Design and engineering validation of venturi flow meter for current feeder system of SST 1

Current feeder system (CFS) of steady state superconducting tokamak 1 (SST-1) consists of ten pair of vapour cooled current leads (VCCL). Helium vapour consumption of a VCCL is an important parameter to be measured accurately during operation of current leads. To measure flow precisely and accurately, we use venturi type flow element. A venturi flow element was designed for required flow rate with accuracy of approximately +/-1% and the same was machined, finally it was calibrated and validated to define its discharge co efficient and found to be in agreement with the designed value. These venturi flow elements with Differential pressure transmitter (DPT) have been installed in helium gas return network of current feeder system of SST-1. This paper describes design, validation and installation and commissioning of venturi flow element with its DPT.