Reference: Murray (D-R) Footprint and Revamp
The customer operated a Murray R type multivalve turbine which was built in 2006. This turbine is installed in a Petrochemical plant driving a blower. The blower was recently revamped and the client needed a drop-in steam turbine capable of matching the blower requirements. After the turbine was having a blade failures on the first state, the costumer got in contact with Siemens Energy to find the most suitable solution.
Siemens Energy recommended to install a new API 612 footprint turbine with different steam path components than original design while maintaining the existing footprint for the foundation as well as steam connection and shaft end. Blade type and material of the first stage of blades were upgraded to solve the failures. New design nozzle block with airfoil style and Trip and Throttle valve were included in the new design.
As shown in the figure below, the new steam turbine has an increase in capacity of 25% over the existing steam turbine.
The turbine has successfully past the spining test and will be installed soon.(Q2,2021)