Reference value for mechanical seal compression amount

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Reference values for mechanical seal compression: Seal type, Seal model, Compression amount (mm), Remarks. Large spring, unbalanced GX type: 4–6; Large spring, balanced GY type: 4–6; Large spring, balanced U212: 5–6; Large spring, balanced U2500: 9.5–11.5; Large spring, balanced UK2875, UK3250, UK3625: 4.8±0.5 (without pre-compression); Large spring, balanced UK3375: 7–9; Bellows type DBM: 4–6.5; Small spring, balanced DTM5: 5±0.5; Small spring, balanced types 119B, 109B, 59B, C8B, H7N, FO2d, B12: 124±0.5; Small spring, unbalanced types 59U, C8U; Large spring, balanced type 1523: 2–5 after spring compression (without pre-compression); For large spring seals, the compression amount depends on the length of the spring; Large spring, unbalanced types 106U, 108U, BIA, EX; Other bellows-type seals: 5±0.5; Other small spring seals: 4–5. Note: 1. For special seals (or in special situations), the compression amount is determined based on the operating conditions of the equipment or the requirements of the manufacturer. 2. The compression amount of the modular mechanical seal is determined during assembly by the sealing team, and this information is provided to the installers during on-site installation.