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Materials
The exclusive use of mechanical tube without welding MW450 and E470HL at high mechanical strength supplied by two European producers Tenaris-Dalmine® and Mannesmann® allows us to get the sliding guide directly on the extension itself (Steel against steel). This feature is still unsurpassed on the market and the quality of our product differs from that of all other manufacturers that use plastic guide for the same purpose. This process offers an additional guarantee of reliability and safety of our products, allowing the maximum extension of the cylinder right to the end of the stroke and ensuring the mechanical stop in case of breakage of the end valve stroke, when it is used.
Technical specifications
The telescopic cylinders are made with seamless rolled tube big thickness:
E470 EN10297-1 Rm=650 N/mm² Rs=470 N/mm²
C45 EN10083 Rm=630 N/mm² Rs=370 N/mm²
base and ball socket joints in pressed steel:
S355J2G3 UNI 10025 Rm=510 N/mm².
S355JR UNI 10025 Rm=510 N/mm².
Seals
The specially shaped seals and scrapers are project by Di Natale – Bertelli S.p.A.:
Material : polyurethane: (Du Pont)
Maximum pressure 400 Kg/cm² (395 Bar)
Temperature from -40 to +110 C.
Maximum piston speed 0.5 m/s
Oil : Hydraulic oils and lubrificants mineral based.
Testing
The cylinders with working max. pressure 220 Bar, are subjected to final test of 240 Bar. (245 Kg/cm²)
The cylinders with working max. pressure 200 Bar, are subjected to final test of 220 Bar. (225 Kg/cm²)