Montage-related issues

One possible cause can occur in the pre-assembly phase. If the piston rod is placed on sharp steel supports without protection, the rod's weight can create high peak pressures that can effectively 'break' the coating even before the rod is assembled. Another potential cause may arise during assembly by carelessly sliding or moving the rod, particularly in conjunction with high surface pressure, such as using steel wheels or ball bearings.

Alignment errors

Misalignment can result in extreme surface pressures when the piston rod is forced against the side of the cylinder head during initial operation. This error can also cause damage to the cylinder head itself.

Load factors

Horizontal or lateral loading, especially when the rod's weight rests on guide bands, can lead to band wear. Prolonged loading (creep) can cause direct contact between the coating and the steel cylinder head, resulting in high surface pressures, especially during the initiation of movement.

To prevent these issues, we recommend:
- Using large support surfaces to minimize surface pressure.
- Opting for clean, soft (rubber) wheels.
- Avoiding over-determined constructions, but if unavoidable, carefully align and inspect after assembly.
- Checking concentricity.
- Using new seals and guide bands with minimal creep and maximum mechanical load capacity during cylinder overhauls.

At Griekspoor Thermal Coatings, we are prepared to assist and provide on-site advice if desired. Please feel free to contact us for further support.