The shut-off valve is used on different types of pipelines, as well as on flow installations, it plays the role of a locking device. When using it, you can perform many operations: cutting off a heater from the network, for example, as well as removing secondary heat transfer if the valve is closed. The shut-off valve may well be used for preliminary balancing of the system. This type of fitting works in two equally important positions - open or closed. Traditionally, it is installed in vertical and horizontal pipelines, where the working medium is directed under the plate. The shut-off valve is connected to the line, usually by flange connection or welding.
This type of shut-off valve is usually recommended to be installed on highways through which the process of transporting hot andcold water intended for technical purposes, air, water vapor. It is not recommended to use them for throttling, as aggressive liquids and gases can have a destructive effect on the valve.
The bellows type shut-off valve has a limited life, this is due to the fact that the bellows is not designed for continuous operation. Such valves require regular inspection and maintenance. Bellows valves have managed to prove themselves excellently in systems engaged in the transport of toxic media, vacuum and aggressive media. It is important to understand that in the event of a bellows failure, a depressurization with a leakage of the working medium is quite likely. If there is a leak of aggressive or toxic media, this may threaten the ecological state of a certain area.
A diaphragm or hose-type shut-off valve also has certain disadvantages. In this case, the occurrence of an unpleasant situation may be due to the failure of the rubber hose or membrane. If an electric drive is used, then during the entire operational period it is required to monitor its condition.
A flanged shut-off valve is connected to a tank or pipeline by means of flanges. Its advantages include the possibility of repeated installation and dismantling on the pipeline, excellent sealing of joints, ease of tightening them, applicability for a wide range of pressures, high strength. As disadvantages, the loss of tightness due toloosening capabilities, large dimensions and significant weight.
The shut-off valve is designed to completely block the flow of the medium. They are typically used where tight shut-off and operational reliability are required.
The valve should be mounted in a convenient location that is reasonably accessible for maintenance. For the convenience of regulating the flow rate of the medium or the heat transfer of the coolant, the valve is equipped with a special handle.
In addition to industrial installations, this type of valves is actively used in water heating, heating and air conditioning systems.
