Importance

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Abstract

Apparatus for measuring the pressure within a fluid-conveying member of a mixture of a fluid and particulate solids comprises an outlet port in the fluid-conveying member, a buffer vessel having walls defining a buffer volume for containing a buffer medium, the buffer vessel having first and second end portions, and having a measuring outlet at the first end portion being in fluid communication with the outlet port of the fluid-conveying member. An impulse conduit has its first end in fluid communication with the second end portion of the buffer vessel and a fluid pressure measuring device is in fluid communication with the second end of the impulse conduit. A source of purging medium is in fluid communication with the second end portion of the buffer vessel. The flow of the purging medium is controlled to establish a back pressure in the buffer vessel sufficient to prevent particulate solids which flow into the buffer vessel from the fluid-conveying member from reaching the impulse conduit.

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First Claim