Stenso - Hovedkatalog 2019

15 General Technical Information Guidelines for assembly of PTFE rod seals To provide safe and proper assembly, please follow the technical information and specified measurements, tolerances and surface values strictly. Initially the O-ring is inserted in the groove (for rods up to 30 mm of nominal diameter we recommend the use of open groove or a small radial cross-section as it is important during fitting in closed groove.). The rod seal is now carefully bent to a kidney shape, inserted in the groove and resized first by hand and then with a suit- able resizing tool. Ametallic/POM conical mandrel can also be used to resize the profile sealing ring. The mandrel contains a wedge sha- ped recess at the front end. A recess can be pre-cut into the ring. The ring can subsequently be inserted into the groove as specified above. The seal diameter must be resized, it is best is to resize just before fitting the rod into the gland. Storage of rubber products (Also refer DIN 7716) During storage, vulcanized rubber products tend to undergo a change in their physical characteristics subject to influen- ce of oxygen, ozone, light, heat and/or moisture. Careless storage can damage rubber products leading to hardening, softening, cracks,etc.,which render the product useless.Careful compliance to the following suggestions can reduce the damage to rubber components providing providing prolonged life. Temperature Store room temperature may not exceed +25°C. Constant exposure to low temperatures (also below 0°C) does not harm rubber products. If rubber articles need to be taken out of the store room at sub zero temperatures, they should first be warmed to +20°C. Oxygen - Ozone Whenever possible, vulcanized rubber products must be protected from ambient environment using suitable packa- ging such as storage in air-tight bags. This specifically applies to rubber articles with larger surface area and volume. Ozone attacks rubber, therefore the storage roommust never contain electrical equipment that promotes the generati- on of ozone. Gland O-Ring PTFE Seal Resizing Tool Initial Position Ring deformed to kindney shape