S/N 299075. Max working conditions = 100 PSI @ 190°F. Heat exchanger with two circulating pumps and control valve all mounted on a stainless steel skid. Exchanger is Mueller Accu-Therm with National Board Number NB35295 and is rated for 100 psi. Exchanger is a Model AT4-C-20. Stainless steel pumps manufactured by Moyno, order number ZM4348502, with 1/2 HP DC motor. Other pump is a Goulds model MCC Size 1x1-1/4-6, catalog number 1MC1D5D0, serial number A033949U, with 4.5" impeller with 3/4 HP, 3450 RPM motor, 208-230/460 volt. Control valve on discharge of Goulds pump exchanger needs plates. Unit is ideally set up for lab or small pilot plant use.