Design features of pipeline valves

Structurally, any pipeline valve that is controlled remotely consists of identical components: a shut-off body with a body, a rod and a liner, a drive, an alarm device. If the valve is equipped with a drive with a fixed position on two edges, then an additional package assembly with poppet springs is built into it. Sometimes it is mounted directly into the drive.

Structure of the pipeline valve

If the valve diameter is more than 50 mm and there is a hydraulic drive that fixes the two extreme positions, a spool valve is added to the design. The alarm unit includes several important components, including an alarm, a drive coupling on the shaft with a bolt and a stop, as well as a lever fixed on the bracket with a special finger. The last element is mounted to the housing using bolts and two pins. The earring is connected to a lever and a thrust bolt. Additionally, the device is equipped with a neutral position spring.

To increase the safety of operation, a special casing is put on the hydraulic drive and the alarm unit, which excludes mechanical damage, dust or moisture ingress, which can lead to the failure of the shut-off valve.

Features of manually operated valves

We have determined that the valves are used to control the flow of the working medium through the pipeline. It includes a locking device in the form of a disk, which translationally moves along the axis of the spindle installed perpendicular to the plane of the seat. The simplest type is considered to be manually operated valves. To close and open them, it is enough to turn the flywheel manually.

During installation, the valve usually has two main positions – fully closed or open. Changing the fixed value is necessary in extreme cases when it is necessary to disconnect a certain area for repair or replacement of equipment.