| Advanced
products: |
| High
Temperature Valves: |
| This
valve is made of a traversing bullet shaped bar. This profiled bar
crosses all the body of the valve. The flow passes around the profiled
bar. The profiled bar and the body are shaped on the same complementary
profile. Turbulence and pressure drop in the valve are minimized. Flow
rate is equivalent to a full-opening valve. |
| |
| Main
parts of the mechanism are two profiled caps: the closure head and the
isolation head. |
| |
| To
avoid sticking of closure head at high temperature conditions, the
valve closing is done as following in two sequences. |
| Down
stream closure head, tights the flow. |
| Up
stream isolation head, isolates the mechanism inside bar and prevents
heat convection effect between valve cavity and heated gas from the
circuit. |
| It
minimizes elevation of temperature around the profiled bar. The
mechanism is cooled to |
| evacuate
conduction heat coming through the valve walls. |
| |
| Closure
head is autoclave to the back seat. The higher is the pressure, the
closer is the valve. The cap is maintained in position by an hydraulic
jack to avoid opening in case of reverse pressure. |
| |
| Opening
is done in two sequences. First sequence realizes a leak between the
two sides of closure head. Difference of pressure between both sides of
the valve is reduced. |
| When
closure head is isobar, it moves back to the profiled bar. |
| |
| The all
profiled bar, where the valve mechanism is, is filled by a circulating
coolant. Each part of the mechanism is in contact with cool |
| ant, so
cooling is efficient enough for high temperature applications. |
