Grasso RC 11 and RC 12 Metal Bellow Seals From Seal Family MB1 are commonly used for Compressors, MB1 provides a high degree of axial flexibility to compensate for lack of concentricity of the shaft or misalignment due to thrust movement of the shaft. Moreover, these seals are used for high temperature application such as refinery, Petrochemical, and Oil & Gas industries. These seals do not have a dynamic o rings eliminating the fretting of Shaft or Sleeve. Salient features: Welded Diaphragm Bellow Design Suitable for High Temperature Media. Axial compensation of movement 1 mm. Perfect for standardization purposes. No Dynamic O Rings Inherently Balanced Design Applications: Specially used in paper and pulp Industries, petrochemicals, petroleum refinery etc. Material: Seal Faces: Ceramic/Sic/Carbon Vs Ceramic/RB Sic./TC Secondary Seals: Viton/PTFE/GFT/FFKM Metal Components: SS-316/Hast-C/Carpenter-42 Bellow: AM-350/Hast-C276/Inconel-718