Inquiry (采购产品): Quick opening valves In a burner methane line for a directly fired oven is allowed to install the quick shut off (normally closed) valves upstream of the pressure regulator? (in the flow direction: shut off valve followed by the pressure regulator followed by a process temperature control valve?) or must the shut off valves be installed downstream of the pressure regulators and the process temperature control valve?. What is the maximum pressure for the 3 and 4 inches shut off valves, in the pressure ratings table is indicated 40 psi, is this the amximum? Best regards **** Hidden Message ***** MANUEL LARA CALLED 7 LOTE 15 MANZANA 5 MINATITLAN, VERACRUZ, AL 96850 MEX Company: AUTOMATIZACIóN INDUSTRIAL DEL SURESTE, S. A. DE C. V. Title: PROJECT ENGINEER Phone: 922 22 3 17 39 Fax: 922 22 3 17 39 E-mail: mlarasoto@yahoo.com.mx **** Hidden Message ***** mlarasoto@yahoo.com.mx