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Valves:
forged and cast high pressure valves: control, stop, check, blow down, globe, gate, ball,
piston, bellows sealed, instrument
Level gauges: magnetic level gauges, glass level gauges: transparent, reflex, bicolor
Cesare Bonetti - BONT - CMI Pasquini |
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Visitor number
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Last Update
06-02-2008 |
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"CMI Pasquini®"
Quick Acting Automatic "3 and 2 Way" Valves
for the Bypass System of High Pressure Preheaters
  This two valve system has been designed to prevent risks in case of failure
of High Pressure Preheaters.
It consists of one 3 way valve and one 2 way valve having both an internal piston
connected to the stem and sliding into a cylindrical chamber. In case of heater tube
bundle failure, a level switch sensing the water level in the Preheater shell will open
the exhaust valves generating differential pressure between the two parts of the
cylindrical chamber. This pressure difference actuates the stem movement, operating the
valves and deviating the flow, therefore bypassing the Preheater.
Operating speed can be controlled by an external regulating valve. All this system does
not need any external power (i.e. electrical or pnaumatical) so giving best protection in
case of accident.
We produce this system according to rating ASME 900, 1500, 2500 and Special Classes in
size up to DN 18".
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