Intrinsically safe pressure switches, when used with approved zone barriers, provide reliable pressure monitoring and control in hazardous environments where explosive gases or dust may be present. These switches and barriers work together to limit the electrical energy in the circuit, preventing ignition of flammable atmospheres. This makes them suitable for use in a wide range of industrial and research applications.
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Find out more about Intrinsically Safe Pressure Switches to determine which product options and capabilities will best meet your application requirements.
Intrinsically safe pressure switches are designed for use in hazardous environments but only when connected in conjunction with a suitably approved zone barrier. These barriers are installed between the switch and the control system in a safe area to further limit the electrical energy that could potentially enter the hazardous area. The combination of the intrinsically safe pressure switch and the zone barrier ensures that the electrical energy within the switch circuit is insufficient to ignite a flammable atmosphere.
Applications
Oil and Gas
- Monitoring pressure in pipelines, wellheads, and storage tanks to prevent overpressure or underpressure conditions that could lead to leaks or ruptures.
- Controlling pumps and compressors to maintain safe operating pressures within process systems.
- Activating emergency shutdown systems in the event of a pressure anomaly.
Chemical Processing
- Controlling the pressure in reactors, distillation columns, and mixing vessels to ensure safe and efficient chemical reactions.
- Monitoring pressure in storage tanks and pipelines to prevent hazardous leaks or spills.
- Triggering alarms or safety systems when pressure levels exceed predetermined limits.
Pharmaceuticals
- Ensuring the safe operation of pressure vessels and process equipment used in the production of pharmaceuticals.
- Maintaining precise pressure control during critical processes such as sterilization and filtration.
- Protecting sensitive equipment from damage caused by pressure fluctuations.
Wastewater Treatment
- Monitoring pressure in pumps, filters, and pipelines to optimize system performance and prevent equipment failure.
- Controlling the flow of wastewater through treatment processes.
- Detecting blockages or leaks in pipelines.
Mining
- Controlling pressure in ventilation systems to ensure a safe and breathable atmosphere for underground workers.
- Monitoring pressure in hydraulic systems used in mining equipment.
- Triggering alarms in the event of a pressure drop that could indicate a ventilation system failure.
Examples of On/Off Switch Controlled Processes
- Controlling a pneumatic valve actuator: The pressure switch can activate a solenoid valve on a pneumatic valve actuator to open or close a valve, regulating the flow of flammable liquids or gases in a pipeline based on pressure changes.
- Activating an alarm beacon: If the pressure in a vessel containing flammable gas exceeds a safe limit, the switch can trigger an intrinsically safe alarm beacon to alert personnel to the potential hazard.
- Controlling a flameproof motor: The switch can be used to start or stop a flameproof motor in a ventilation system based on the pressure in the ductwork.
- Operating an intrinsically safe solenoid valve: The switch can control an intrinsically safe solenoid valve to isolate a section of pipeline in the event of a pressure anomaly.
- Interlocking a process: The switch can be integrated into a safety interlock system to prevent a process from starting if the pressure in a vessel containing flammable materials is outside of the safe operating range.
These examples illustrate how intrinsically safe pressure switches play a vital role in maintaining safety and controlling processes in hazardous areas where flammable gases or dust are present. By providing reliable pressure monitoring and switching capabilities in conjunction with suitable zone barriers, they help to prevent accidents, protect equipment, and ensure efficient operation.