While the 3155 series typically requires a single gasket

vibration-resistant connection to the system control board

Key Benefits Direct OEM Compatibility: Engineered as the official successor to 626469 and 626469R to ensure exact fit and function

Can I use this spring in any Sensus regulator

Parker 202420 Gasket Kit While the 3155 series typicallyThe Parker 202420 Gasket Kit is a critical OEM maintenance component designed for the Parker Flo Con A9 series of pilot operated pressure regulators. Engineered for industrial refrigeration and high demand HVAC systems, this kit provides a complete set of high grade gaskets and O rings required to reseal the valve body and maintain pilot circuit integrity. This kit is specifically compatible with the A9, A9B, A9E, A9S, and A9SE valve configurations,