We keep sufficient quantities of long term items in stock and are thus able to respond flexibly and very quickly to current requirements or urgent delivery needs. We also maintain an extensive stock of raw blanks and materials used in production. Thanks to this, we are able to solve even urgent cases efficiently and we are able to carry out production within hours.
In the case of long-term cooperation, we offer our customers not only quantity discounts but also other preferential business conditions.
Seal design and mechanics – basic information
When designing a solution, several factors must be taken into account to determine the ideal choice of profile and material.
These are mainly pressure, temperature, speed, chemical environment, friction, method of treatment of functional surfaces and other factors.
Based on these factors, we select the sealing element that ideally meets the requirements of the application and guarantees a high sealing effect and durability.
Surface quality requirements for functional areas
Particular attention should be paid to the surface design of the functional surfaces.
The purpose is to ensure a surface quality that minimizes abrasion and wear on the seal.
The piston rod seal, which seals against the moving surface, can be damaged by fine abrasive particles which may adhere to the rough surface. Therefore, the bars should have a low surface roughness value, and the surface should be similar to hard chrome and rust-proof. The ideal surface roughness is somewhere around 0.3 µm (Ra) or 2.3 µm (Rt).
The piston seal, which seals against the inner surface of the cylinder, is not exposed to the same range of abrasive particles entering from the atmosphere and can therefore handle rougher surfaces. The ideal surface roughness is somewhere around 0.5 µm (Ra) or 3.7 µm (Rt). The operating pressure must be taken into account when assessing the surface properties. At higher operating pressures, the film between the seal and the sealing surface is thinner and friction is greater. Under such operating conditions, the least possible surface roughness should be selected.
The surface quality for static sealing should be around 1 µm (Ra) or 7 µm (Rt).
Detailed information on construction, design and other technical information can be found in our catalogue.
Offering a related range and combination of technologies
In addition to the manufacture and sale of sealing elements for hydraulic and pneumatic applications, we also offer other products and services.
These are mainly flat seals, rubbers, rubber profiles, mechanical seals, sealing cords and other products.
Thanks to this, we can provide effective solutions even for complex assemblies where the sealing of the equipment must be solved by combining different elements and using different production technologies.
For general information on the function of the hydraulic cylinder and how to solve its sealing, see for example this link or this video.