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You have to increase the suction head, or decrease the speed of the pump. As you may know, cavitation happens when the static pressure at the pump inlet minus the equivalent pressure of the fluid velocity in the pump drops low enough to vaporize fluid. To prevent it, the static pressure needs to be higher or the velocity needs to be lower.
What else can I help you with?
What is the use of recirculation line in boiler feed pump?
A recirculation line in a boiler feed pump is used to return part of the pumped water back to the inlet of the pump. This helps to prevent cavitation and maintain a steady flow of water through the pump. Cavitation is a phenomenon that can occur in pumps when the pressure of the water being pumped drops below the vapor pressure of the water. When this happens, bubbles of vapor can form in the pump, which can cause damage to the pump and reduce its efficiency. The recirculation line helps to prevent cavitation by returning part of the water that has been pumped back to the inlet of the pump. This increases the pressure of the water at the inlet, which helps to prevent the formation of vapor bubbles. As a result, the pump can operate more efficiently and reliably. Overall, the use of a recirculation line in a boiler feed pump helps to prevent cavitation and maintain a steady flow of water through the pump. This can improve the performance and reliability of the pump.
Why the Deaerator is placed at height and mostly at 15.5mtr?
By putting deaerator at height, vapour doesn't form at the suction area of feed water pumps so cavitation phenomenon in the impeller can be prevented. also to get NPSH.
Advantages of gear pump?
Gear pumps are a type of positive displacement pump that are appropriate for pumping relatively high pressures and low capacities. Advantages include the ability to handle a wide range of viscosity, less sensitivity to cavitation (than centrifugal style pumps), relatively simple to maintain and rebuild. Disadvantages can include a limited array of materials of construction due to tight tolerances required, high shear placed on the liquid, and the fluid must be free of abrasives. Also note that gear pumps must be controlled via the motor speed. Throttling the discharge is not an acceptable means of control .
What are the types of centrifugal pumps?
The four centrifugal pumps are the charging pump, sand pumps, shear pumps, and submersible slurry pumps. The machines are used for fluid transportation by rotational kinetic energy to hydrodynamic energy conversion.
What is balance mechanical seal?
Balance mechanical seal is a arrangement in centrifugal pumps that is provided to prevent leakage and corrosion of pump outer shaft. A cooling arrangement is also provided for mechanical seal.
Why minimum flow of recirculation is provided in pumps?
to avoid cavitation
Can cavitation prevent gas flow into a liquid due to high speed mixing?
No
Will faulty foot valve restrict supply of water?
faulty foot valve will lead to absence of water column in a line. this gives rise to cavitation in pumps. As a result, suction of pumps is affected.
What is caviation?
Cavitation is the formation of vapour cavities in a liquid, caused by rapid changes in pressure. These cavities collapse with great force, leading to damage in equipment and machinery operating in the liquid. Cavitation can occur in pumps, propellers, and other hydraulic systems.
Why can't fuel pumps be longer?
Fuel pumps must not be too long because of the circulation of the gasoline. Too much can heat up the gasoline and cause performance issues and cause cavitation to the pump.
Why line reducer is used for centrifugal pumps?
cavitation formed wen concentric reducer in used. but wat is the use of reducer in the both suction and discharge side of the pump. if we dost use (conc & ecc) reducer in the both sides.. there is not effect on pump
How the cavitation in reaction turbines can be avoided?
Cavitation in reaction turbines can be avoided by ensuring that the turbine is properly designed and operated within the specified operating conditions. Proper selection of materials, maintaining the right flow rate, and avoiding sudden changes in pressure can also help prevent cavitation. Regular maintenance and inspection of the turbine are important to detect and address any signs of cavitation early on.
What are the two types of cavitation?
The two types of cavitation are inertial cavitation and non-inertial cavitation. Inertial cavitation occurs when rapid changes in pressure cause the formation and collapse of bubbles. Non-inertial cavitation involves the stable growth and collapse of bubbles due to continuous low-pressure conditions.
What is cavitation and priming?
1. PRIMING LOSS: This is the suction loss for a pump whose NPSH is (-ve)2. CAVITATION: It is also suction loss by forming cavity of a volatile liquid whose NPSH(a) is belowNPSH(r) eg..Choking or blockage of suction strainers, closing of suction valve of apump when running.3. VAPOUR LOCK: This is also loss of pumping due to blockage in discharge of a pump..closing of discharge valve and running for more time..running the pump with in adequate minimum flow..liquid above boiling pointHence Cavitation, Vapour Lock and Primimng loss are different
What is the use of recirculation line in boiler feed pump?
A recirculation line in a boiler feed pump is used to return part of the pumped water back to the inlet of the pump. This helps to prevent cavitation and maintain a steady flow of water through the pump. Cavitation is a phenomenon that can occur in pumps when the pressure of the water being pumped drops below the vapor pressure of the water. When this happens, bubbles of vapor can form in the pump, which can cause damage to the pump and reduce its efficiency. The recirculation line helps to prevent cavitation by returning part of the water that has been pumped back to the inlet of the pump. This increases the pressure of the water at the inlet, which helps to prevent the formation of vapor bubbles. As a result, the pump can operate more efficiently and reliably. Overall, the use of a recirculation line in a boiler feed pump helps to prevent cavitation and maintain a steady flow of water through the pump. This can improve the performance and reliability of the pump.
When was Emerson Cavitation Tunnel created?
Emerson Cavitation Tunnel was created in 1949.
Why the Deaerator is placed at height and mostly at 15.5mtr?
By putting deaerator at height, vapour doesn't form at the suction area of feed water pumps so cavitation phenomenon in the impeller can be prevented. also to get NPSH.
