Parker Introduces HL Profile Rod Seals
Parker-Pradifa has unveiled the HL profile series of rod seals. Their pressure-activated, cascading dynamic sealing lips, in combination with P6030, a sealing material, reduce static and dynamic friction. Compared with conventional U-rings, the Ultrathan HL rod seal can reduce friction-related losses by 30 to 70 per cent, depending on load. The resulting higher efficiency of hydraulic systems leads to significant energy savings. Friction-optimised seals for hydraulic cylinders also cut costs related to downtime and maintenance. The HL profile causes the sealing edges of the dynamic sealing lips to successively contact the mating surface as system pressure rises. This significantly reduces friction in the pressureless state and in low-pressure conditions. The sealing effect increases with the number of sealing edges. At the same time, dynamic friction slightly increases as the contact area enlarges. Overall, however, it remains at a very low level. Since only the primary sealing edge i...