The Rotork PL5 is a high-performance control panel that utilizes pure pneumatic logic to manage pump operations. In industries such as Oil & Gas and chemical processing, electrical spark risks are a significant concern. The PL5 addresses this by performing complex control sequences—including automated start/stop, pressure-dependent switching, and emergency shutdown—using only compressed air or process gas as the signal medium.

Reliability in Harsh Environments

Unlike electronic PLCs that are susceptible to electromagnetic interference (EMI), moisture, and corrosion, the PL5’s pneumatic components are inherently robust. Housed in a heavy-duty 316 stainless steel enclosure, the system is impervious to the salt-laden air of offshore platforms and the aggressive atmospheres of chemical refineries. The lack of sensitive electronics ensures that the control logic remains functional even in the event of a total power failure.

Advanced Logic and Customization

The PL5 system is modular, allowing Rotork engineers to tailor the pneumatic logic to specific application needs. The panel can integrate timers for periodic pumping, level sensors for sump management, and pressure switches for high/low limit protection. Because it uses standard pneumatic connections, it can directly control air-operated double diaphragm (AODD) pumps or actuate the pilot valves of large pneumatic/hydraulic pump skids.

Key Features and Benefits

• Zero Spark Risk: Completely non-electrical operation makes it ideal for ATEX Zone 0/1/2 environments.
• Autonomous Operation: Requires no battery or external power grid, operating solely on the energy of the supply gas.
• High Durability: Designed for 20+ years of service in extreme conditions with minimal maintenance.
• Clear Interface: Features pneumatic visual indicators (green/red) and manual override buttons for operator interaction.
• Fail-Safe Logic: Can be configured to default to a safe state (open or closed) upon loss of signal or supply pressure.

Typical Applications

• Offshore Platforms: Managing chemical injection pumps and sump drainage.
• Refineries: Controlling flare knock-out drum pumps and emergency cooling systems.
• Remote Pipelines: Autonomous pump control where solar or grid power is unavailable.
• Mining: Dewatering systems in explosive underground atmospheres.