for together with the abrasive paste regularize imperfections in the seal seats of the PSVs valves.

The flow capacity of a relief valve is the relationship between the flow area and the pressure at which

The valve is set to open. This passage area, which is the smallest nozzle area, is standardized by the APIRP-526  by letters ranging from “D” to “T” (0.110 in² to 26 in²)。