A system, comprising: a first heat exchanger having a heat exchanger shell; a first cooling fluid supply head removably coupled to the heat exchanger shell, comprising: a first cooling fluid entry conduit configured to flow a cooling fluid flow into the first heat exchanger; a first cooling fluid exit conduit configured to flow the cooling fluid flow out of the first heat exchanger; and a first flow control valve configured to regulate the cooling fluid flow through the first heat exchanger; wherein the first flow control valve includes a valve housing formed as an integral portion of the supply head and a removable valve element disposed within the valve housing, and a second cooling fluid supply head coupled to the heat exchanger shell, wherein the second cooling fluid supply head comprises: a second cooling fluid entry conduit configured to flow the cooling fluid flow into a second heat exchanger, wherein the second cooling fluid entry conduit is fluidly coupled to the first cooling fluid entry conduit; a second cooling fluid exit conduit configured to flow the cooling fluid flow out of the second heat exchanger, wherein the second cooling fluid exit conduit is fluidly coupled to the first cooling fluid exit conduit; and a second flow control valve configured to regulate the cooling fluid flow through the second heat exchanger, wherein a system entry conduit is formed by the first and second cooling fluid entry conduits and a system exit conduit is formed by the first and second cooling fluid exit conduits, wherein the first and second flow control valves are positioned along the system entry conduit or the system exit conduit such that the cooling fluid flow can be regulated to or from the first cooling fluid supply head and the second cooling fluid supply head. a first heat exchanger having a heat exchanger shell; a first cooling fluid supply head removably coupled to the heat exchanger shell, comprising: a first cooling fluid entry conduit configured to flow a cooling fluid flow into the first heat exchanger; a first cooling fluid exit conduit configured to flow the cooling fluid flow out of the first heat exchanger; and a first flow control valve configured to regulate the cooling fluid flow through the first heat exchanger; wherein the first flow control valve includes a valve housing formed as an integral portion of the supply head and a removable valve element disposed within the valve housing, and a first cooling fluid entry conduit configured to flow a cooling fluid flow into the first heat exchanger; a first cooling fluid exit conduit configured to flow the cooling fluid flow out of the first heat exchanger; and a first flow control valve configured to regulate the cooling fluid flow through the first heat exchanger; wherein the first flow control valve includes a valve housing formed as an integral portion of the supply head and a removable valve element disposed within the valve housing, and a second cooling fluid supply head coupled to the heat exchanger shell, wherein the second cooling fluid supply head comprises: a second cooling fluid entry conduit configured to flow the cooling fluid flow into a second heat exchanger, wherein the second cooling fluid entry conduit is fluidly coupled to the first cooling fluid entry conduit; a second cooling fluid exit conduit configured to flow the cooling fluid flow out of the second heat exchanger, wherein the second cooling fluid exit conduit is fluidly coupled to the first cooling fluid exit conduit; and a second flow control valve configured to regulate the cooling fluid flow through the second heat exchanger, a second cooling fluid entry conduit configured to flow the cooling fluid flow into a second heat exchanger, wherein the second cooling fluid entry conduit is fluidly coupled to the first cooling fluid entry conduit; a second cooling fluid exit conduit configured to flow the cooling fluid flow out of the second heat exchanger, wherein the second cooling fluid exit conduit is fluidly coupled to the first cooling fluid exit conduit; and a second flow control valve configured to regulate the cooling fluid flow through the second heat exchanger, wherein a system entry conduit is formed by the first and second cooling fluid entry conduits and a system exit conduit is formed by the first and second cooling fluid exit conduits, wherein the first and second flow control valves are positioned along the system entry conduit or the system exit conduit such that the cooling fluid flow can be regulated to or from the first cooling fluid supply head and the second cooling fluid supply head.