Safety Aspects
VRU is installed in environment containing combustible liquids and explosive gases.
- Risks of fire and explosion with toxic emissions
- Preventive measures and risk analysis have to be performed:
- HAZOP
- ATEX explosion protection document (EXDOC)
- SIL safety integrity level risk assessment
EC declaration of conformity for the whole unit (§ 3.7.1.1)
- Manufacturer assumes responsibility for compliance with the directive
- Manufacturer should provide a conformity assessment of the whole assembly
- Manufacturer provides clear instructions for assembly / installation / operation / maintenance… in the operating manual.
Some of the VRU safety features:
- The whole system is explosion pressure proof to 9 bar
- All valves with open / closed limit switches
- Gasoline pumps installed below liquid level
- High and low level switches on the re-absorber column
- Temperature monitoring in the activated carbon beds
- Outlet temperature of the vacuum pumps < 50°C
- Detonation arrestor in the inlet
- Two positive closing valves in each gasoline circulation line
- Etc