Difference between Forged and Cast Steel Ball Valves
Forged steel ball valves are the valves by the cast. Generally, the pressure grade of cast steel valves is relatively low (such as PN16, PN25, and PN40. However, there are high-pressure ones, which can reach 1500LB and 2500LB). Most calibers are DN50 or above. Forged valves are forged out. It is generally used in the high-grade pipeline. The caliber is relatively small, generally in DN50 below. The opening and closing parts (ball) of cast steel ball valves are driven by the stem and rotate about the axis of the stem of the valve. The valve is mainly used to cut off or connect the medium in the pipeline. It can also be used for fluid regulation and control. It is especially suitable for containing fiber, small solid particles and other media. Ball valves are generally divided into handle ball valves, pneumatic ball valves, electric ball valves, cast iron ball valves, stainless steel ball valves, all copper ball valves, etc. Ball valves are opened or blocked by rotating the valve. The ball valve has a switch light and small size. It can be made into valves with a large caliber, reliable sealing, simple structure, convenient maintenance, and sealing surface. The sphere is often closed. It is not easy to be washed away by the medium. The ball valve has been widely used in various industries.
Standards of the cast steel ball valve
Product standards: Universal Valve Flange and Butt Welding Steel Ball Valves GB/T12237-89, Iron and Copper Ball Valves GB/T15185-1994, Steel Valve General Requirements GB/T12224-2005, Standard for Safety Evaluation of Drinking Water Distribution Equipment and Protective Materials GB/T17219-1998, Engineering standard: Building Water Supply and Drainage and Heating Engineering Construction Quality Acceptance Code GB50242-2002, Ventilation and Air Conditioning Engineering Construction Quality Acceptance Code GB50243-2002
Roles of the cast steel ball valve
1. The fluid resistance is low, and its resistance coefficient is equal to that of the same length of pipes.
2. Simple structure, small volume, and light weight
3. Tight and reliable. The sealing surface material of ball valves is widely used in plastic. The sealing is good. It has also been widely used in vacuum systems.
4. It is easy to operate. It can be opened and closed quickly. It is from fully opened to fully closed as long as the rotation of 90 degrees. It is easy to remote control.
5. Convenient maintenance. The structure of ball valves is simple, and the sealing ring is generally active. Disassembly and replacement are more convenient.
6. When it is fully opened or fully closed, the sealing surface of the ball and seat is isolated from the medium. When the medium passes through, it will not cause erosion of the sealing surface of the valve.
7. The application range is wide. It can be applied from a small diameter to a few millimeters, large to a few meters and from high vacuum to high pressure. The ball valve has been widely used in petroleum, chemical, power generation, paper making, atomic energy, aviation, rockets and other departments, as well as people's daily life.
Standards of the cast steel ball valve
Product standards: Universal Valve Flange and Butt Welding Steel Ball Valves GB/T12237-89, Iron and Copper Ball Valves GB/T15185-1994, Steel Valve General Requirements GB/T12224-2005, Standard for Safety Evaluation of Drinking Water Distribution Equipment and Protective Materials GB/T17219-1998, Engineering standard: Building Water Supply and Drainage and Heating Engineering Construction Quality Acceptance Code GB50242-2002, Ventilation and Air Conditioning Engineering Construction Quality Acceptance Code GB50243-2002
Roles of the cast steel ball valve
1. The fluid resistance is low, and its resistance coefficient is equal to that of the same length of pipes.
2. Simple structure, small volume, and light weight
3. Tight and reliable. The sealing surface material of ball valves is widely used in plastic. The sealing is good. It has also been widely used in vacuum systems.
4. It is easy to operate. It can be opened and closed quickly. It is from fully opened to fully closed as long as the rotation of 90 degrees. It is easy to remote control.
5. Convenient maintenance. The structure of ball valves is simple, and the sealing ring is generally active. Disassembly and replacement are more convenient.
6. When it is fully opened or fully closed, the sealing surface of the ball and seat is isolated from the medium. When the medium passes through, it will not cause erosion of the sealing surface of the valve.
7. The application range is wide. It can be applied from a small diameter to a few millimeters, large to a few meters and from high vacuum to high pressure. The ball valve has been widely used in petroleum, chemical, power generation, paper making, atomic energy, aviation, rockets and other departments, as well as people's daily life.
