Hydraulic and pneumatic sealing solutions

bmg's Hallite

BMG supplies an extensive range of hydraulic and pneumatic seals and sealing solutions for demanding environments. BMG is also the only official distributor for Hallite Seals International Ltd within Central and Southern Africa.

“Hallite sealing systems are manufactured from robust materials which include nitrile rubbers, rubber and fabric compounds and thermoplastic elastomers – all proven to keep a system free from external contamination,” says Marc Gravett, business unit manager of BMG’s Seals and Gaskets division. “Hallite’s design engineers and material technologists give careful attention to seal profile design and material selection. Product properties are methodically studied to ensure that the finished component has the required qualities to cope efficiently in harsh operating conditions.

“Seals are subjected to extensive testing that reproduces continuous operating conditions where leakage, dynamic and breakout friction are recorded and performance factors like pressure, speed and temperature are carefully monitored.”

Included in this range rod and gland seals, piston and static seals, as well as support and bearing components, which are constantly upgraded to keep abreast with changing market demand.

Although these piston seals have been designed especially for one piece pistons, they are also suitable for two piece pistons. The type 780 is similar to the popular DAS seal.

These double-acting 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 multi-lips for efficient and 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 support rings – which are manufactured from a tough, flexible polymer – and the L-shaped bearings are grooved to ensure that the fluid’s pressure properly energizes the sealing element and also prevents pressure-trapping within the seal assembly.

BMG, which has been exclusive distributors in Southern Africa for Hallite Seals for over 35 years, provides a technical advisory and support service in all sectors.