Controlled Volume Pumps-
Controlled Volume Pumps-
(OP)
In the COntrolled volume pumps - (as per API 675), the set pressures for the Internal and External safety valves are differently being followed by each vendor. Some vendor set the Internal set pressure more than the External RV set pressure and some vendors in the other way. Is this purely based on the design of the pump offered or based on any other factor?





RE: Controlled Volume Pumps-
Johnny Pellin
RE: Controlled Volume Pumps-
RE: Controlled Volume Pumps-
Lastly, if the internal valve has a lower set-point, it is still providing some additional protection. You external relief valve has to be tested according to some mechanical integrity program. Just because the external valve should never relieve does not mean it is not providing just as much protection. I don't see any value in trying to coordinate the set-point of these two relief valves that exist for totally different purposes.
Johnny Pellin
RE: Controlled Volume Pumps-
RE: Controlled Volume Pumps-