초록 ▼

A secondary seal assembly is used with a process instrument including a probe assembly and an electric housing assembly. The probe assembly includes an adaptor receivable in an opening of a process vessel, a probe extending through the adaptor into the process vessel, and a primary seal between the

A secondary seal assembly is used with a process instrument including a probe assembly and an electric housing assembly. The probe assembly includes an adaptor receivable in an opening of a process vessel, a probe extending through the adaptor into the process vessel, and a primary seal between the probe and the adaptor. A probe terminal provides an electrical connection between the probe and the electric housing assembly. The secondary seal comprises an elongate extension housing adapted to be mechanically connected at one end to the adaptor and at another end to the electric housing assembly. A shaft insert is received in the extension housing having a terminal at each of opposite ends, a first terminal for providing an electrical connection to the electric housing assembly and a second terminal for providing an electrical connection to the probe terminal. A seal between the shaft insert and the extension housing provides a secondary seal to the process vessel.

대표청구항 ▼

[ I claim:] [1.] A secondary seal assembly for use with a process instrument and adapted to be disposed between a probe assembly, that is normally mechanically connected to an electric housing assembly, and the housing assembly, the probe assembly including an adaptor receivable in an opening of a p

[ I claim:] [1.] A secondary seal assembly for use with a process instrument and adapted to be disposed between a probe assembly, that is normally mechanically connected to an electric housing assembly, and the housing assembly, the probe assembly including an adaptor receivable in an opening of a process vessel, a probe extending through the adaptor into the process vessel and having a primary seal between the probe and the adaptor, and a probe terminal providing an electrical connection between the probe and the electric housing assembly, the secondary seal assembly comprising:an elongate extension housing adapted to be mechanically connected at one end to the adaptor and at another end to the electric housing assembly;a shaft insert received in the extension housing having a terminal at each of opposite ends, a first terminal for providing an electrical connection to the electric housing assembly and a second terminal for providing an electrical connection to the probe terminal; andseal means between the shaft insert and the extension housing for providing a secondary seal to the process vessel.