Main issues

• Permanent monitoring of the tightness of the stem sealing
  • Not only as a snapshot under testing conditions or under operation conditions elaborately with sniffing equipment
  • Monitoring in all operating conditions (independent of media, process pressure, process temperature, process-related load changes, …)
• Apllicability of the system to all quarter turn valves
  • Comparability of various valve types of various valve manufacturers
  • Independence of tests and certificates of manufacturers and inspection companies