Kieley & Mueller Contol valve Type 1000 S/N 70-52583-1-2 Body 1 Bronze Rating 250 Trim 1ST Plug LTN.V-PORT Stroke 3/8 Diaphragm motor 36D 99SP137 Diaphragm press closes valve instr press Range 3-15PSI DIA PH Press Rang 3-15PSI. To read more about this Valve please visit http://www.flowmaticsinc.com/KM.html