RAYS has completed a significant delivery by supplying CNOOC with a batch of customized high-performance pneumatic plug valves. These valves are specifically designed for the renovation of the tank area in the CNOOC Daishan Petrochemical Distillate Oil Phase V Project, which includes product upgrades and expansion engineering. This delivery highlights RAYS’s extensive expertise and proficiency in valve design and manufacturing.
The pneumatic switch plug valves have been customized to meet the specific requirements of the CNOOC project. They incorporate a pressure-balanced inverted cone design that guarantees efficient shut-off performance even in demanding conditions. Operating these valves is simple and dependable, as they only require a 90-degree rotation of the valve stem to open or close.
The valve design incorporates a grease injection mechanism that uniformly applies a dense oil film across the sealing surface through a specialized oil groove on the plug surface under pressure. This feature ensures bidirectional sealing, minimizes friction over time, and provides efficient lubrication, adhering to the ISO 15848-1 Class B low leakage standard for enhanced safety and environmental protection.
The larger end of the plug is equipped with a small orifice that allows the pipeline medium to lift the plug against the inverted cone surface, aiding in sealing and reducing operational torque. Additionally, a check valve located at the smaller end of the plug enables the pipeline medium to increase grease pressure in the upper chamber when necessary, balancing pressures and extending the valve’s operational lifespan.
The plug surface undergoes rigorous nitriding and nickel-phosphorus alloy plating treatments, significantly enhancing hardness and wear resistance, even in high-pressure, high-frequency environments. The valve stem, made from 17-4PH martensitic precipitation-hardened stainless steel, is robust and durable, making it suitable for high-load conditions. Its blowout-proof design and triple-seal structure further enhance the valve’s durability and sealing performance.
