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TYPE OF VALVE (VALVE) MARINE

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karakter valve berdasarkan jenis valve

TYPE OF VALVE (VALVE) MARINE

TYPE OF VALVE (VALVE) MARINE

valve or also called a valve is a device to regulate the flow of a fluid by closing, opening or inhibiting part of the flow of the flow. An easy example is a water tap . It is an obligation for a pipe engineer to know at least the basics of this valve. Above the valve vessel plays an important role in pipe installations , both vessel fuel pipe installation , ballast , bilge , sanitary , and others.
the types of valves that are often used are gate valve , globe valve , butterfly valve , ball valve, plug valve , and check valve or non-return valve .
1. Gate valve (valve)
This type of valve has a form of disk divider, or often called a wedge, which is moved up and down to open and close. Usually used for a perfect open or close position and is not recommended for partially open positions.
  • valve (Valve) is called a gate valve because it contains an element of closure called the gate that stops flowing. The gate door acts like a shutter that separates the inside of the house from the outside or the door that separates the two rooms.
  • A vertical disk located on the valve body slides the upper and lower gates at right angles towards the flow in the pipe , closes or opens the valve. The current is blocked by using the valve / valve disc wedge-lock effect.

gate valve image when closed

picture of the gate valve when open
 picture of the gate valve when open
 picture of the gate valve component
 picture of the gate valve
2. Globe Valve
type valve globe valve / valve is usually used to regulate the amount of fluid flow. 
  • The globe valve is named after its shape. the globe valve shape has an interior partition, and inline valves and outlet centers. This configuration forces changes in flow direction in the form of S. 
  • The disc blocks the flow of liquid by pressing against the seat on the partition. Concept: force againts.
  • by changing the position of the globe disc valve, globe valves can be used for both throttling and for full-on, full-off flow control.

image of valve globe components

Picture of valve globe components (please click the picture to see the large size)
3. Butterfly Valve
The shape of the insulation is a disk that has a rotating axis in the middle. This type of valveAccording to the design, can be divided into concentric and eccentric. Eccentric has a more difficult design but has a better function than concentric. The simple shape makes it lighter than other valves . 
picture of the Butterfly Valve component
picture of the Butterfly Valve component
6. Check Valve or Non-Return Valve This 
type of valve has a function to drain the fluid only in one direction and prevent the flow in the opposite direction. It has several other types based on its interior like double-plate, swing, tilting, and axial.
picture of the check valve component
picture of the check valve component
4. Ball Valve
The shape of the sphere is a spherical shape that has a hole breaking through the center. 
picture of ball Valve components
picture of ball Valve components

5. Plug Valve
Like a ball valve, but the inside is not spherical, but a cylinder. Because there is no empty space inside the valve body, it is suitable for fluids that are heavy or contain solid elements such as mud.

how to determine the type of valve (valve) that will be used
  1. how to determine the type of valve (valve) that will be used  based on valve function. type of valve that will only be used for perfect open or close position, gate, butterfly, ball or plug can be used. If the valve will be used to adjust the amount of current (used in conditions between open and close), the globe valve is the most suitable. Different if the function needed is to prevent the return flow, then the check valve is the only choice.
  2. how to determine the type of valve (valve) that will be used based on valve size. Ball, plug or globe valve is suitable for small sizes, but for large sizes the valve will be very heavy, ineffective and not economical. Replacing it as a butterfly valve is a common route for large valves. But it should also be noted that butterfly valves are not commonly used for high pressure fluids.

Then how do you choose the type of valve (valve) between the gate valve and ball valve which both have the same function? The structure of the ball valve allows the use of soft / resilient seats for the insulating part. With the soft seat, a ball valve can be made with a guarantee of zero leakage that cannot be applied to the gate valve. In addition, the ball valve also has a quarter turn system that allows closing and opening valves quickly. But with the weakness of soft seats that are susceptible to high temperatures, the gate valve has the advantage of being lighter and more economical even though it does not guarantee zero leakage.
This is where the ability of a pipe engineer is needed who can consider various things in making a decision on which valve to use. In the face of such a thing, usually an engineer will consider lessons from the previous design, both from his own experience or from existing data. The following table is a sample handle for selecting the appropriate valve.

well this is the valve character based on the valve type
valve character based on valve type / type (please click table to enlarge)
 valve character based on valve type / type
 valve character based on valve type / type (please click table to enlarge)
well, that’s my post about the type of valve , how to determine the valve to be used , the valve characteristics table above has similarities and differences , then you can determine the types of valves (valves)

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