Hydraulic presses and dies

Preparation of solid pellets requires a hydraulic press. Together with a die, a stable pellet can be produced with a fine surface, suitable for measurement with XRF. Some materials are fine and bind together well, without the need for a binding additive. Most samples however will require a suitable additive and/or aluminium cup, proir to pressing, to obtain a stable and dust free pellet.

For consistent and repeatable results, it is likely that special equipment will be needed to mix or grind the sample to the correct particle size. A range of mixing and grinding equipment, binders and caps is available to suit your application. Please contact us if you need help in the choice of binder and sample preparation method

The most common diameters of pellet for XRF are 32 and 40mm. For good results, a 15 tons should be used for producing 32mm pellets and 25 tons for 40mm pellets

Specifications (presses)

Maximum Pressure 15 / 25 tons, electrical 25 tons
Pressure display 0 - 20 t / 0 - 30 t
Piston 108 mm
Piston Stroke, max 25 mm
Bolster Screw diameter 30 mm
Bolster Screw Travel, max 90 mm
Minimum Distance Between Pressing Faces 35 mm
Maximum Distance Between Pressing Faces 125 mm
Area size D310 x W290 mm
Weight 50.5 kg, electrical 60 kg

For use with the press, a wide range of  Evacuable Pellet Dies, used for compacting powdered samples into disks or briquettes, is available. These are of the highest quality, made from 440C hardened stainless steel

Larger die sizes (32 / 40mm) are commonly used in briquetting samples for XRF and XRD analysis and many other industrial applications. Halide disks for infrared analysis are usually produced with the smaller size dies. All of the dies are equipped with nitrile O-ring seals and an evacuation port to allow for the removal of moisture, if desired, during the pressing process.

The most common die sizes are indicated below. Other sizes are available, on request.

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