Mechanical seal for kettle Technical requirements for main parts

1. Requirements for flatness and roughness of seal face

2. The parallelism between the sealing end faces of the stationary ring and the moving ring and the end faces of the auxiliary sealing ring shall comply with the level 7 tolerance in GB1184~80 Regulations on Form and Position Tolerances without Individual Tolerance Indications

3. The surface roughness of the contact between the stationary ring and the moving ring and the auxiliary seal ring shall not be lower than Ra3.2 (D 6) according to JB4127-85), and the tolerance of the outer circle or inner hole size shall be h8 and H8

4. The perpendicularity of the stationary ring seal end face to the outer circle contacted by the stationary ring auxiliary seal ring and the perpendicularity of the inner hole contacted by the moving ring seal end face and the moving ring auxiliary seal ring shall comply with the level 7 tolerance in GB1184-80

5. Silicon nitride seal ring and aluminum oxide seal ring for sealing shall be respectively in accordance with JB/JQ9012-85 Technical Conditions of Silicon Nitride Seal Ring for Mechanical Seal and JB/JQ9013-85 Technical Conditions of Aluminum Oxide Ceramic Ring Blank for Mechanical Seal, and cemented carbide seal ring for sealing shall be in accordance with ZBJ22003-88 Cemented Carbide Seal Ring Blank for Mechanical Seal, Carbon graphite sealing rings for sealing shall comply with the provisions of ZBx x x x x x - X X Technical Conditions for Carbon Graphite Sealing Rings for Mechanical Seals, and sealing rings of other materials shall comply with the provisions of relevant standards

6. Graphite ring, filled polytetrafluoroethylene ring and assembled dynamic and static rings shall be subject to hydrostatic inspection. Inspection pressure: the sealing ring used for unbalanced mechanical seal is 1MPa; The seal ring used for balanced mechanical seal is 2.4MPa, and the duration is 10min. There should be no leakage