AWWA C517 Eccentric Plug Valve

Mature Design: With installations across the globe, cam plug valves have proven to be the preferred choice for sewage, industrial wastewater, and treatment applications. Cam plug valves are proportionally eccentric plug valves that allow for cost - effective, low - torque - driven pump control, shut - off, and throttling. The eccentric action on the valve body enables the rotating plug to be seated and unseated with minimal contact, thus preventing high torque and avoiding wear on the valve seat and plug. Combining the eccentric action, stainless - steel bearings, seals, and a heavy - duty nickel seat ensures long - term use with minimal maintenance.

Preferred Features: The cam plug valve is equipped with a shaft sealing system that utilizes V - packing sand - proof seals. This design facilitates maintenance and reduces the number of seals, preventing sand particles and the medium from reaching the bearings and packing, thereby preventing the plug from locking and reducing wear. These seals are standard for both the upper and lower journals. To prevent over - tightening of the packing, the shaft seal uses POPTM (Packing Overload Protection) gaskets. The packing can be easily adjusted by simply using the pull - tab function to remove the POPTM gaskets as needed (Figure 1). Adjusting or replacing the V - packing does not require removing the gear, motor, or cylinder actuator. The bearing set consists of permanently lubricated T316 stainless - steel radial bearings for both the upper and lower journals. The upper thrust bearing is made of Teflon, and the lower thrust bearing is T316 stainless steel. These bearings are protected by sand - proof seals from abrasive wear.

Advanced Technology: The use of the latest valve technology guarantees high - quality valves and long - term service. During the design process, solid modeling and finite element analysis (FEA) of key structural components are employed. Flow and torque data are obtained from flow tests, mathematical models, and computational fluid dynamics (CFD). Manufacturing technology involves automated casting process control and an ISO9001 - certified controlled production process. Each valve is tested in accordance with AWWA C517 and MSS SP - 108 standards, and the tests are conducted on an automatic hydraulic test bench with measuring instruments calibrated to ISO standards.