Installation of centrifugal pumps
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Data for the centrifugal pump: flow rate of 6, head of 16, power of 0.75. The pump base is made of cement, with bolt holes of 4-Φ14 diameter. 1. During installation, if the pump foundation does not have pre-installed anchor bolts (only a cement foundation has been poured), how should the pump be installed? What size bolts should be used? Are expansion bolts being used? 2. If embedded foundation bolts are used, how is the pump installed? Do I just need to tighten the nut? Guru, please help me! ! (I’m preparing a material list; I don’t know what type of bolts should be used for the pump, nor what size they should be.) ）
This post was last edited by ylb913 on 2016-9-4 13:21. Is the diameter of the bolt holes in the pump base Φ14? Then the bolts used should be M12. If there are no embedded bolts, it is fine to use expansion bolts for pumps with such low flow rates and outlet pressures. If you embed bolts, it’s not enough to just screw on nuts; shims need to be used to level things out, and then grouting should be applied again beneath the base.
For M12 expansion bolts, what length should be chosen? (Pump foundation height: 100 mm)
This post was last edited by ylb913 on 2016-9-4 at 13:40. 1. The length of common M12 bolts should not exceed 100 mm, but it is rare for the foundation height to be 100 mm (the usual requirement is 200 mm); in some cases, the burial depth may even be several hundred millimeters. The thickness of concrete for non-load-bearing floors is generally 100 mm, while that for load-bearing floors should be at least 200 mm. 2. Let’s take a practical example; you can decide what to do based on it: We have a pump with a flow rate of 48 m3/h and an outlet pressure of 0.45 MPa. Since the two magnetic pumps selected for use as backups in the design had a high failure rate, and repair times were long after each failure, we added a third pump, which was fixed to the ground using expansion bolts. It has been in use for over a decade without any problems. The thickness of the concrete floor in this area is supposed to be 100 mm; it’s unlikely to be 200 mm thick. ——The thickness of the cement floor is an issue; the lower part of expansion bolts always needs to be secured with cement, as soil cannot provide such fixation.
If the small pump doesn’t have foot bolts, use expansion bolts directly; if it does, use a level to ensure proper fixation
This post was last edited by svenzheng on 2016-9-5 07:39. You can simply use expansion bolts; if there are no holes for the feet, use a drill to create them yourself. Because your pump has a low power rating, foot bolts are not required
Okay, thank you all, I’ve learned it!