公开(公告)号：US20150041700A1

公开(公告)日：2015-02-12

申请号：US14452990

申请日：2014-08-06

Applicant: Fluid Handling LLC.

Inventor： Nimesh Pratapbhai KARIA ,  Girish Subhash MUKKAWAR ,  Navalkishor Birdhilal AGRAWAL ,  Brijeshkumar Kantilal MEGHPARA

IPC: F16K25/00

CPC classification number: F16K25/005 ,  E03B7/00 ,  G01F23/56 ,  H01H35/40 ,  H01H2239/036

Abstract: 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.

Abstract translation: 低断水开关组件具有两部分的底部组件，其具有下基部和上基部。 下部基部由金属材料制成，其构造成适于具有流体流动的管道，并且还配置有中心孔口，以接收响应于管道中的流体流动在轴线上枢转的桨叶臂。 上部基部由非金属材料制成，配置有相应的中心孔以接纳桨臂，并且构造成具有通道以接收枢转臂以安装并允许桨臂在轴线上枢转，以便 响应于流体流动致动ON / OFF开关。 上基部的非金属材料具有比下基部的金属材料低得多的传热系数，从而大大减少了在低截水开关中的凝结积聚，特别是当 低阻水开关用于暴露于低于冰点的温度的应用中，包括冷却器应用。