5 way manifold for DP pressure transmitter for very low temperature around -110 degc
- Thread starter sabak149
- Start date
Check out pages 236-237 of Emerson's Engineer's Guide to DP Flow Measurement (2020)
You'll have to register to download the guide from the Emerson site
https://tinyurl.com/yxc4srer
Cryogenic measurement relies on allowing the cold liquid to vaporize in the impulse tubing and/or valve manifold and assume near-ambient temperature in order to avoid damaging the DP sensor with the cold cryogenic liquid.
The Rosemount guide regular and infrared photos of their close coupled DP on a valve manifold shows the transmitter body at ambient temperature. Note the ice surface temperature is warmer than the process liquid.
I don't think there's an issue with the valve manifold seals seeing -100°C, but why don't you ask Emerson and tell us what they say?
You'll have to register to download the guide from the Emerson site
https://tinyurl.com/yxc4srer
Cryogenic measurement relies on allowing the cold liquid to vaporize in the impulse tubing and/or valve manifold and assume near-ambient temperature in order to avoid damaging the DP sensor with the cold cryogenic liquid.
The Rosemount guide regular and infrared photos of their close coupled DP on a valve manifold shows the transmitter body at ambient temperature. Note the ice surface temperature is warmer than the process liquid.
I don't think there's an issue with the valve manifold seals seeing -100°C, but why don't you ask Emerson and tell us what they say?
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