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KITZ Ball Valves
1) The valve disc is in the shape of a ball, and it is constructed with a soft seat, making it similar in design to a cock.
2) The ball is usually rotated through the use of a lever handle. The ball allows straight-through flow when it remains in the open position and it prevents flow-through when the handle is rotated a quarter turn (90°). Because larger valves require more force to operate, they are equipped with a gear handle in place of a lever handle.
3) Although the mechanical and physical properties of the soft seat material provide a very tight shutoff, there are limitations for applications involving high temperatures. Ball valves are suitable for use with full-on, full-off flow control in general service. Due to their material and construction, ball valves are not appropriate for use in applications that require partial opening of the valve.

The valve is connected to the pipe using pipe threads. This connection type is used primarily for relatively small valves, not exceeding 2 inches with a pressure level of 1 MPa or lower. Unlike other connection methods, the threaded type does not require small parts (bolts and nuts, etc.), making it economical. However, this type of connection is difficult to repair. There are two types of threading: internal and external threads, and tapered and parallel threads. Most valves employ the tapered thread type.


The valve is welded directly to the pipe. This connection is usually used where perfect shutoff of leakage is crucial, for example in high-temperature and high-pressure pipeline systems. There are two types of weld: socket weld and butt-weld.

End connections are in the shape of a flange and the two flanges are connected using bolts and nuts. Flanged connections are the most common method of connecting valves, regardless of the pressure level (from low to high pressure levels) and valve size (from small to large valves).

1) Socket weld
The welded end of the valve is formed in the shape of a socket, into which the pipe is inserted and then welded to the valve. This connection is used primarily for small valves, not exceeding 2 inches.
2) Butt weld
The valve and pipe ends are abutted to each other and then welded to form the connection. The two butt edges are beveled for jointing. This connection method can be used for valves of any size.