Преимущества и работа фиксированных шаровых кранов стандарта ASME
Advantages of stationary ball valves:
1. Аварийное уплотнение с помощью впрыска смазки: In the event of unexpected seat seal failure due to foreign objects in the medium or fire, the grease injection valve provides a quick connection to the grease injection gun. The imported pump allows for convenient and rapid injection of grease into the seat seal, уменьшение утечки.
2. Reliable stem sealing and low operating torque: В дополнение к стандартному уплотнительному кольцу, the stationary ball valve also features an O-ring on the packing gland, ensuring reliable stem sealing with double sealing. Добавленная графитовая набивка и впрыск смазки минимизируют утечку через шток после пожара.. Подшипник скольжения штока и упорный подшипник облегчают работу клапана..
3. Full bore or reduced bore: Stationary ball valves can be selected with either a full bore or reduced bore structure as needed. For full bore pipeline ball valves, the flow orifice diameter matches the pipeline inner diameter, облегчение очистки трубопровода.
4. Extendable stem: The valve stem can be lengthened according to installation or operational requirements. Extended stem fixed ball valves are particularly suitable for applications requiring underground pipeline installation, например, городские газопроводы. The extended stem size is determined according to customer requirements.
5. Гибкая работа: Использование седел клапанов и подшипников штока с низким коэффициентом трения и превосходной самосмазкой., рабочий момент клапана значительно снижается. Поэтому, даже без нанесения уплотнительной смазки, the valve can be operated flexibly and smoothly for extended periods.
Operation and Use of Fixed Ball Valves
1. Before operation, ensure that the pipeline and fixed ball valve have been flushed.
2. Valve operation is completed by rotating the valve stem according to the input signal of the actuator: а 1/4 turn (90°) forward rotation closes the valve. A 1/4 turn (90°) reverse rotation opens the valve.
3. When the actuator’s direction indicator arrow is parallel to the pipeline, the valve is open; when the indicator arrow is perpendicular to the pipeline, клапан закрыт.
