What are shut-off valves? 
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Shut-off valves are equipment designed to regulate the flow of a working medium in a pipeline. Individual devices allow it to be launched, redirected or disabled. Such elements are an important part of the engineering system in residential, industrial and administrative buildings.
Main types of shut-off valves
Shut-off valves https://xn--80aajzhsz.xn--31-6kc4b9a.xn--p1ai/ differ in type of design. There are different options for the principle of operation and structure. Also, when purchasing, the features, individual elements and appearance of the overlapping elements are taken into account.
Manufacturers produce the main modifications of locking elements:
- Wedge-shaped . This is a specific locking element, distinguished by a wedge shape. By design, a rectangular flat panel has a thickness that decreases towards the bottom of the product. The operation of the device involves blocking the flow. In this case, the element is completely lowered, coming into contact with the saddle (a frame consisting of a seal and guides). The advantage is achieving complete tightness.
- Ball . The locking device is made in the form of a ball with a special hole in the center. The diameter of the locking element practically corresponds to the size of the pipe opening. If you turn the device 90 degrees, the tap will be open and the hole will coincide with the center of the flow. At the second turn by the same number of degrees, the current is completely blocked.
- Knife . This is a fitting that has a lower part in the form of a knife. The blade element cuts fibers and dirt, making it one of the most effective. The tightest fit is ensured, guaranteeing complete tightness. The device is especially effective when organizing a sewerage system.
- Rotary disc . A special disk acts as the main covering element. The design is primarily used for round piping systems. Convenience lies in the complete coincidence of the diameter with the flow section of the pipe. The structure is mounted on an axis that is perpendicular to the main flow of the working medium. Simplicity lies in turning using a comfortable handle. If the element remains open, full access for liquid is ensured, with no obstacles to its passage.
Shut-off valves are distinguished by a variety of device options, which differ in structure, design features and operating principle. Today you can choose ball, knife, rotary disk or knife fittings. Each version is distinguished by a reliable and durable design.