Valves to use in Class 1 Div 2 Digester Site
Valves to use in Class 1 Div 2 Digester Site
(OP)
What is required? I have not been able to find out the type of valves that I should use. I've found some standards in CSA/TSSA for manual shut off valves for the digester/landfill sites but do not see anything regarding electrically/pneumatically operated valves.
Thanks in advance for anyone's input.





RE: Valves to use in Class 1 Div 2 Digester Site
RE: Valves to use in Class 1 Div 2 Digester Site
RE: Valves to use in Class 1 Div 2 Digester Site
If you do use anything electric or pneumatic - just make sure it meets the hazardous area classification. You should check to make sure it doesn't have to be class 1 div 1 for a valve in that piping system. I see in NFPA 820 which governs the hazardous locations for digesters - they state the area around piping is class 1 div 1 - but stuff at our plant doesn't totally comply with this. For instance the manufacturer of our flare used a nema 4x box on their skid which is right next to the flare and piping. gotta pick your battles sometimes I guess
What state are you in? Is it an anaerobic digestion site? Are you burning the biogas in CHP's for power? What are you doing with the digested sludge?