High Vacuum Laboratory is primarily responsible for maintaining the vacuum, vacuum systems, and diagnostic devices in the beamlines and experimental facilities. There are about 600 instruments (pumps, gauges, valves, diagnostic BPM, Faraday cups, device controllers, etc.) installed and running in different places. Faulty instruments are replaced with available spares to reduce downtime. Indigenously designed and fabricated instruments are repaired in-house and others are maintained with available expertise in house and manufacturer's service support. The group provides support to different labs and users in vacuum-related problems. Details of the activities will be updated soon.