There are five general body styles of ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case. Stainless Steel Ball Valves, Brass Ball Valves, Sanitary Ball Valves, Water Ball Valves ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsirvalve.com
In addition, there are different styles related to the bore of the ball mechanism itself.
Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.
On February 28, 2017, the world's largest torque-capable new plunger steering gear, which was first built by Wuhan Shipbuilding, successfully passed the DNV-GL ship inspection and shipowner inspection.
It is reported that this type of steering gear is the first large-scale plunger steering gear designed and developed by the company. It is equipped with the world's largest load capacity container ship (20,000 TEU). It is also the world's largest torque capacity piston steering gear. The maximum working torque is 9810KNm, using 4 sets of power system. Compared with the previous servos of the same type, this type of steering gear has more hydraulic piping layout loops and major changes in related technical parameters. It has the characteristics of high system integration, high process difficulty and high technical requirements.
In the manufacturing process, the production management department made reasonable arrangements and coordinated in time; the planning assets department completed the construction of large-scale test benches on schedule; the quality department was meticulous and continuously tracked; the technical center cooperated 24 hours a day. Under the cooperation of various departments, the products passed the ship inspection at one time and were unanimously approved by the surveyor and the shipowner.
The successful first-in-one product has accumulated valuable experience for the design and manufacture of the company's multi-powered system, and further expanded the company's range of plunger-type steering gears, laying a solid foundation for the follow-up of high-end ship supporting contracts.