1. The required tools need to use special tools when removing the old packing and replacing it with a new one. Botai and pre-tightening the nut with a fastener. In addition, standard safety facilities and related safety regulations must be used frequently.
Before installing the ZYB booster fuel pump, first familiarize yourself with the following equipment: the cutting machine for checking the packing ring, the torque wrench or wrench, the safety helmet, the internal and external calipers, the lubricant of the fastener, the mirror, the packing extractor Cut the root of the cutter, vernier caliper, and so on.
2. Cleaning and inspection. Slowly loosen the gland nut of the stuffing box, release all residual pressure in the packing assembly, remove all old packing, thoroughly clean the packing box of the shaft/rod; check the shaft/rod for corrosion, dents, scratches Or excessive wear; check other parts for burrs, cracks, and abrasion, which will reduce the life of the packing; check the stuffing box for excessive clearance and the eccentricity of the shaft/rod; replace parts with large defects; Check the old packing for the basis of the failure analysis to find the cause of the early failure of the packing.
3. Measurement and recording. Record the diameter of the shaft/rod, the pore size and depth of the stuffing box, and when using the oil seal ring, record the distance from the bottom to the top of the stuffing box.
4. Choose the packing. Ensure that the selected packing should meet the operating conditions required by the system and equipment; calculate the cross-sectional area of ​​the packing and the number of packing rings required according to the measurement records; check the packing to ensure that it is free of defects; ZYB booster fuel pump Make sure the equipment and packing are clean before installation.
5. Preparation of the packing ring. Braided packing is wound around a properly sized shaft, ZYB booster fuel pump or calibrated packing ring cutter; cleanly cut packing in pairs to be mated (square) or mitered (30-45 degrees) ), cut a ring at a time, and check if the size is appropriate with a shaft or stem.
Mold the packing to ensure that the ring fits precisely to the shaft or stem and, if necessary, cut the packing ring according to the packing manufacturer's instructions or requirements.
6, install the packing. Carefully install one packing ring at a time, and surround each ring around the shaft or stem. Before installing the next ring, the ZYB booster fuel pump should ensure that the ring is fully seated in the stuffing box, the next ring Should be staggered, at least 90 degrees apart, generally requiring 120 degrees. After the top ring is installed, tighten the nut by hand and press the cover evenly. If there is an oil seal ring, check that it is at the correct distance from the top of the stuffing box. Also ensure that the shaft or stem is free to rotate.
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