drill cfrp
PRE-LAB QUESTIONS
1. Define shut off head.
Shut-off head is a condition, when a centrifugal pump runs with discharge valve closed.
When a serviced pump is to be tested for its performance, we are running pump with different discharge condition to ensure that the pump is capable of performing as designed.
Shut-off head is the maximum head generated by a centrifugal pump with zero flow and relatively less power. Because it has to overcome very small head[upto discharge valve],less frictional losses and inertia loads. So, shut off head is a part of the charactoristic curves.
Caution: Dont run the centrifugal pump for a prolonged period in shut-off condition ,or else the liquid will get vaporise and pump will run dry and damaged the important part of the pumps like mechanical seal/gland packings,bearing ,etc.
Pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.
Pumps operate by some mechanism (typically reciprocating or rotary), and consume energy to perform mechanical work by moving the fluid. Pumps operate via many energy sources, including manual operation, electricity, engines, or wind power, come in many sizes, from microscopic for use in medical applications to large industrial pumps.
Mechanical pumps serve in a wide range of applications such as pumping water from wells, aquarium filtering, pond filtering and aeration, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers. In the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis.
Science the beginning, the man has been trying to find some convenient ways of lifting
1. Define shut off head.
Shut-off head is a condition, when a centrifugal pump runs with discharge valve closed.
When a serviced pump is to be tested for its performance, we are running pump with different discharge condition to ensure that the pump is capable of performing as designed.
Shut-off head is the maximum head generated by a centrifugal pump with zero flow and relatively less power. Because it has to overcome very small head[upto discharge valve],less frictional losses and inertia loads. So, shut off head is a part of the charactoristic curves.
Caution: Dont run the centrifugal pump for a prolonged period in shut-off condition ,or else the liquid will get vaporise and pump will run dry and damaged the important part of the pumps like mechanical seal/gland packings,bearing ,etc.
Pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.
Pumps operate by some mechanism (typically reciprocating or rotary), and consume energy to perform mechanical work by moving the fluid. Pumps operate via many energy sources, including manual operation, electricity, engines, or wind power, come in many sizes, from microscopic for use in medical applications to large industrial pumps.
Mechanical pumps serve in a wide range of applications such as pumping water from wells, aquarium filtering, pond filtering and aeration, in the car industry for water-cooling and fuel injection, in the energy industry for pumping oil and natural gas or for operating cooling towers. In the medical industry, pumps are used for biochemical processes in developing and manufacturing medicine, and as artificial replacements for body parts, in particular the artificial heart and penile prosthesis.
Science the beginning, the man has been trying to find some convenient ways of lifting