Incorprating twin self centring GIS/E4 gas bags with multi service core spines (up to 9 services can be accommodated). Developed with Advantica the system provides a number of solutions.
•	Intelligent double bag seal isolates tyest section. Control of inter-bag pressure gives 'vertual' seal.
•	D/4 access - avoids output and bypass operations.

•	Laptop PC controls both ends and logs pressure drop data - automated data collection.
•	Enables low cost medium pressure and larger diameter testing.