Harp Screens

In general terms, harp screens will screen at double the rate of the equivalent aperture woven wire. They are used for difficult-to-screen materials, where blinding and pegging make screening with square mesh difficult.

Harp screens increase productivity. They make screening of sticky and damp materials possible, where screening with a woven mesh would be impossible.

Why harp screens work;

• Increased open area, up to 90 percent
• No cross wires, therefore no corners for fines to build from
• Smaller diameter wires than mesh, so less surface area for fines to adhere to

Until now harp screens have been only available on mobile screening plants. Now, with the introduction of Symphony Wire’s Cross Harp, harp screens can now be fitted to any side-tensioned vibrating screen, without modification to the screen body.

A cross harp wire screen (piano screen) is made up of single strands of straight, highly tensioned wire, connected at either end of the screen with a sheet metal hook. Spacer strips sit over the top of capping rubbers to maintain correct aperture. This produces a long, uninterrupted slot between the capping rubbers.

Benefits of the cross harp:

• Cross harps increase productivity — more tons per hour for each square foot of screen area than any other screen surface
• Cross harps make screening of sticky and damp materials possible where, screening with a woven product would be impossible — you could be screening a product no one else has been able to offer
• Cross harps allow screening at smaller apertures than would otherwise be possible when screening difficult materials - your product could be of better quality than your competition or worth more per ton

Your harp screens are custom made to order according to your needs – which means you get the best possible service and advice available. Because we make your harp screen to order, we offer a greater range of aperture and wire choices than any other supplier. For more information on harp screens please view our brochure or contact us.