Pipeline fittings are used in construction, manufacturing, sanitary engineering, pipelines, etc. Depending on what function they will perform, the fittings are divided into several types:
– Stop valve are designed to stop the stream of liquid, and its’ structural types are used only in the OPEN or CLOSED position. They are gate valves, ball valves, globe valves and other plugging devices.
– Control valves are designed for regulating the flow rate of the liquid depending on the demands that are required. Various valves, pressure regulators, liquid level regulators, etc. are used for the regulation.
– Stop and control valves include separate constructional types of the two previous types (gate valves, plug and control valves) and allow not only to close or open the flow of the liquid, but also to regulate its’ speed and pressure in the pipeline.
– Distributive mixing fittings are designed for separating or mixing the liquid flow in the pipeline. There are three-way and multi-way distributive mixing fittings, which include distributing valves и faucets of different types.
 – Protecting and safety fittings are used for the protection of pipelines and hydraulic equipment from unforeseen circumstances, which include the critical pressure variations in the pipeline, temperature variations and solid particles in the liquid. Constructive types of these fittings include safety and pass valves, check and disconnecting valves, filters, etc. As for constructive types of fittings, they include butterfly valves, ball valves, globe valves, etc.