A valve for use in a fuel supply system of a multi-fuel gas turbine, comprising: a valve body ; at least a first delivery pipe configured to be supplied with liquid fuel, a second delivery pipe configured to be supplied with a drain liquid and a third fluid delivery pipe configured to be supplied with a drain gas, the at least first, second and third delivery pipes being positioned on the valve body ; at least one outlet pipe positioned on the valve body and configured to be connected to one or more combustion chambers of the gas turbine; and a spherical shutter inside the valve body rotatable about a transverse axis relative to the delivery pipes and the at least one outlet pipe and comprising a first and a second distribution channel formed on the shutter such that: in a first position of the shutter , the first distribution channel is configured to allow fluid communication between the first delivery pipe and the at least one outlet pipe , in a second position of the shutter , the first distribution channel is configured to allow fluid communication between the second delivery pipe and the at least one outlet pipe , and in a third position of the shutter , the second distribution channel is configured to allow fluid communication between the third delivery pipe and the at least one outlet pipe , characterized in that the first and the second distribution channel (26, 28; 60, 62) of the shutter extend in separate planes to each other in order to avoid fluid communication between the said channels. a valve body ; at least a first delivery pipe configured to be supplied with liquid fuel, a second delivery pipe configured to be supplied with a drain liquid and a third fluid delivery pipe configured to be supplied with a drain gas, the at least first, second and third delivery pipes being positioned on the valve body ; at least one outlet pipe positioned on the valve body and configured to be connected to one or more combustion chambers of the gas turbine; and a spherical shutter inside the valve body rotatable about a transverse axis relative to the delivery pipes and the at least one outlet pipe and comprising a first and a second distribution channel formed on the shutter such that: in a first position of the shutter , the first distribution channel is configured to allow fluid communication between the first delivery pipe and the at least one outlet pipe , in a second position of the shutter , the first distribution channel is configured to allow fluid communication between the second delivery pipe and the at least one outlet pipe , and in a third position of the shutter , the second distribution channel is configured to allow fluid communication between the third delivery pipe and the at least one outlet pipe , characterized in that the first and the second distribution channel (26, 28; 60, 62) of the shutter extend in separate planes to each other in order to avoid fluid communication between the said channels. in a first position of the shutter , the first distribution channel is configured to allow fluid communication between the first delivery pipe and the at least one outlet pipe , in a second position of the shutter , the first distribution channel is configured to allow fluid communication between the second delivery pipe and the at least one outlet pipe , and in a third position of the shutter , the second distribution channel is configured to allow fluid communication between the third delivery pipe and the at least one outlet pipe , characterized in that the first and the second distribution channel (26, 28; 60, 62) of the shutter extend in separate planes to each other in order to avoid fluid communication between the said channels. <EOS>