Composite Bearing Options

GRAPHALLOY® – For Pump Applications

As part of the Graphite Metallizing Group, Exalto can now offer GRAPHALLOY as part of its bearing portfolio. GMC is a long-established American company who specialise in the manufacture of bearings and industrial products using their patented Graphalloy® material – a unique graphite/metal alloy which is used the world over to solve the toughest bearing problems.

What makes it superior?

• Self-Lubrication – it can handle low lubricity fluids such as light hydrocarbons, liquefied gases and hot water in which metallic bearings can wear excessively
• Dry Running – survives dry starts, flashing and loss of suction for prolonged periods without damage
• Extreme Temperatures – continues to perform in applications at cryogenic temperatures to -450°F without becoming brittle or seizing, up to 1000°F+, well above the limits of plastic, surviving thermal shock
• Wet – self-lubricating so there is no additional lubricant to wash away, it resists attack by most corrosive liquids such as Sulfuric Acid, Hydrochloric Acid, Chlorine Water and caustics
• Non-Galling – Survives high speed contact that would gall metal parts – it permits closer running clearances between rotating parts resulting in lower shaft vibration
• Improved Efficiencies – Allows closer running clearances which can provide higher pump efficiencies through reduced vibration
• Dimensionally Stable – Maintains dimensional stability when submerged, under load and over wide temperature ranges providing a constant running clearance

MARITEX – For Marine or Pump Applications

Maritex is a composite bearing material made of a unique blend of fibre, resin and lubricants. It is little-known but growing in popularity every year, attracting attention due to its superior performance and vast applications across industries.

Why is Maritex superior?

• Runs Dry – thanks to its unique composition it is self-lubricating
• Resists marine growth thanks to its surface chemistry
• Operates at low and high temperatures – it is used by military vessels as a bearing as it simply won’t fail, even under extreme heat
• Pressure moulded & fibre reinforced and not fibre wound – so will not delaminate
• Superior strength and lubricity means it will not creep
• Operates effectively for high load, low speed applications
• Lloyds or WRAS approved grades available

Available in many different grades, we can always recommend the best solution for your given application – whether that be something very specific such as the requirements of US Navy Submarines, or a basic marine application where rubber-lined bearings do not last due to operating conditions such as silty water.

Talk to us today about Maritex and how it can help you.