Oil & Gas Plants (Onshore/Offshore)
Purge panels make the safe operation of PLCs, relays and instruments in the hazardous gas regions a reality without interruption in the process.
High-Performance Purge Panels for Hazardous Areas in Chennai
At Preipolar Engineering we design and manufacture purge panels that deliver safe and reliable automation for hazardous environments. A purged and pressurized enclosure, or purge panel, permits standard industrial electrical components to be used safely in locations where combustible gases, vapors or dust are present. The system initially purifies by means of a clean air or an inert gas, such as instrument air or nitrogen to clear all the trapped potentially dangerous elements and then pressurizes the enclosure to avoid subsequent entry. Such a design is provided to ensure PLCs, relays, and instruments can operate without risk in Zone 1 and Zone 2 gas zones or Zone 21 and Zone 22 dust environments.
Meeting the IEC, ATEX and NFPA standards, our purge panels are popular in oil and gas facilities, petrochemical plants, refineries, pharmaceutical plants, chemical units and even such industries as paint shops, grain handling and flour mills. Built under ISO-certified processes and tested for performance, every panel is engineered for durability, continuous protection and smooth integration with SCADA or DCS systems. Clients rely on Preipolar Engineering because we combine safety, engineering precision and cost efficiency to deliver purge panels that safeguard both people and assets in demanding industrial conditions.
- Purging System: Vents the hazardous gases or dust present within the panel prior to powering up.
- Pressurization: The positive pressure is maintained on the inside of the enclosure to prevent re-entry of the hazardous material into the enclosure.
- Safe Component Use: Authorizes the use of standard PLCs, relays and instruments in the Zone 1 and Zone 2 gas zones or Zone 21 and Zone 22 dust zones.
- Monitoring & Alarms: Onboard pressure and flow monitoring as well as alarms to maintain compliance with safety.
- Meeting of Standards: According to the IEC, ATEX, and NFPA requirements of hazardous environments.
Components & Design Features of Preipolar Purge Panels
| Panel Type | Key Components |
|---|---|
| Standard Purge Panel | PLC or controller (Siemens, Allen-Bradley, ABB), HMI/SCADA interface, Pressure transmitters, Flow sensors, Temperature sensors (RTDs, thermocouples), Relays and terminal blocks, Purge air supply and distribution system, Pressurization regulators, Alarms and interlocks, Protective enclosures compliant with IEC/ATEX/NFPA. |
| Dust-Protected Purge Panel | PLC/Controller, HMI/touchscreen, Particle and dust sensors, Pressure/flow transmitters, Purge and positive pressure system, Filter units for air/inert gas, Relays and I/O modules, Safety alarms and interlocks, Protective enclosure for Zone 21/22 applications. |
| Integrated Purge Panel | PLC/DCS integration modules, HMI/SCADA, Pressure and flow monitoring devices, Purge control valves, Inert gas or instrument air supply system, Relays, Terminal blocks, Alarms and interlocks for hazardous area compliance, Positive pressure monitoring system. |
Top Reasons to Trust Preipolar Engineering Purge Panels
Known Hazardous Area Knowledge
We have decades of experience with the development of purge panels that are certified to IEC/ATEX/NFPA, providing compliance and the highest operational safety in explosive environments.
Industry-Specific Customization
To ensure high-quality performance even in harsh conditions, we design purge panels to fulfill the demands in the oil and gas, chemical, pharmaceutical, and dust-prone industries.
Improved Safety Assurance
Our purge panels cover electrical equipment against flammable gases and dust that reduce the ignition risks and guarantees constant compliance with the safety standards of plants.
Long-Term Reliability
Our panels are built to last, using high-quality materials and efficient sealing methods which guarantee the equipment life of our products with minimal maintenance and downtime needs.
Preipolar Purge Panel Applications in Industry
Refineries & Petrochemical Plants
Panels protect the important control equipment in locations where there are inflammable liquids or vapors.
Pharmaceutical & Chemical Industries
Covers instrumentation at solvent-handling, reaction and mixing units.
Paint Shops & Solvent Handling Areas
Provide safe control of electrical and automation systems in the presence of combustible vapors.
Grain Handling, Flour Mills & Dust-Prone Industries
Dust-prone areas purge and pressurize panels to avoid ignition hazards.
Hazardous Area Compliance
Zone 1 / Zone 2 (Gas) and Zone 21 / Zone 22 (Dust) according to IEC, ATEX or NFPA standards.
Ensure Safety & Compliance with Preipolar Purge Panels
Protect your electrical and automation systems operating in hazardous environments with our certified purge panels. Whether your plant handles gases, solvents, or dust-prone materials, our panels provide the safety, compliance, and reliability needed for uninterrupted operations.
Common Questions About Purge Panels & Applications
Purge panels provide a secure location within electrical enclosures by constantly purging or pressurizing the enclosures with clean air or an inert gas. This prevents flammable vapors, gases, or dust and therefore minimizes the risk of ignition. They enable your automation and instrumentation equipment to be capable of safely operating in Zone 1, Zone 2, Zone 21, or Zone 22 environments.
Our purge panels are designed to meet international safety standards like IEC, ATEX, and NFPA. Safety compliance ensures equipment is always safe and reliable even in explosive environments, so operators can trust safety as well as performance.
Yes, purge panels can be engineered according to the hazard area classification, process needs, and industry standards. Pharmaceutical factories, for instance, might need stainless steel enclosures with surface finish, while grain mills will have dust-tight enclosures with enhanced filtration.
Through the exclusion of contaminants, purge panels prolong the life of electric equipment, minimize maintenance cycles, and remove unplanned downtime. This results in safer operations and increased overall plant productivity.
Usually in oil & gas plants, refineries, chemical and drug plants, paint booths, and grain-handling plants, any place electric systems must function safely in an otherwise potentially explosive environment.
Maintenance involves periodic inspections including checks of the air supply, purge flow meter inspection
, and pressure level maintenance. Through proper monitoring, they maintain long-term performance with minimal adjustments in maintenance.
