| 摘要 |
A low water cut-off switch assembly features a two-part base assembly having a lower base part and an upper base part. The lower base part is made from a metallic material, configured to be adapted on piping having a fluid flow, and also configured with a central orifice to receive a paddle arm that pivots on an axis in response to the fluid flow in the piping. The upper base part is made from a non-metallic material, configured with a corresponding central orifice to receive the paddle arm, and configured with a channel to receive a pivot arm to mount and allow the paddle arm to pivot on the axis in order to actuate an ON/OFF switch in response to the fluid flow. The non-metallic material of the upper base part has a substantially lower coefficient of heat transfer than the metallic material of the lower base part, so as to substantially reduce condensation build-up in the low water cut-off switch, e.g., especially when the low water cut-off switch is used in applications exposed to temperatures below freezing, including chiller applications. |
