s.i.g. Sigra Imprim Group
DB1
Blocking device
Safety in Gas Flow Control
The DB1 shut-off device is an innovative solution designed entirely by S.I.G. It is used to intercept the flow downstream of a cryogenic fluid vaporiser when the gas temperature falls below the minimum threshold specified in the plant design, as required and specified by the Circular. ISPESL Circ. no. 09 dated 19/07/04.
It therefore performs a safety function aimed at preventing the risk of breakage caused by low temperatures where the equipment and materials downstream of the vaporisation system are made of non-resilient materials.
DB1 complies with the highest safety and quality standards, in accordance with Regulation (EC) No. 1272/2008 and relevant directives, ensuring compatibility with oxygen and adaptability to a wide range of operating temperatures.
Advanced Technology for Maximum Reliability
Each DB1 device integrates advanced features to offer:
- Operation without any external power supply; it is self-powered by utilizing process gas.
- Continuous monitoring of gas temperature for precise blocking action.
- Remote alerts for efficient management of alarms and system functionality.
Main Features:
- Temperature sensor
- Pneumatic logic
- Pneumatically activated blocking valve
- Pneumatic acoustic alarm / visual indicator
- Gases: N2 / Ar / CO2 / O2
- Project pressure: 40 bar
- Design temperature: Tmin – 25°C / TMax + 50°C
- Oxygen-compatible materials: Brass OT58, Bronze B10, PTFE, FKM, Stainless steel
Flexible Configurations for Every Need
Available Sizes: DN25 / DN40 / DN50 / DN80
Customised version: For some systems where the line pressure is insufficient to open the pneumatic valve, it is possible to insert a bypass system called an ‘auxiliary inlet’ in order to supply the pneumatic system with an external source provided by the customer.