Mechanism

Shut-off valve designed to disable the flow of the medium, adjusting to changing environmental parameters regulating its consumption, distribution – for the distribution of flow in a given direction, mixing – The mixing of media, safety – to protect plants and pipelines from unacceptably high pressure protection – to prevent accidental conditions (bursting) or the formation of reverse flow (Check valve). Depending on the direction of flow after passing through the valve is divided into the last checkpoint and angular. At the entrance fixture, as opposed to the corner, the medium does not change the direction of its motion for output compared with the direction of the input. Straight through valves are usually installed on straight sections of pipe, angle – in places it povorota.V depending on the construction of connecting nozzles armature is divided into flange, a coupling, tsapkovuyu, choke and weld. Flanged valves have flanged connecting pipes, Boot shaped – Coupling connecting pipes with an internal thread. Fittings for sewerage systems can have a socket connections without threads, cavities are filled by connecting the appropriate material (cement, lead).

Tsapkovaya fixture has mounting tsapkovye connections with the outside threaded, choke – choke tubes connecting with an external thread. Weld fittings connecting pipes is provided for welding to the pipeline. To far as the shut-off valves and control valves are used, and valves. In 80% of these were made of cast iron gate valve of low quality. Virtually all experts, professionals working in the field installation and operation of heating and water systems are known problems with conventional valves: the need for annual revision for padding and stuffing cleaning rings sealing discs; complexity of the emergency floor pipeline in an emergency situation, lack of integrity, a high percentage of failure due to a fall or broken bolts cheeks. In addition, the valves have large dimensions and weight.