DIGITAL VALVE POSITIONER
Masoneilan Digital Valve Positioner
Masoneilan SVI II ESD Emergency Shutdown Device
Masoneilan SVI II ESD is a PST controller that mounts on a pneumatically actuated valve assembly. Its role is to position an emergency shutdown valve to 0% or 100% with a probability of failure on demand (PFD) in accordance with IEC61508 for SIL3 application (SIL = Safety Integrity Level). It replaces the solenoid that is typically utilized to actuate a spring-return, while providing extensive online valve diagnostics.
- Power Generation, Midstream Oil & Gas
- Refining, Petrochemicals