Selection and Maintenance of Inverted Pressure Balance Lubricated Plug Valves

Inverted pressure balance lubricated plug valves are suitable for pipelines in various operating conditions in the petroleum, chemical, pharmaceutical, fertilizer, and power industries, with a nominal pressure of CLASS150-CLASS1500 and an operating temperature of -29-180°C, for cutting off or connecting pipeline media. The valve body and sealing surface of the plug valve are equipped with oil grooves, which allow sealing grease to be injected into the valve seat through oil nozzles at any time to enhance sealing performance. Part material and flange dimensions can be reasonably selected and configured according to actual operating conditions or user requirements to meet various engineering needs.

Application Industries and Attributes of Inverted Pressure Balance Lubricated Plug Valves
Inverted pressure balance lubricated plug valves are suitable for pipelines in various operating conditions in the petroleum, chemical, pharmaceutical, fertilizer, and power industries, with a nominal pressure of CLASS 150–1500 LBS and an operating temperature of -29–180°C, for cutting off or connecting pipeline media.

Product Features of Inverted Pressure Balance Lubricated Plug Valves

1. The American standard plug valve features a rational structure, reliable sealing, excellent performance, and an aesthetically pleasing design.
2. The American standard oil-sealed plug valve adopts an inverted pressure-balanced structure, enabling light switching operations.
3. An oil groove is provided between the valve body and the sealing surface, allowing sealant grease to be injected into the valve seat via an oil port at any time to enhance sealing performance.
4. The material of components and flange dimensions can be reasonably selected according to actual operating conditions or user requirements to meet various engineering needs.

Selection Criteria for Inverted Pressure Balance Lubricated Plug Valves

1. Design and manufacturing standards: API 599, API 6D
2. Structural length standards: ASME B16.10
3. Flange connection standards: ASME B16.5
4. Pressure and temperature ratings: ASME B16.34
5. Testing and inspection standards: API 598

Maintenance of Inverted Pressure Balance Lubricated Plug Valves

1. Inspect the sealing surfaces of the valve plug and seat for wear or corrosion. If damage is detected, replace the seals promptly.
2. Check the lubrication status of the valve stem and bearings, and add an appropriate amount of grease regularly to prevent dry friction from causing component damage.
3. Clean the internal debris of the valve at least once a week, focusing on removing impurities from the gap between the valve plug and seat.
4. Avoid sudden opening or closing during operation; it is recommended to operate with one hand without tools to prevent valve stem bending.
5. In high-temperature or corrosive medium environments, use seals made of high-temperature/corrosion-resistant materials and shorten the maintenance cycle.
6. Before use in winter, drain accumulated liquid to prevent freezing.

As a global professional plug valve manufacturer, ZZJG's plug valves have been well received and recognized by customers. The company helps customers in different working conditions select the appropriate plug valve model and provides excellent maintenance services for users' subsequent use of the valves.