Intro4u2u

Pressure Tap For Gas

For non-condensing gasses, tapping point should be made to the side or upper quadrant of the process line and fitted with a suitable process isolation valve, The pressure transducer (transmitter) should be positioned above the tapping point with its process connection downwards to allow any condensate that may form to drain back into the process without blocking the impulse line. To ease service and commissioning the transducer should be fitted with an isolation valve and vent (or vent valve

Pressure Tap For Vapor/Steam

For vapor or steam service, the tapping point should be made to the side or upper quadrant of the process line and fitted with a suitable process isolation valve. The pressure transducer (transmitter) should be positioned below the tapping point so that the impulse line will stay filled with condensate in service. The distance below the impulse line should be chosen to ensure that adequate cooling occurs to prevent thermal damage to the transducer. For steam service the impulse line must be filled with water prior to startup to prevent possible thermal damage to the transducer by live steam. To ease service and commissioning the transducer should be fitted with an isolation valve and vent (or vent valve)

Pressure Tap for Liquid

For liquids, the tapping point should be made to the side or lower quadrant of the process line and fitted with a suitable process isolation valve. If sediments may be present, do not fit to the bottom of the process line. The pressure transducer (transmitter) should be positioned below the tapping point with its process connection upwards (if possible) to allow any gasses that may form to vent back into the process. To ease service and commissioning the transducer should be fitted with an isolation valve and vent (or vent valve)