News & events


Double-acting piston seals

1st Quarter 2011 News & events

BMG has introduced the Hallite double-acting piston seals to its range of sealing products.

These have a robust assembly for efficient operation, reduced wear resistance and extended service life on any hydraulic cylinder application.

Although designed for one piece pistons, they are also suitable for two piece pistons. The type 780 is similar to the popular DAS seal. The advanced assembly ensures efficient sealing in medium duty applications in diverse industries.

The seals consist of a nitrile rubber sealing element, two split support rings and two split L-shaped bearings – one of each is located on either side of the seal. The sealing element is designed with multilips for efficient dynamic sealing with minimal low pressure friction. When pressurised, the lips of the support ring are extended to protect the system from extrusion damage.

The L-shaped bearings and the support rings, which are manufactured from a tough, flexible polymer, are grooved to ensure that the fluid pressure energises the sealing element properly and also prevents pressure trapping within the seal assembly.

The seals are able to withstand operating conditions with a maximum speed of 0,5 m/sec, a temperature range from – 30°C to +100°C and a maximum pressure of 400 bar.

For more information contact Ken Steel, BMG, +27 (0)31 576 6288, [email protected], www.bmgworld.net



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