W201B Die Fored Graphite Rings:It is made of low-sulpher expanded graphite without any fillers or binders .They are compressed in precise moulding tools to the required density. Due to the high purity of the material (>99%), no special corrosion protection is required. In general, it has square section and also has V-shaped and wedge-shaped section, the rear two kinds style are suitable for high pressure sealing.
W201R Reinforced Graphite Ringsn:. Moulded from pure flexible graphite with reinforcement, the insert materials stainless steel foil or mesh etc. are available on request. To protect against
oxidation, the stainless steel cap is necessary.