1. What is cavitation?

The increasing speed of the water entering into a pump will cause a reduction in pressure within a unit. If this pressure decreases below a certain point or is too low, some of the water flowing in the unit will begin to vaporize, forming bubbles entrained in the liquid. These bubbles will then collapse dramatically as they move to areas with higher pressure creating the vibration and noise from the pump.
You can identify if a pump is cavitating if it is making knocking vibrations or noises (like pumping gravel) while running. Other common signs of cavitation may be erratic power consumption or fluctuations or reductions in pump output.
It sounds as though someone is hitting the pipe with a sledgehammer.
No. The quantity of water and the pressure (head) produced by a centrifugal pump is linked to the rotation speed, the diameter of the impeller and the size of the vanes.
A centrifugal pump speeds water off the tips of the vanes of the impeller. The centrifugal forces will still accelerate the water when an impeller runs backwards — though far less efficiently. A backward running pump will supply less water at reduced pressure, typically consuming less electricity. If the impeller is attached to the shaft, when operating backwards, it may unscrew.
Do not allow a centrifugal pump to function at zero flow for a long time. The impeller's friction will cause water to boil, the mechanical seal may heat up and ultimately "burn up," all plastic components will melt away, and water may leak into the windings of the engine. In residential structures, the pressure switch shuts down the pump when the pressure is high, which implies low or no flow.
There is no set standard which sets any particular limits for the minimum flow in pumps. But it is recommended that centrifugal pumps should not be operated at a flow rate of less than 50% of their ideal efficiency point. If a flow rate of 50% or less is required by the pump, use a recirculation line to raise the flow through the pump, maintaining the pressure low in the scheme. If however, a pump is operated at low flows, it could overheat quite rapidly and cause vibration, cavitation, noise and mechanical damage.


1. Does TFT’s warranty cover any damages or wear & tear caused in the pump?

TFT’s warranty only covers the physical and chemical properties of the pump. We also guarantee the chemical composition of the pump.
Yes. TFT can support and help with all import substitution services. With our development team of reverse-engineering expertise, TFT can reproduce and replicate a product as original as existing.
TFT provides service and support for all kinds of pumps until installation & commissioning of the pump.
From centrifugal pumps, screw pumps to submersible pumps and AODD pumps, TFT can offer pumps for any kind of application. For more details, please go through our products brochure on our website.
Yes, TFT has actively engaged with global markets and we are pursuing our export business all over the globe.
TFT can offer reverse engineering services for import substitution, erection & commissioning contracts and consultancy services.
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