ELIMINATE THE IMPULSE LEGS Consider the following points: 1. Impulse legs to the pressure transmitters are plugging frequently. Eliminate impulse legs altogether by using pressure transmitters with diaphragm seals and capillaries. (Some vendors call them remote diaphragm seals.) [Ed.: for information on such seals, see "Rethink Distillation Column Pressure Measurement," http://bit.ly/2x2l4KR.] Thus, the process stream containing particulates does not come in contact with the capillary. The diaphragm is bolted onto the tank nozzle. The diaphragm senses pressure, which is transmitted to the pressure transmitter. This arrangement should reduce, or even eliminate, the frequent plugging problem.
展开▼
