Pump Pressures
Suction Pressure
The actual pressure, positive or negative at the pump suction connection as measured on a gauge.
Discharge PressureThe actual pressure at the pump discharge connection is measured on a gauge. It is equal to the pump suction pressure plus the total head developed by the pump.
Stuffing Box Pressure
The pressure acting on the stuffing box must be sealed. It is a function of pump impeller design and the presence or condition of wear rings.
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Purpose of this Guide to pump procurement
This Guide provides an introduction to the very complex subject of the selection of pumps. It is aimed at anyone who wishes to purchase or select a pump and, at the same time, wishes to save money on their energy bill. Almost invariably, this saving will be far more than the first cost of the pump. The reader may be the end user, a contractor, or a consultant. This Guide provides the reader with the basic principles of pump procurement, giving pointers to the pump type and performance they should consider. Pumps are divided into their main types, then their basic construction and performance are considered, their principal applications are described, the basic principles of pump selection are explained and, last but not least, target efficiencies are set to help minimize energy usage. The hope is that both pump users and the environment will benefit.
Guide To The Selection Of Rotodynamic Pumps
Purpose of this Guide to pump procurement
This Guide provides an introduction to the very complex subject of the selection of pumps. It is aimed at anyone who wishes to purchase or select a pump and, at the same time, wishes to save money on their energy bill. Almost invariably, this saving will be far more than the first cost of the pump. The reader may be the end user, a contractor, or a consultant. This Guide provides the reader with the basic principles of pump procurement, giving pointers to the pump type and performance they should consider. Pumps are divided into their main types, then their basic construction and performance are considered, their principal applications are described, the basic principles of pump selection are explained and, last but not least, target efficiencies are set to help minimize energy usage. The hope is that both pump users and the environment will benefit.
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In general, materials for the construction of the compressor and auxiliaries are normally the manufacturer's standard for the specified operating conditions except as required by the datasheet or certain specifications.
Chapter10. Compressors
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The compressor is the heart of a mechanical refrigeration system.
There is the need for many types of compressors because of the variety of refrigerants and the capacity, location and application of the systems.
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The compressor is the heart of a mechanical refrigeration system.
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Generally, the compressor can be classified into two basic types: positive displacement and roto-dynamic.
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Understand pump fundamentals
Understand the probable root causes of degradation or failure associated with various pump problems
Understand the state-of-the-art technologies to upgrade existing designs to achieve improved operation and life
Learn how to determine where a pump is operating and how to modify its performance to achieve optimum performance
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Objectives
Understand pump fundamentals
Understand the probable root causes of degradation or failure associated with various pump problems
Understand the state-of-the-art technologies to upgrade existing designs to achieve improved operation and life
Learn how to determine where a pump is operating and how to modify its performance to achieve optimum performance
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The most numerous types of fluid machineries are of the pump family (machines which add energy to the fluid), other important types are turbines (which extract energy from fluid). Both types are usually connected to a rotating shaft, hence also called turbomachineries. The prefix turbo- is a Latin word meaning ―spin’’ or ―whirl,’’ appropriate for rotating devices. The pump is the oldest fluid-energy-transfer device known. At least two designs date before Christ: (i) the undershot-bucket waterwheels, or norias, used in Asia and Africa (1000 B.C.) and (ii) Archimedes’ screw pump (250 B.C.), still being manufactured today to handle solid-liquid mixtures or to raise water from the hold of a ship. Paddlewheel turbines were used by the Romans in 70 B.C., and Babylonian windmills date back to 700 B.C. Since that time, many variations and applications of pumps have been developed. The power generating turbomachines (turbines) decrease the head or energy level of the working fluids passing through them and they are coupled to machines, such as electric generators, pumps, compressors etc.
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The most numerous types of fluid machineries are of the pump family (machines which add energy to the fluid), other important types are turbines (which extract energy from fluid). Both types are usually connected to a rotating shaft, hence also called turbomachineries. The prefix turbo- is a Latin word meaning ―spin’’ or ―whirl,’’ appropriate for rotating devices. The pump is the oldest fluid-energy-transfer device known. At least two designs date before Christ: (i) the undershot-bucket waterwheels, or norias, used in Asia and Africa (1000 B.C.) and (ii) Archimedes’ screw pump (250 B.C.), still being manufactured today to handle solid-liquid mixtures or to raise water from the hold of a ship. Paddlewheel turbines were used by the Romans in 70 B.C., and Babylonian windmills date back to 700 B.C. Since that time, many variations and applications of pumps have been developed. The power generating turbomachines (turbines) decrease the head or energy level of the working fluids passing through them and they are coupled to machines, such as electric generators, pumps, compressors etc.
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Think your fire pumps are just like the rest of your fluid movers? Think again. Rigorous standards and certifications make sure these life-savers are up to snuff
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Think your fire pumps are just like the rest of your fluid movers? Think again. Rigorous standards and certifications make sure these life-savers are up to snuff
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