Non Asbestos Gaskets

Although a Klinger agency company, EAS not only supplies and converts Klingersil branded sheet material, but is also able to supply other branded materials including Flexitallic/Novus, Reinz, Donit, Garlock, Walker, Beldam, Hecker, Freudenberg etc. We are also able to cross-reference most non-asbestos materials – including many grades from Europe, South America, India and the Far East and offer alternatives for materials not easily accessible – or for those where brand loyalty or distribution agreements make base materials superficially high to competing convertors. In addition to branded materials EAS supply unbranded materials compliant to international standards. If you would like a copy of our reference list please contact info@easeals.co.uk.
 

The Material

In the gasket industry, we mostly define Non-Asbestos materials as sheet materials originally designed to replace Asbestos sheet materials – typically used in applications with higher temperatures, sealing against oils or chemicals, and medium pressures. After Asbestos was banned during the 1980’s and 90’s in the UK, the new ‘non-asbestos’ variants began to emerge – blending different base fibres with rubber cured through a calender system to produce compressed sheet. Today we also include some roll-form materials as ‘non-asbestos’ also (often called ‘beta’ materials)– these differ slightly in that they are made mostly from pulp base and produced much the same say as paper. Most grades of material today include anti-stick surfaces to help with removal of the gasket during any refurbishment work, and for higher pressure or high-vibration applications, wire or metal foil reinforcement is used.

 klinger3  nonasb  orange5
 

Producing Gaskets

EAS convert non-asbestos materials by various methods – predominantly by conventional hydraulic press cutting using standard ‘ribbon-steel’ cutting tools. The types of machine use range from manual ‘swing-beam’ presses, through to twin-beam and high pressure four pillar presses up to high volume production automatic machines including state-of-the-art travelling head presses where materials are belt fed, and nesting software ensures minimum waste with the tool-head rotating to locate and cut parts at the highest possible speeds.

Other equipment used to convert includes slitters and washer-punching machines for all capacities – while tool-less production equipment such as drag-knives and water-jet is particularly useful for low-volume production or where tolerances are tight – thicker materials are being cut, or where holes are close to edges and press cutting would not be feasible due to material fractures.

 orange1  Gasket Cutter  img_3400
 

Combination Products

Non-Asbestos gaskets can also be combined with other materials – the most common would be bore protection in chemical applications, where PTFE ENVELOPES are used to wrap round the id of the gasket to protect it from harsh chemicals passing through the pipe-line. On high-temperature applications, or where burning is a risk – metal ‘fire-rings’ or ‘eyelets’ can be added to reduce the effect of over-heating. Other applications may require the materials to be sandwiched with other resilient materials to produce specific insulation properties, or simple adhesive backing can be added to aid fitting of parts in awkward conditions.