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Sealing system for mobile plant cylinder rams

A Trelleborg Sealing Solutions product story
Edited by the Engineeringtalk editorial team Jul 17, 2000

Busak+Shamban has pioneered many sealing advances in conjunction with hydraulic equipment manufacturers including the development of a complete sealing system for mobile plant hydraulic cylinders

Extreme operational demands are placed on mobile off-road hydraulics sealing and bearing systems.

Often there is a requirement for the plant to operate in extremes of dirt and temperature, with lengthy periods between servicing and maintenance.

Advances in sealing technology now enable off-road plant and equipment manufacturers to choose hydraulic systems which are capable of providing unfailing operation in the most extreme environments, with minimal maintenance.

Busak+Shamban has pioneered many of these advances in conjunction with hydraulic equipment manufacturers.

Examples of these sealing solutions for tough operating conditions include the development of a complete sealing system for mobile plant hydraulic cylinders.

The requirement was to develop a sealing system for mobile plant cylinder rams operating with a system pressure of 32 MPa (4640 psi).

The sealing systems needed to fit ISO compliant grooves and provide a service life exceeding 10,000 hours.

Since the equipment manufacturer takes pride in marketing environmentally-friendly machinery, zero fluid leakage was a design prerequisite, together with the use of bio-oils.

Busak+Shamban engineers developed two compatible sealing systems for both the rod and piston.

Piston sealing comprised Turcon Glyd Ring with Luytex and Turcite Slydring and the rod system used Turcon Stepseal K and Zurcon Rimseal in tandem arrangement with Luytex and Turcite Slydring and double acting scraper Turcon Excluder 500.

The sealing system which has been developed meets all design parameters and has proved unfailing in operating cycles exceeding 10,00 hours.

An alternative piston sealing arrangement developed by Busak+Shamban engineers for a major excavator manufacturer was required to cope with a maximum hydraulic system pressure of 32 MPa / 4,640 psi and a diametral clearance up to 1.1 mm (0.04 in.) The system developed involved the use of Turcon Glyd Ring T with Luytex and Turcite Slydring .

In this heavy duty operation, the sealing system has proved successful with the seals exhibiting no discernable signs of wear or extrusion.

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