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What are the differences between forged steel ball valve and cast steel ball valve

Label: ball valve, cast steel, different, different, same, which added time: May 25, 2021 click 1314 second

Forged steel ball valve is cast Stainless steel valve As usual, the pressure grade of stainless steel valves usually cast is relatively low (such as PN16, PN25, PN40, but there are also high-pressure valves, which can reach 1500Lb and 2500lb), and most of the diameters are above DN50. Forged stainless steel valves are forged. They are usually used on high-grade pipelines with small caliber, and they are usually below DN50. The opening and closing parts (ball) of cast steel ball valve are driven by the valve stem and rotate around the axis of the valve stem. It is important to cut off or connect the medium in the pipeline, and also can be used for fluid regulation and control. Among them, the hard sealing V-type ball valve has strong shear force between its V-shaped ball core and the metal valve seat of hardfacing cemented carbide, which is especially suitable for medium containing fiber and fine solid particles.

The ball valve is usually divided into handle ball valve, pneumatic ball valve, electric ball valve and cast iron ball valve, Stainless steel ball valve , all copper ball valve, etc. Ball valve is to rotate the valve to make the stainless steel valve smooth or blocked. Ball valve switch light, small volume, can be made into a large diameter, reliable sealing, simple structure, convenient maintenance, sealing surface and spherical surface are often closed, not easy to be eroded by the medium Jiuzhaigou tourist car rental It has been widely used in various industries.

Standard for cast steel ball valve:

1. Product standards

GB / t12237-89, "stainless steel valves for general use - Flanged and butt welded steel ball valves"

"Iron and copper ball valves" GB / T 15185-1994

Common requirements for steel stainless steel valves (GB / T 12224-2005)

Standard for safety evaluation of drinking water transmission and distribution equipment and protective materials (GB / T 17219-1998)

2. Engineering standards

Code for acceptance of construction quality of building water supply, drainage and heating engineering (GB 50242-2002)

Code for acceptance of construction quality of ventilation and air conditioning engineering (GB 50243-2002)

Function of cast steel ball valve:

1. The fluid resistance is small, and its resistance coefficient is commensurate with the pipe section of the same length.

2. Simple structure, small volume and light weight.

3. It is compact and reliable. The sealing surface material of ball valve is widely used in plastic and has good sealing performance. It has also been widely used in vacuum system.

4. Easy to operate, quick to open and close, rotate 90 from full open to full close °, It is convenient for remote control.

5. The maintenance is convenient, the ball valve structure is simple, the sealing ring is always moving, so it is convenient to disassemble and replace.

6. When the valve is fully open or closed, the sealing surface of the ball and valve seat is isolated from the medium, and the medium will not cause erosion of the sealing surface of the stainless steel valve.

7. Wide range of application, diameter from small to several millimeters, large to several meters, from high vacuum to high pressure.

Ball valve has been widely used in petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rocket and other departments, as well as in people's daily life.


Difference between cast steel ball valve and forged steel ball valve Wuhan website production There are four important differences between them    1: forging process of steel.    2. Different processing methods.    3: the pressure is different    4: different prices.    1. Technological difference: cast steel is the steel used for casting. Cast steel is divided into cast carbon steel, cast low alloy steel and cast special steel. Cast steel is a kind of steel casting produced by casting method. Cast steel is important for manufacturing parts with complex shape, difficult to be forged or machined, but with high strength and plasticity. Then our factory processes according to this casting's grinding tool, finally completes the customer's necessary forged steel ball valve products.    2. Introduction and difference of processing style: Forged Steel refers to all kinds of forging materials and forgings produced by forging method. The quality of forged steel parts is much higher than that of steel castings. It can withstand large impact force, and its plasticity, toughness and other mechanical properties are also higher than that of steel castings. Therefore, forging steel parts should be used for all machine parts that are in tension. For example, some large-scale projects, chemical industry, petroleum are necessary, forged steel ball valve series are more.    In our common practice, casting is liquid forming, while forging is a process of plastic deformation Marketing planning company Forging parts can improve the internal structure of the organization, with good mechanical properties, uniform grains and tension. The workpieces must be forged. Casting will cause structural segregation and defects. Of course, casting has its advantages. It is not easy to open the mold for complex forming parts, so casting has been adopted.    3: different pressure: the maximum pressure of ball valve made of forged steel can reach 420 kg, while that of cast steel is usually 100 kg.    4: different prices: forged steel ball valve is much more difficult and required than cast steel ball valve in terms of process and processing style. Of course, the price of forged steel ball valve is much higher than that of cast steel ball valve.


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