Macherey-Nagel pleated filter, type MN 617, high quality, fast-filtering (Ø 55 mm – 500 mm)

Macherey-Nagel MN 617 pleated filters represent a system solution optimised in terms of materials science and highly efficient in terms of geometry, designed for rapid clarification, coarse particle separation and general sample preparation in day-to-day laboratory work. Available in an extremely wide range of diameters, from 55 mm for small-scale analytical batches up to large-area 500 mm filters for high-volume separation processes, this filter series caters for every scale of modern laboratory processes. For routine filtration in food analysis, environmental chemistry or industrial quality control, the structural purity and fibre stability of the filter paper are the primary criteria for clarifying media in a way that is gentle on the material, contamination-free and process-reliable.

Maximum filtration rate thanks to pre-pleated geometry

The design and fluid-mechanical foundation of this series lies in its ready-to-use pleated structure. Unlike traditional round filters, which must first be laboriously folded twice before being inserted into the funnel, the pre-formed pleat pattern multiplies the effective filtration surface area. This leads to a drastic reduction in filtration times during daily high-throughput operation. With a standardised filtration rate of approx. 9 seconds according to the manufacturer’s specification, the MN 617 grade enables an extremely rapid liquid throughput. Flow resistance is minimised, thereby gently reducing unwanted blocking effects in viscous or particle-rich sample flows.

High wet tear strength and the purest raw material base

From a materials science perspective, the MN 617 grade is based on refined pulp and high-quality linters, which are processed entirely free from chemical binders or additives. The smooth surface structure ensures a homogeneous non-woven fabric that exhibits excellent inherent mechanical stability. Thanks to optimised fibre entanglement, the filters possess remarkable wet tear strength. They withstand the fluid-mechanical pressure during funnel filtration without damage and do not tend to release fibres into the filtrate. With a typical ash content of approximately 0.1 per cent, the paper is perfectly suited to qualitative analytical procedures where ash-free incineration is not strictly required.

Cost-effective routine use and full GLP compliance

The infrastructural validity of the MN 617 pleated filters is demonstrated by their reliability in recurring routine tasks. As the filters are supplied pre-pleated and ready for use, laboratory staff save valuable working time whilst simultaneously minimising the risk of contamination from manual folding. For laboratory managers and quality management officers in regulated B2B environments, Macherey-Nagel’s range provides a reliable basis for documentation and validation, enabling recurring test processes and certifications to be carried out reliably in accordance with GLP guidelines.

Technical details

Material Science & Filter Structure

• Filter type: High-quality filter paper / pleated filter (pre-configured and ready for use)
• Grade / Quality level: MN 617
• Material basis: Refined alpha-cellulose and the purest linters
• Binder status: 100 per cent binder-free (free from chemical additives)
• Surface structure: Smooth
• Filtration properties: Fast filtration (open-pored structure for coarse precipitates)
• Filtration rate: approx. 9 seconds (standardised according to manufacturer’s specifications)
• Ash content: approx. 0.1 per cent (qualitative classification)

Physical properties & dimensions

• Basis weight: approx. 85 grams per square metre (85 g/m²)
• Filter thickness: approx. 0.22 mm (millimetres)
• Available diameter range: 55 mm to 500 mm
• Diameter variants in the range: 55, 70, 90, 110, 125, 150, 185, 240, 270, 320, 385, 400, 450, 500 mm

Resistance & Compliance

• Chemical resistance: Inert to mild acids, alkalis and a wide range of organic solvents
• Wet tear strength: High (structurally stable under liquid load)
• Quality management: Supports standardised, reproducible routine filtration processes in accordance with GLP

Contents

• 1 x pack of Macherey-Nagel pleated filters, grade MN 617, high-quality and fast-acting (standard contents: 100 pieces per box) in the diameter selected by the customer (55 mm to 500 mm).

Individual requirements & accessories

To ensure the optimal integration of Macherey-Nagel pleated filters into your daily laboratory routine, we offer a comprehensive range of complementary accessories. For traditional gravity filtration, we stock chemically highly resistant glass funnels (60-degree angle) made from borosilicate glass, as well as matching Erlenmeyer flasks and laboratory beakers for collecting the filtrate. For contamination-free and precise handling of the sensitive filter elements, we recommend flat-tipped filter tweezers made from high-alloy stainless steel. For structured filtration series, we also offer robust funnel stands and sleeves. Please make use of our technical procurement service to design your analytical infrastructure to suit your specific needs.