Pressure Relief Valves with different inlet / outlet pressures OPM v440

Seeking information on the placement of Pressure Relief Valves with different inlet / outlet pressures. Have RV's with inlet CL300 and outlet CL150 the system will place the RV but the outlet flange can not be place due to a rating incompatibility. The Inst spec has the ratings defined in the outlet pressure field as the correct rating but it appears the the master rating of the component is overriding the other values. Have tested with the supplied Bentley Inst spec and the same issue occurs. 

Is it possible to have mixed ratings for this component or is this a schema change.

Regards

Grant

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