Flanged steel needle valve is one of the most widely used types of needle valve that can work in low, medium and high working pressure. The title "Flanged" actually refers to the connection type of this valve that uses a flange. This type of valve is created by connecting and machining two different parts.
- Flange
- welded needle valve
This type of valve comes from the connection and machining of two different parts. The flange and the needle valve are welded together to form the flanged steel needle valve. This type of valve in installations and piping is responsible for controlling, cutting and connecting the flow. This type of valve is mostly used in laboratory activities, especially in the oil and gas industry, due to its design and dimensions. One of the most important features of this valve compared to other types of valves is that the disc or needle In this type, it has the ability to close or open the pipe flow at high speed.
Flange
Flange is one of the types of connectors related to pipes and valves, which is a disc-shaped piece that is usually connected to each other in pairs using bolts and nuts, and for this reason, it can be easily opened and closed. is. There are different types of flanges, such as: plain surface, raised surface, welded throat, blind, facing, flanged, chamber welding, threaded and orifice, each of these flanges is used for a specific application. . For example, the throat flange is suitable for high pressure and sub-zero temperatures. The flanged steel needle valve usually has the ability to withstand the working pressure of 10, 16 and 40 bar, and according to the same principle, it is divided into several working classes. This product is made of A105 steel and the leakage rate of this valve is lower than other similar valves. The flanged steel needle valve performs well in both liquids and gases.
how to function steel needle valve
The structure and function of this type of valve is different from wing valve or gate valve. In this type of flow, it is driven into a cavity with small dimensions and then passes between a needle-shaped conical rod and the desired cavity. In this state, which is the open state of the valve, the needle bar does not disturb the flow. But in the closed state, the flanged steel needle valve is able to stop the flow and cut it off by the conical rod or the needle in the cavity.
Specifications of steel needle valves, the type of design they have, have very high precision, so they can be used in sensitive industries with high precision.
- These lions have relatively small sizes.
- These valves are mostly used in places that require restrictions and accurate calculations.
- Due to its design features, this type of valve can work in all types of working pressure from low to high.
- The classification and leveling of this type of valve is done exactly based on its tolerance in working pressure.
- The flanged steel needle valve has a lower leakage rate than all other types of valves, that is why it has higher accuracy and is used in both liquids and gases. The size of these valves is determined by the manufacturers and usually this size is the size of the valve mouth.
- One of the important advantages of the flanged steel needle valve is having a flange in its structure.
- Flange due to its easy opening and closing; when you need to open and close the valve several times, it helps you to do this easily.
- The laboratory is one of the places where the flange may be opened and closed several times.
- The variety of foreign and domestic producers has made it possible to buy this type of milk at a reasonable price.
Types of steel needle valves
Usually in three ways They are designed so that they can be used according to the place of installation in the lines.
- Z-Body
- Y-Body
- Angle-Body
Design (Z-Body)
This type of valve can be used for cases where the fluid is water. The most common type of body design in needle valves is the Z design. In these lions, the separating plate throughout the body, which includes the seat, is Z-shaped.
Design (Y-Body)
The design of the Y form is the best type of body to eliminate the inherent pressure drop in the needle valves, and the angle between the seat and the line axis is 45 degrees. This form of needle valves is the most suitable type for high pressures.
Design (Angle-Body)
This design is a modified model of the original design of the needle valve. This faucet has a 90 degree end. In this valve, the liquid will be able to rotate only at an angle of 90 degrees, and its exit is more symmetrical than the exit of a normal needle valve. The main and special advantage of this valve is that in addition to being a valve, it can also act as a knee valve. For balanced conditions of pressure and temperature, this type of steel needle valve works like a normal needle valve. The output position of this valve is suitable for dynamic and corrosive fluids. In systems where the temperature is low, this type of steel needle valve design is used. In this case, pressure is applied to the bottom of the disk, which improves the application of these valves and protects the seals. And this also reduces the amount of wear on the seats and porous surfaces.
steel-needle-valve buying guide
According to the fact that there are many types of flanged steel needle valves in the market, several criteria should be examined before purchasing this type of product, by identifying these criteria, the possibility of choosing a needle valve becomes much easier. And we can be sure that the selected product will have the best efficiency and performance for our field of work. These criteria are
- plumbing plan
- Usage type
- Volume
- temperature
- Pressure
- Building materials
- Simulating system to start the milk
The point to consider when buying this product is:
- These valves are highly accurate and controllable in cases where there is sensitivity; Like laboratories, petrochemicals and power plants, they can be used more optimally.
- Its flanged type makes it highly flexible in different working environments, including environments that require frequent changes in valves or opening and closing them, because one of the advantages of connecting flanges is simplicity in operation. It is open and closed.
- The variety of foreign and domestic producers has made it possible to buy this type of milk at a reasonable price.