Durametallic® VRA和VRA-C密封安装说明.pdf

Installation Instructions Durametallic® VRA & VRA-C Series Outside balanced seals designed to operate under relatively high pressures and low speeds Experience In Motion 1 Equipment Check 1.1 Refer to Figure 1 for shaft, sleeve and seal housing requirements. Seal Chamber Requirements Figure 1 Shaft or sleeve OD ±0.025 mm (±0.001 inch) Face of seal housing/vessel to be square to the axis of the shaft to within 0.5 mm To first (0.020 inch) FIM and have obstruction a 1.6 µm (√ 63 µinch) Ra finish or better • Bearings, drive, and coupling must be in good condition • Maximum axial movement of shaft (end play) = 0.25 mm (0.010 inch) FIM • Maximum combined shaft concentricity and shaft deflection at face of housing total = 03.8 mm (0.150 inch) FIM 1.2 Refer to assembly drawing included with seal package for specific seal design, materials of construction, dimensions, and piping connections. 1.3 Check shaft or sleeve OD, box bore, and box depth to ensure that they are dimensionally the same as shown on the seal assembly drawing. 1.4 Check gland pilot and bolt holes to ensure they are adaptable to the equipment and are the same as shown on the assembly drawing. 1.5 Seal Faces: While all seal parts are manufactured to precise tolerances, the sea