Operation And Maintenance; Operational Overview - GE Masoneilan SVI II ESD Installation And Maintenance Manual

Smart valve interface with sil3 emergency shutdown pst controller

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8. Operation and Maintenance

SVI II ESD is Masoneilan's solution to improve safety in a processing plant; it is designed to

prevent and mitigate possibly uncontrollable situations. SVI II ESD is a SIL 3 compliant Smart

Valve Interface that continuously monitors the ESD valve operation of the and reports any

operational failures.

An emergency shutdown valve is a valve that operates to insure a safe state of a plant when

process conditions become or could become uncontrollable. Hundreds of ESD valves are part of

every petro-chemical and offshore production plant, as well as part of pipeline installations.

During normal operation, these valves are energized to stay open, with the means of a solenoid

valve. If an unsafe situation occurs, the ESD valve is de-energized. The solenoid valve vents the

pressure from the actuator chamber, to atmosphere. The accumulated static energy in the

actuator spring, provides the necessary force to bring the valve to its closed position.

Because of it data monitoring capability due to its embedded sensors, SVI II ESD is capable of

validating the health of its integral components. The ESD valve partially stroking capacity while

in normal operations (energized to stay open), enables validation of valve and actuator assembly

health. Periodic ESD valve testing reduces PFD (probability of failure on demand) since exercising

the valve reduces the risk of improper operations due to sticking, and confirms if an impending

problem would prevent the ESD valve to properly operate.

The ESD device performs as a smart solenoid to pneumatically activate an ON/OFF valve.

It is primarily used for safety instrumented systems (SIS) that require field devices to be

certified for safety related applications according to IEC61508.

It is certified by TUV for usage to a SIL3 safety integrity level.

Interacts with a SIS Logic solver.

Works with existing 24 VDC, 2 wire installations with superimposed HART

communications

Works with a 4-20 mA signal, 2 wire installations with superimposed HART

communications

Masoneilan SVI II ESD Installation and Maintenance Manual

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