Table of Contents
What is pump balancing line?
The balancing line is at the suction pressure, where it receives the liquid condensate that increased in temperature through pumping for eight stages. This combination of temperature gain and exposure to low pressure can cause the high vapor pressure condensate to flash.
What is balance leak off line in boiler feed pump?
Balance leak off line is used to balance the centrifugal pump shaft from axial thrust. During pump operation, especially in multistage centrifugal, suction will have less pressure compared to discharge.
How does a pump balance drum work?
The balancing device on centrifugal pumps is designed to fully or partially compensate axial thrust generated by the pump rotor. This pressure loss results in an axial force acting upon the balancing device which counteracts the impeller’s axial thrust and effects the required balancing.
What is the purpose of the pump minimum flow line?
The purpose of minimum flow is generally to prevent undue wear and tear or damage to the pump. In the real environment of a process or utility plant, a pump is operated at just about any condition demanded by the situation at hand.
How does a balance line work?
Balance line typically goes from a high pressure tapping to the low pressure end of the compressor to help “balance” out the thrust forces. As it involves moving parts and seals there is some leakage.
When the circulation of water in boiler is by centrifugal pump then the boiler is known as?
forced circulation boiler
Explanation: When the circulation of water, in a boiler, is by a centrifugal pump, then the boiler is known as forced circulation boiler.
How do you balance a pump?
Pump impellers are generally balanced by removing material, by drilling, milling, or grinding. Horizontal overhung balancers can be fitted with grinding correction (Photo 1). This method spreads the material removal process over a large area with minimum depth.
What is balancing disc?
A balance disk is a cushion can be used in fitness training as the base for core, balance, and stretching exercises. It is also known as a stability disc, wobble disc, and balance cushion. The third use for a balance disk is as a seat cushion for active sitting, similar to using an exercise ball as a chair.
Why is deadheading a pump bad?
When a centrifugal pump is dead-heading, it can lead to explosions, due to the energy being put into the liquid in the pump. Hydraulic overpressure and possible chemical reactions in the pump can also be caused by the overexertion of pressure.
Why do feed pumps have a balance and recirculation line?
Mostly feed pumps are provided with balance and recirculation lines just to maintain required flow of liquid for the process. If the flow of liquid is more for the process and we cannot reduce the RPM of the pump recirculation line /balance line comes for the work which in turn maintain required flow.
What is the purpose of balance leak off line in pump?
Balance leak off line is used to balance the centrifugal pump shaft from axial thrust. During pump operation, especially in multistage centrifugal, suction will have less pressure compared to discharge.
What will happen if the pump is operated at less flow?
If pump is operated at less flow than the minimum continuous stable flow, it will damage bearing and pump will start vibration and it will make noise. Below the minimum continuous thermal flow, temperature of fluid will rise at faster rate. To avoid these problems, minimum recirculation line is provided.
What is a recirculation loop on a pump?
Recirculation lines provide a means of relief for high pressure pumps when operated against a closed valve or other system obstruction. Meeting minimum flow and protecting the pump against deadheading conditions are the main reasons why recirculation loops are installed. But, they can also help keep product in a desired state.