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The cylinder tube is made of brass, a material which has higher resistance to pressure than aluminium. Double seals are inserted on each cylinder head to compensate the micro leaks which occur after many working hours. To facilitate the bleeding of air, inclined bleed screws are installed on top of the cylinder heads. The piston rod is made of stainless steel, chromed and rectified; the chromium plating in a protected environment guaranties a high quality plating, and an excellent protection against the marine corrosion, combined with a very smooth surface guarantees a long endurance of the seals. The chromium helps to eliminate at least 30% of the friction caused by the use of seals and its hardness protects the piston rod from accidental scratches which could damage the seals. The support is made of brass.

We recommend a 600mm as minimum diameter of the wheel.