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Focus Manutenzione e valvole per impianti industriali INFORMAZIONE PUBBLICITARIA

IMI Remosa

SIL 2 FCC catalyst slide valve

Operating between 538°C - 760°C and 1.72 The Safety Integrity Level (SIL) of the ESD function
- 2.41 barg, with oxygen and hydrocarbon depends on the Slide Valves.
atmospheres separated by only standpipes As well as it is important to have SIL certified field
of catalyst and differential pressures, the FCC sensors and logic solvers it is also important to
presents considerable risks to both equipment and have SIL certified slide valves assemblies.
personnel. IMI Remosa can supply the entire slide valves
Operational upsets can quickly cause serious assembly including Actuators and Hydraulic ESD
problems leading to production loss or equipment system with a third party SIL2 certificate for the
damage. safety function.
Slide valves are the most critical field equipment for
an FCC. Reliable and fast response of Slide valves KEY FEATURES
during Emergency Shut Down System (ESD) avoids • SIL2 HFT=0 for the entire valve package: ESD
damage or injury. The immediate and precise hydraulic system, Actuator and Slide Valve
response to abnormal unit conditions minimizes • Systematic capability SC=3, SIL3 HFT=1, it
unit downtime, personnel and equipment damage, means 2 slide valves in series meet a safety
and helps ensure faster operational recovery. integrity level of SIL3.
The Safety of the FCC plant depends on its ESD • All the hydraulic valves involved in the safety
and the Slide valves are the most important final function, including the hydraulically piloted
elements of the ESD. valves are SIL 2 certified with SC=3;
• The ESD accumulators are continuously
monitored for hydraulic fluid pressure and
nitrogen pre-charge pressure.
• Safety manuals and SIL certificate are provided
from the bidding stage.

Other features:
- Continuous Erosion monitoring (CM) to monitor
valve internals integrity is available upon request,
as alternative to periodic thermography
- Split ESD accumulators are available upon
request to minimize the spurious trip rate
(Option 1).
- Double 2oo2 ESD solenoid valves voting is
available upon request (Option 2).
- SIL 2 (SC=3) certified valves for automatic
isolation of non safety related hydraulics during
ESD are available upon request (Type 1).
Retrofitting:
Existing Slide Valves can be upgraded to meet SIL 2.
www.imi-critical.com

76 76 Impiantistica Italiana - Settembre-Ottobre 2020