If diesel fuel is used as a liquid fuel in the turbine, they heat the diesel fuel to a temperature of about 100 degrees in order to improve its viscosity. In such a situation, the best option for pumping fuel oil into the fuel injectors is double screw pumps. Considering that fluid filtration is very expensive and difficult in these conditions, the use of triple screw pumps is not possible due to the presence of impurity particles with the fuel. This pump model with a capacity of 102 cubic meters per hour and a working pressure of 35 bar has an external safety valve. In order to improve the performance of the above-mentioned double screw pump, Arshia took action to modify and update its mechanical seals.