For the sealing of pumps and valves , in heavy duty applications such as anti-extrusion rings and in the presence of fluids such as steam , oils , acids with the exception of nitric and sulfuric acids .
Characteristics and properties
These seals , are obtained from a tape of pure expanded graphite cut to size obtained from a roll, ns . METAGRAPH enriched with a corrosion inhibitor .
Then wrapped spiral INSIDE tHIS of a mold , is printed through a hydraulic press , to be brought to the degree of required density ( 1.2 – 1.7 – 2.0 g/cm3) .
The graphite tape can also be coupled to a perforated plate of stainless steel : 304 -316 – monel – inconel – zinc and nickel to ensure a greater resistance to high pressures.
Products are rectangular , trapezoidal or special request of the customer , or can be supplied with a beaded metallic reinforcement wherever there are strong thermo-mechanical shock .
They are made from a minimum diameter of 10.0 mm . Up to a max. of 2200.0 mm .