GB/JIS/DIN 2PC Cast Steel Wcb Stainless Steel DN65/100/125 2inch 150lb Pn16 SS304 SS316 CF8 Flange/Thread Ball Valve

Product Description

A Ball valve is a type of shut-off valve that is used to control flow where a simple 'on' or 'off' flow is required. They are easy to operate and can "shut off" or "open" flow with a simple 90 degree turn of the handle. The name is derived from the spherical internal ball that has a hole bored-through it, which rotates to open and close the flow. They are versatile able to transfer liquids and gasses in a wide pressure and temperature range. They are reliable, capable of repeating the same function of sealing well after many cycles, even after extended periods of disuse. They are durable and have a long and predictable service life.

 

Corrosion Resistant

The first reason that makes stainless steel valves extra special is that they are resistant to corrosion. In an industrial domain, this feature is extremely important. Stainless steel ball valves quickly passivate, forming a corrosion-resistant layer at its surface. Thus, these valves thrive in a moisture-laden environment.

 

Durable

A stainless steel valve is incredibly durable. It provides super abrasion resistance and also rejects erosion in dangerous settings, such as sand particles in high-speed gas streams. Likewise, a steel valve also effectively dodges shock damage from impacts caused by a water hammer. Thus, owing to its durability, steel valves are ideal for heavy-duty applications like mining.

 

Versatile

The third benefit of a stainless steel valve is versatility. Steel is an alloy, and is usually composed of chromium, molybdenum, and nickel. These three elements can be adjusted to cater to specific project and industrial needs, such as an increase in strength, being corrosion resistant, and more.

 

Tolerance to High Pressure and Temperature

Last but not least, a major benefit of stainless steel ball valves is that they work incredibly well in high-temperature and very high-pressure applications. For instance, ferritic grades are appropriate for operating between 1022 degrees Fahrenheit and 1562 degrees Fahrenheit.

They Utilize a hollow ball that rotates allowing a flow through it when aligned and stops the flow when it is in a closed position. A quick 90 Degree turn of the handle is all that is needed to fully open or close the valve flow.

 When the handle is parallel and in-line with the pipe, then the valve is open. When the handle is perpendicular and at right angles to the pipe, then the valve is closed. It is this 90° turn either clock wise or anti-clockwise to open or shut the flow of the valve ,that led them to also be known as quarter-turn valves.

The valve has an internal rotary ball with a hollow bore running through the center. This Inner ball is connected to the handle via a stem. So by turning the handle the ball rotates and when the hollow bore is aligned with the pipe and the in same direction as the flow, then the flow is open, and when the bore is perpendicular to the flow, then flow is shut off.

Ball Valve Components

Although there are numerous parts making up the valve the basic components are made up of the following:

The Valve Body

Also referred to as the valve housing or shell, it contains all the inner components of the valve. Usually composed of a rigid metal, in this case Stainless Steel, it protects all the internal components and keeps them in the correct position and aligned for proper functioning. It also facilitated access for the external handle to connect with and rotate the internal ball, via the stem. The valve body comes in three assembly options: one-piece, two piece and three-piece designs.

The Rotary Ball

This is the part that gave the valve its name. It is a ball that has "flow path" known as a bore, through the center that allows the medium to flow through it. The ball is rotated by the stem, which either opens the flow when the bore is in-line with the pipe or closes the flow when the bore is perpendicular to the flow. There are two types of bore design: Full port and Reduced port.

The Stem

Also referred to as the shaft, it connects the external handle that rotates the inner ball. The Stem has washers and packing rings to ensure a tight seal and to prevent any leaks. The stem is rotated as the handle is turned, which in turn rotates the ball, opening and closing the flow.

The Seat

The Seat sits between the ball and the valve body and ensures a water tight seal. There are two seats that sit on either side of the ball and are usually composed of PTFE.

The Handle

The handle is also often called the lever. it a standard ball valve it is the manual way used to turn the ball valve to the open or closed position.