter decide the separation. A guard column is a short sacrificial piece in front of the analytical column. Fittings and tubing have a bore that either preserves the peak or smears it. Compound names follow IUPAC. Data are on PubChem. Method grades often cite the European Pharmacopoeia or USP.
Which category should I open next?
The category is HPLC columns & accessories. The sub-category is HPLC accessories. The catalogue is Chromatography equipment.
Shelves beside this one are HPLC columns, HPLC fittings, tubing & inline filters and HPLC guard columns.
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.
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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.

