Intelligent Diagnostics for Pipeline Valves
Proceedings Publication Date
Carlos Lorusso
Carlos Lorusso
Part of the proceedings of
From its industry-leading position, Tyco Flow Control has researched and  developed several  devices to assure the operation of critical automated packages.

The main pipeline valve are operated few times in his lifetime , but with drastic results if the operation is not good, like  human, environmental and properties damages  of big proportions

The first and elemental  solution is to use double block and bleed valves or double array valves  in order to check leakage during maintenance operation , closing 100% the valve , may be one at  year
The new technology  allows  early detection of valve + actuator future   failures  during normal and emergency operations and  partial stroke tests.

The partial stroke test allows to reduce the  MTI (Manual Test Interval)  that has direct influence in the PFD (probability of Failure to danger – Failure on Demand)   in order to reach high safety integrity level- SIL- with  safety instrumented systems according IEC61511 standard.

The torque curves and several events during the full or partial stroke allows to predict  failure in valve, actuator, solenoid or pneumatic  control system.

The intelligent electric actuators have capabilities to calculate and storage torque curves  of several  strokes, through the strain gage sensors or current complex analysis.

The piston actuators (linear or rotary, gas or hydraulic operated) requires of devices that measure and log: supply  pressure, exhaust  pressures, actuator chamber pressure, position and small time gaps between events in order to obtain data to do a device profile and to compare with the next operations, the inclusion of low consumption electronic devices doesn’t impact in remote standalone installations, that can be battery powered or solar powered.

The automatic or human analysis of this information allows to determinate the type of possible failures: actuator seal leakage, supply pressure availability during critical and combined operation, valve galling, exhaust blocked, solenoid delays, torque increasing, hydrodynamic torque effects during real operations and others.

This technology was developed in order to ensure the “next operation of the system”, reducing and avoiding cyclical preventive disassembling-assembling operations.

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