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I am looking into the problem of positioning dual fuel boilerplant in the vicinity of hazardous areas eg. gas boosters, especially in respect of the risks posed by incandescent smuts from the chimney. Whe the boilerplant is switched over from Biogas to fuel oil (diesel), incandescent smuts can...

Thanks Artisi. The motors are fixed speed, so no change will be possible there. I was thinking along the same lines as you. 1. Reduce the pitch of the blades which will reduce the flow and head and hence the torque required and power consumed 2. Change the gearing in the gearbox to give you...

There have been problems since pumps were first commissioned. The pumps are 1400mm diameter, 8000l/s with 330kW motors running around 300 rpm.

I am having some problems with large axial flow pumps, generating a lot of torque and power and the gearboxes are running very hot. One possible option worth trying is to reduce the speed of the pumps a fraction, and hence the torque and power decrease by factors fo 2 and 3 respectively. This...