Centrifugal Compressors
Oil and Gas Dry Gas Seal Panels are used to provide clean and pressurized seal gas to clean compressor shafts and seal leakage of process gas in upstream, midstream and downstream operations.
Best Hazardous Area Control Panel Manufacturers In Chennai
Preipolar Engineering specializes in panels for hazardous areas, with strong expertise in Dry Gas Seal Panels and Local Control Panels. A Dry Gas Seal Panel is a critical auxiliary system used with centrifugal compressors to supply clean, dry and pressurized seal gas to compressor shaft seals. This prevents gas leakage, ensures effective sealing, and maintains the safe and continuous operation of the compressor. Each system comes with filtration, pressure regulation, flow measurement, monitoring instruments, alarms and interlocks, which are directly connected to PLC or DCS systems. The panels protect the assets by preserving the right differential pressure, sealing leakage and routing of the vent gases in safe systems to the flare or recovery systems.
Our Local Control Panels provide operators with secure, real-time control at the equipment site while maintaining full connectivity with central automation systems. Whether installed in oil and gas plants, LNG terminals, refineries, petrochemical units or fertilizer and chemical industries, these panels are built to meet IEC, ATEX and IECEx standards and are tested for rugged performance. With ISO-certified manufacturing, precision-engineered components and field-proven reliability, Preipolar Engineering delivers hazardous area panels that improve equipment safety, extend compressor life and ensure uninterrupted process operations.
Types & Core Features of Preipolar Panels for Hazardous Areas
Dry Gas Seal Panel
An important auxiliary system used with centrifugal compressors, designed to supply clean, dry and pressurized seal gas to the shaft seal. Continuous compressor ensures safety and prevents dangerous gas leakage.
Main Functions
- Seal Gas Supply: Delivers filtered seal gas and maintains its pressure slightly above the compressor process pressure to stop inward leakage.
- Pressure Regulation: Controls and maintains the required differential seal pressure to avoid seal damage from low or excessive pressure.
- Leakage Management: Collects and routes seal leakage gas safely to the flare, vent, or recovery system.
- System Protection: Triggers alarms or shutdowns during low seal gas pressure, high leakage, or contamination to prevent hazardous gas release and protect the compressor.
Working Principle
- Seal gas (often taken from compressor discharge or external source) is filtered and conditioned.
- Regulated seal gas is delivered to primary and secondary seals.
- Leakage gas from seals is monitored and vented or sent to flare.
- PLC/DCS monitoring ensures alarms/trips in case of abnormal conditions.
Local Control Panel (LCP) for Hazardous Area
A Local Control Panel (LCP) is a field-mounted panel installed near equipment such as pumps, motors, compressors, and turbines. It enables operators to start, stop, monitor, and troubleshoot the equipment directly at site, and serves as a backup control option if the central control system is not available.
Main Functions
- Equipment Start/Stop Control: Includes push buttons and selector switches for starting, stopping, and changing between local and remote modes.
- Status Indication: Indicator lamps show equipment running, stopped, tripped, fault, and healthy conditions.
- Protection & Safety: Equipped with an Emergency Stop (E-STOP) switch and safety interlocks to ensure safe operation.
- Monitoring: Provides local measurement displays such as current, voltage, temperature, and pressure for quick onsite checks.
- Local/Remote Selector Switch: Allows control to be shifted between the Local Control Panel and the Central Control Room / DCS.
Where LCPs are Used
- Motors & Drives (Pumps, Fans, Blowers)
- Compressors & Turbines (auxiliary local operation panels)
- Boilers & Furnaces (burner management local panel)
- Process equipment (agitators, conveyors, mixers, etc.)
Typical Components & Features of Hazardous Area Panels
| Panel Type | Key Components |
|---|---|
| Dry Gas Seal Panel | Filter units for removing particles and moisture, Pressure regulators for seal gas supply, Flow meters/orifice assemblies, Pressure and temperature transmitters, Check valves/non-return valves, Vent and flare lines, Alarm and trip modules, Interlocks integrated with compressor PLC/DCS |
| Local Control Panel (LCP) | Operator interface with push buttons, selector switches, and indicators, Local HMI or touchscreen (optional), PLC/Relay-based logic modules, I/O modules for field signals, Trip/ESD relays and protective circuits, Terminal blocks and wiring assemblies, Communication modules for integration with DCS/SCADA, Rugged enclosure certified for hazardous area installation |
Choose Preipolar Engineers for Hazardous Area Panels
Specialized Oil & Gas Solutions
We engineer dry gas seals and local control panels optimized for oil, gas, LNG, and petrochemical applications with guaranteed safety.
Critical Equipment Protection
Our dry gas seal panels prevent compressor gas leakage, safeguarding machinery performance and ensuring compliance with emission control regulations worldwide.
Field-Proven Reliability
Every panel undergoes rigorous factory acceptance tests to ensure dependable operation even in extreme hazardous conditions and critical industrial processes.
Integrated Automation Compatibility
We design panels for seamless integration with PLC, DCS, and SCADA systems, supporting advanced automation, centralized monitoring, and emergency shutdowns.
Industrial Applications of Hazardous Area Panels in Chennai
Refineries & other Petrochemical Facilities
Panels run seal gas systems and local control functions, to guarantee a continuous operation of compressors and related machinery.
LNG & Gas Processing Facilities
Have pressure, flow, and safety interlocks of dry gas seals and other equipment that is hazardous to the cryogenic processes.
Fertilizer & Chemical Industries
Keep the significant rotating equipment safe and secure by controlling seal gas flow, leakages, and connecting to the PLC/DCS systems to provide alarms and trips.
Hazardous Area Local Control Operations
LCPs are real-time on-site monitoring and control systems and can be integrated with central SCADA or DCS systems to ensure safe and reliable operation of equipment in Zone 1 / Zone 2 environments.
Reliable Hazardous Area Solutions for Critical Operations
From dry gas seal panels that protect high-value compressors to local control panels designed for safe on-site operation, Preipolar delivers engineered solutions that meet the toughest industrial standards.
Important Questions on Hazardous Area Panels & Gas Seal
A dry gas seal panel supplies clean, filtered, and pressurized seal gas to the shaft seals of a compressor to avert leakage of process gas. In addition to equipment protection against damage, it averts hazardous emissions, thus providing environmental protection as well as regulatory compliance.
LCPs enable remote control and monitoring of on-site devices, shortening response time during an emergency. They have explosion-proof or flameproof enclosures for the safety of operation in nature-hazardous environments but are compatible with DCS/SCADA systems.
Yes, hazardous area panels can be made flexible in upstream drilling platforms, midstream gas processing facilities, and downstream refineries. They provide compressor reliability as well as safe control over the operation of every oil & gas process stage.
Apart from oil & gas, other applications include LNG plants, refineries, petrochemicals, fertilizers, and chemical plants. Any explosive atmosphere process that needs to be safely controlled and sealed for compressors is facilitated by such solutions.
All panels are thoroughly factory acceptance tested (FAT), pressure and leak tested for dry gas seal systems, and functionally validated for local controls. This guarantee ensures IEC/ATEX guidelines compliance and reliability under real plant conditions.
Yes, both LCPs and dry gas seal panels are engineered to integrate into plant-wide PLC, SCADA, or DCS systems. This minimizes the need for centralized monitoring and decentralized alarm management, allowing automatic shutdown on safety reasons when necessary, making the plant safer and more efficient.
