NghiaPP
Chemical
- Mar 7, 2005
- 25
Hi all,
I design a temperature controller for a heat exchanger. A by-pass line around one side is used to control the outlet temperature. The size of the main line and bypass line is large (14"), such as a three-way valve is not desired. A layout with two butterfly valves is suggested. But somebody is concerned the case both valves closed. A minimum stop is suggested for the valve on the heat exchanger line. But unfortunately, in some scenarios the heat exchanger needs total bypass. I heart earlier the same control system with mechanical coupling between two valves such as when one valve fully open, the other will be fully close. One actuator is used to moving both valves. It seems similar to a way three-way valve works. Unfortunately, I don't have any drawing or detailed how it is constructed and operated. I would appreciated if someone can help providing information and experience about the mechanical coupling valves system.
I design a temperature controller for a heat exchanger. A by-pass line around one side is used to control the outlet temperature. The size of the main line and bypass line is large (14"), such as a three-way valve is not desired. A layout with two butterfly valves is suggested. But somebody is concerned the case both valves closed. A minimum stop is suggested for the valve on the heat exchanger line. But unfortunately, in some scenarios the heat exchanger needs total bypass. I heart earlier the same control system with mechanical coupling between two valves such as when one valve fully open, the other will be fully close. One actuator is used to moving both valves. It seems similar to a way three-way valve works. Unfortunately, I don't have any drawing or detailed how it is constructed and operated. I would appreciated if someone can help providing information and experience about the mechanical coupling valves system.