Is the material of the J41T 16 globe valve cast iron or cast steel?

Cast iron. J41T-16 25 should be:

J Globe valve 4 flange connection.

1. Straight-through T copper alloy sealing surface.

There is no substance before and after the connection)

16 nominal pressure.

The body material is gray cast iron omitted from the model number.

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Summary. Hello dear<>

<> the material of the J41T-16 globe valve is cast iron, and the J41T-16 globe valve usually uses cast iron material. In general, cast iron is usually used for smaller size globe valves, while cast steel is usually used for larger size globe valves because of the better strength and corrosion resistance of cast steel. However, the specific situation also needs to be selected according to the use requirements.

Is the material of the J41T-16 globe valve cast iron or cast steel?

Hello dear<>

<> J41T-16 shut-off valve is made of cast iron, and J41T-16 shut-off valve is usually made of cast iron. Generally speaking, cast iron is usually used for smaller size globe valves, while cast steel is usually used for larger size globe valves, because of the better strength and corrosion resistance of cast steel. However, the specific situation also needs to be selected according to the use requirements.

Is the J41T upper valve with a thread buckle or with a flange?

The connection method of J41T shut-off valve is usually threaded connection. There are many ways to connect the pipe of the globe valve, but there are two main types: thread connection and flange connection.

On the J41T globe valve, according to the common product specifications and connection methods, it is generally connected by threads. The characteristics of the wire blind carry-on connection are easy connection, good sealing, easy installation, and do not require special tools and techniques.

According to the provisions of "JB T 308-2004 Valve Model Preparation Method".

j== globe valve.

4== Flange connection.

1== Straight through the runner.

t== Sealing surface material: copper.

16== Pressure Rating:

DN20: nominal diameter.

J41W-16 is a stainless steel flange globe valve, which is suitable for nitric acid, acetic acid and other occasions in chemical and other industries. The nominal diameter is 125 (mm), the nominal pressure is within the working temperature, and the working temperature is -29 550.

1. The interception check valve, also known as the interception door, is the most widely used valve, and the reason why it is widely popular is that the friction between the sealing surfaces in the opening and closing process is small, relatively durable, the opening height is not large, the manufacturing is easy, the maintenance is convenient, not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the disc and the sealing surface of the valve seat fit tightly to prevent the flow of medium.

2. The valve plays an important role in cutting off and throttling the medium in the pipeline where it is located, and the globe valve is an extremely important cut-off valve, and its sealing is by applying torque to the valve stem, and the valve stem exerts pressure to the valve disc in the axial direction, so that the sealing surface of the valve disc and the sealing surface of the valve seat are closely fitted, and the medium is prevented from leaking along the gap between the sealing surfaces.

The difference between the two is only the difference in the material of the sealing surface, that is: the sealing surface material of J41W-16 is the same material as the valve body, and the sealing surface material of J41H-16 is stainless steel.

The opening and closing parts of the globe valve are plug-shaped discs, and the sealing is flat or sea cone, and the disc moves in a straight line along the center line of the valve seat.

The movement form of the valve stem, (common name: dark rod), there are also lifting and rotating rod types, which can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.

j stands for globe valve.

4 indicates flange connection.

1 indicates the DC channel, and the disc is unbalanced.

W indicates that the seat sealing surface is directly machined from the body material.

h denotes the density surface of the alloy steel.

16 indicates that the nominal pressure is 16 kg.

The same nominal pressure through flange connection of cast iron globe valve, the difference is only the sealing surface material, "W" means that the sealing surface material is the same material as the valve body, "H" means that the sealing surface material is stainless steel.

The difference is only that the sealing surface material is different.

The globe valve, also known as the shut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the valve disc, the resistance that needs to be overcome by the operating force is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium, and the force of closing the valve is greater than the force of opening the valve, so the diameter of the valve stem should be larger, otherwise the failure of the top bend of the valve stem will occur. According to the connection method, it is divided into three types:

Flange connection, thread connection, welded connection. After the appearance of the self-sealing valve, the medium flow direction of the globe valve is changed from the top of the disc to enter the valve cavity, at this time, under the action of medium pressure, the force of closing the valve is small, and the force of opening the valve is large, and the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also tighter.

China's valve "three to give" has stipulated that the flow direction of the globe valve is all top-down. When the globe valve is opened, the opening height of the disc is 25% to 30% of the nominal diameter. The maximum flow rate has been reached, indicating that the valve has reached the fully open position.

Therefore, the fully open position of the globe valve should be determined by the stroke of the disc.