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It is also known as an "All or Nothing Flow characteristic".

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129 pág.

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In a regulation loop, the final adjustment component is usually an automatic valve which, by acting on the flow-rate of a fluid (gas or liquid), enables the measured value to be regulated:
Pressure
Flow-rate
Level
Temperature, etc.

The valve is broken down into two separate assemblies:
The body
The actuator

The actuator can be:
A simple hand wheel: this is known as a "manual" valve or a "hand" valve,
An electromagnet: with two states, energized or not energized; this is an all or nothing electric valve,
A cylinder,
An electric motor,
A servomotor: This is the name generally given to the device located above the body, and which functions with pneumatic power.

This is the law that represents the flow-rate as a function of the displacement of the plug (or shutter), for a constant ΔP.

Rangeability defines the ability of a valve to control low flow-rates. This means that a valve with a rangeability of 100 will be capable of controlling a minimum flow-rate that is 100 times less than the maximum flow-rate.

The size of the regulating valve body is proportional to the displacement of the shutter.

There are two body types:
Longitudinal bodies: Translational displacement of the shutter. Usually known as "Linear Valves",
Angular bodies: Rotational displacement of the shutter. Usually known as "Rotary Valves".

Mecânica

It is also known as an "All or Nothing Flow characteristic".

Total_Mechanical_Course_Valves_Actuators_1636284465

Respostas

Ainda com dúvidas?

Essa pergunta também está no material:

Total_Mechanical_Course_Valves_Actuators_1636284465

In a regulation loop, the final adjustment component is usually an automatic valve which, by acting on the flow-rate of a fluid (gas or liquid), enables the measured value to be regulated:
Pressure
Flow-rate
Level
Temperature, etc.

The valve is broken down into two separate assemblies:
The body
The actuator

This is the law that represents the flow-rate as a function of the displacement of the plug (or shutter), for a constant ΔP.

Rangeability defines the ability of a valve to control low flow-rates. This means that a valve with a rangeability of 100 will be capable of controlling a minimum flow-rate that is 100 times less than the maximum flow-rate.

The size of the regulating valve body is proportional to the displacement of the shutter.

There are two body types:
Longitudinal bodies: Translational displacement of the shutter. Usually known as "Linear Valves",
Angular bodies: Rotational displacement of the shutter. Usually known as "Rotary Valves".

These weak forces improve the stability of the valve, which means that a smaller diameter servomotor can be chosen for a valve of the same capacity.

The piston is balanced, because the downstream pressure acts on both sides of these faces.

Mais conteúdos dessa disciplina

Mecânica

It is also known as an "All or Nothing Flow characteristic".

Total_Mechanical_Course_Valves_Actuators_1636284465

Respostas

Ainda com dúvidas?

Essa pergunta também está no material:

Total_Mechanical_Course_Valves_Actuators_1636284465

In a regulation loop, the final adjustment component is usually an automatic valve which, by acting on the flow-rate of a fluid (gas or liquid), enables the measured value to be regulated:PressureFlow-rateLevelTemperature, etc.

The valve is broken down into two separate assemblies:The bodyThe actuator

This is the law that represents the flow-rate as a function of the displacement of the plug (or shutter), for a constant ΔP.

Rangeability defines the ability of a valve to control low flow-rates. This means that a valve with a rangeability of 100 will be capable of controlling a minimum flow-rate that is 100 times less than the maximum flow-rate.

The size of the regulating valve body is proportional to the displacement of the shutter.

There are two body types:Longitudinal bodies: Translational displacement of the shutter. Usually known as "Linear Valves",Angular bodies: Rotational displacement of the shutter. Usually known as "Rotary Valves".

These weak forces improve the stability of the valve, which means that a smaller diameter servomotor can be chosen for a valve of the same capacity.

The piston is balanced, because the downstream pressure acts on both sides of these faces.

Mais conteúdos dessa disciplina

In a regulation loop, the final adjustment component is usually an automatic valve which, by acting on the flow-rate of a fluid (gas or liquid), enables the measured value to be regulated:
Pressure
Flow-rate
Level
Temperature, etc.

The valve is broken down into two separate assemblies:
The body
The actuator

There are two body types:
Longitudinal bodies: Translational displacement of the shutter. Usually known as "Linear Valves",
Angular bodies: Rotational displacement of the shutter. Usually known as "Rotary Valves".