It should be said right away that most types of valves, including DN 100, are used in pipelines. These can be systems with the most diverse working environment, however this element will always occupy a significant place in its operation.
General description of devices
The main goal of any valve is to limit the flow of the working substance. It can be limited both fully and partially. The most simple in its application and device was the cast iron gate valve DU 100.
A distinctive feature of this device is that it is not too functional. In other words, the shut-off valve of this unit can only be installed in two positions: open and closed. This suggests that the device can only be installed in the system where it is necessary to either let the working substance through the pipe or block its access. Letting a weak stream fail. There are several of the following common advantages for valves DN 100:
- suitable for work in a wide variety of environments;
- the length of the device is small;
- due to the low hydraulic resistance, such devices began to be used in pipeline systems;
- simplicity of design.
General characteristic of a gate valve DN 100 made of cast iron
There are many different models for this type of device. One of them is a cast-iron wedge gate valve with a non-rising spindle. This unit is most widely used as a shut-off valve for a piping system transporting water. There is a certain rule for installing the device. His position can be almost any. Only installation is prohibited if the valve is facing down. In any other position of the valve mounting is allowed. To control the gate valve DN 100 of this type (30ch915br Ru 10), an electric actuator is used.
We can add that today all the companies that are engaged in laying the pipeline and installing this device use only this model when it comes to transporting hot and cold water. There are no analogues to this device.
Ball valve DN 100
Immediately it should be said that there are several different types of ball valves. They differ in their purpose, as well as those functions that can perform.
If we talk about installation methods, we can distinguish crane, flange or threaded. Each of these devices is designed to operate in a different environment, and also has its own design, due to the characteristics of the installation. Gate valves having a welded joint have an elongated body on both sides. This is done so that during welding, vulnerabilities do not burn out from high temperature. Flanged ball valve DN 100 is considered the simplest model both in its service and design. If we talk about the threaded connection method, the difference from the welded one is that these cranes can be serviced, and after their service life has been replaced.
Pros and cons of ball models
Ball valve DN 100 has a number of positive and negative characteristics. The following should be considered positive:
- smaller dimensions when compared with wedge-shaped, for example, devices;
- depending on the technical requirements of the pipeline, you can change the installation method;
- all internal elements of the device are made of stainless steel, which significantly increases the life of the entire valve.
However, there are a number of some disadvantages, which include the following:
- The presence of non-metallic parts and seals leads to the fact that dirt, sand, etc., accumulate on such elements, which, in turn, leads to a loose flow block. Since these components cannot be replaced separately, you will have to change the entire device.
- If you use the device too rarely, that is, it will always be in the open position, then when you try to turn, a βstickingβ of a metal ball may occur, which will lead to a breakdown of the lever.
Gate valve with electric actuator DN 100
These models were mainly used in those pipelines with diameters from 1.5 to 200 cm. Also, pressure - up to 25 MPa and temperature indicator - up to +565 Λ became important characteristics. The main reason for choosing an electrically operated gate valve is the automation of the flow control process. There are currently three types of drive:
- manual method in which a flywheel or gearbox is used;
- a mechanical method in which a device such as a multi-turn electric drive is used;
- the latter is a piston method, when selected which uses a hydraulic actuator or a pneumatic actuator as the drive.
Most often, a device such as an induction motor is taken as an electric drive. Such devices have three modes of operation: adjustment, remote or automatic. To fully ensure the correct operation of the unit, it is necessary to have an electric communication cabinet.
Types and characteristics of the model
Gate valve DN 100 of this model can be made in two forms. It can have a retractable or non-retractable spindle. The type with the retractable design was more widely used. When assembling such an assembly, the spindle thread is carried outside the valve body. The lower edge of this part is fixed with the valve. During the rotation of the travel nut, translational movement is carried out, thanks to which both parts will be fully extended - the full amount of the shutter stroke.
The advantages of this type include the fact that the running unit is brought out from the pipeline, which means that it is not exposed to negative pressure from the working medium. In addition, repairs and maintenance are much easier.
Naturally, the second type, with a non-extendable spindle, is the exact opposite of the previous model. It is used quite rarely, since it cannot be repaired - you have to change the entire assembly completely. He is also under constant pressure. The only positive quality is that it can be used in a limited space, since the spindle does not stick out.
Wedge type device
The DU 100 wedge gate valve is also divided into several different models. However, they are united by the fact that they have a common design - a parallel two-disk with a retractable spindle, as well as a manual control.
The main purpose of the device is to install in a pipeline through which water and steam are transported at a temperature not exceeding +225 Β° C. It is also used in oil or oil transportation systems if the temperature does not exceed +90 Λ or for the supply of benzene hydrocarbons at a temperature indicator of not higher than +200 Λ.
Brief description of the unit
The operating position of the gate valve DN 100 of this type is any, that is, the valve can be turned in any direction. The direction of movement of the medium inside the pipeline system can also be any. You can install the shutter of this device in only two positions: either completely open or completely closed. The use of a valve of this model as a stop valve is not permitted. The manufacturer usually gives a guarantee for the operation of this device up to 18 months from the date of putting the device into operation. However, this is only guaranteed if the operation and repairs on the part of the consumer are carried out according to the plan, in accordance with the technical requirements.