EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of EN ISO 6624-2 testing. This standard specifies the basic dimensional characteristics of half keystone rings made of cast iron, types HK, HKB and HKBA are used in reciprocating internal combustion piston engines for road vehicles and other applications with nominal diameters from 38 mm to (inclusive) 160 mm. .
The common properties and size tables presented in this section of EN ISO 6624 create a wide range of variables, and when choosing a particular ring type, the designer should keep in mind the conditions under which it will be required to operate.
An outward-expanding circular iron spring fits into a piston groove, sealing against the gas or liquid pressure difference between the circumferential and side faces of the ring and the bore and piston groove. The keystone ring is used where ring sticking can be expected. Due to its wedge shape, any radial movement of the ring will change its axial clearance, thus minimizing combustion residue build-up.
A piston ring manufacturer's quality and production data can be agreed upon batch coding with an appropriate identification code for each ring so that the piston rings can be accessed at any time after delivery before the first engine start-up. Traceability down to the single ring level is not intended. The scope of data to be documented and coding methods will be agreed between the customer and the manufacturer.
EUROLAB assists manufacturers with EN ISO 6624-2 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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