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Process Fundamentals

Process Control Loop Testing

S Bharadwaj Reddy
A very useful technique for testing process control loop response is to subject it to a “step-change” in controller output. In other words, the process is perturbed (the highly technical...

Process Control High Level Alarm Fault Analysis

S Bharadwaj Reddy
An operator reports a high level alarm (LAH-12) displayed at the control room for the last 13 hours of operation, in this sour water stripping tower unit (where sulfide-laden water...

Blowout preventer (BOP) Principle

S Bharadwaj Reddy
A blowout preventer (BOP) is a large, specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil and/or natural gas from a...

Flame Arrester Principle

S Bharadwaj Reddy
A flame arrester (also spelled arrestor), deflagration arrester, or flame trap is a device that stops fuel combustion by extinguishing the flame. A flame arrester (also called a deflagration arrester) functions by absorbing the heat from a flame front traveling at...

Strainers

S Bharadwaj Reddy
Strainers are fitted in many piping lines to prevent the passage of grit, scale, dirt, and other foreign matter, which could obstruct pump suction valves, throttle valves, or other machinery...

Backwashing Precoat Filters

S Bharadwaj Reddy
Filtration is a process used to remove suspended solids from a solution. Other processes such as demineralization remove ions or dissolved ions. Different filters and strainers are used for different...

Cartridge Filters

S Bharadwaj Reddy
Filtration is a process used to remove suspended solids from a solution. Other processes such as demineralization remove ions or dissolved ions. Different filters and strainers are used for different...

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