6900GZE Series Pressure Switch

• Boilers & Burners
• Chemical & Petrochemical Plants
• Chemical Refining & Processing
• Control / Annunciator Panels
• De-greasers & Evaporators
• Filtration
• Fluid Management
• Food Processing
• Ground Support Equipment
• Hydraulic & Lubrication Systems
• Heating & Air Conditioning
• Manufacturing Process
• Marine Equipment
• Monitor & Control
• Offshore Oil Rigs & Platforms
• Oil & Gas
• Pipelines
• Power Generation
• Power Plants
• Pulp & Paper Mills
• Pump Jacks
• Pump Control
• Pumps, Compressors & Turbines
• Recovery Systems
• Refineries
• Relay Alarm Systems
• Reverse Osmosis Systems & Filters
• Safety - Alarm, Shutdown
• Safety Systems
• Specialized OEM Equipment
• Steel Mills
• Turbines
• Utilities
• Water Treatment
• Waste & Sewage Treatment Facilities

1. OIL & GAS

1. Onshore Drilling Rigs – Monitoring blowout preventer (BOP) hydraulic pressure.

2. Offshore Production Platforms – Pressure control in multiphase separation trains.

3. Wellheads – Gas-lift injection pressure to optimize production.

4. Subsea Production Systems – Monitoring subsea well tree (Christmas tree) pressure.

5. Pump Jacks – Overpressure alarms on rod pump discharge lines.

6. Crude Pipeline Pump Stations – Ensuring mainline pumps do not exceed discharge limits.

7. Gas Compression Stations – Monitoring suction/discharge pressure in compressors handling flammable gas.

8. Refinery Distillation Columns – Overhead vapor pressure detection to prevent overpressure.

9. Hydrocracker Units – High-pressure hydrogen reaction vessel monitoring.

10. Catalytic Reformers – Reactor pressure controls for flammable feedstocks.

11. Fuel Loading/Offloading Terminals – Tank truck or ship manifold overpressure prevention.

12. Floating Production Storage & Offloading (FPSO) – Process separator overpressure safety.

13. Gas Gathering Systems – Flowline pressure monitoring where light hydrocarbons can accumulate.

14. Vapor Recovery Units (VRUs) – Overpressure alarms in tank vapor collection systems.

15. Natural Gas Storage Caverns – Monitoring gas injection and withdrawal pressure.

16. Desalters – Overpressure detection in crude-oil/water separation vessels.

17. Sour Gas Treating Units – Monitoring amine absorber tower pressure.

18. Sulfur Recovery (Claus Process) – Reactor overpressure alarms.

19. Hydrodesulfurization (HDS) – Reactor pressure in high-pressure hydrogen environment.

20. Gas Fractionation Columns – Overpressure detection in de-ethanizer or de-propanizer.

21. Oil & Gas-Fired Heaters – Fuel gas line overpressure checks for burners.

22. LNG Liquefaction Trains – Monitoring cryogenic refrigerant circuit pressure.

23. LNG Regasification Terminals – Vaporizer overpressure detection.

24. Gas Dehydration Units – TEG (triethylene glycol) contactor tower pressure.

25. Produced Water Treatment – Overpressure in skimming or separation vessels.

26. Enhanced Oil Recovery (EOR) – CO₂ injection wellhead pressure alarms.

27. Gas Lift Manifolds – Monitoring high-pressure injection lines.

28. Artificial Lift Systems – Overpressure detection in electric submersible pump (ESP) lines.

29. Oil Terminal Tank Farms – Tank blanketing pressure control with inert gas.

30. Flare Gas Knock-Out Drums – Overpressure alarms before gas is routed to flare.

31. NGL (Natural Gas Liquids) Processing – De-ethanizer overhead pressure monitoring.

32. Gas Sweetening – H₂S removal columns overpressure.

33. Well Testing Packages – Pressurized flowline monitoring during test operations.

34. Pipeline Pig Launchers – Pressure safety ensuring safe pig launching/retrieval.

35. Gas Transmission Regulators – Overpressure switch to protect downstream piping.

36. Crude Stabilization Units – Vapor pressure monitoring for safer transport.

37. Catalyst Regeneration – Monitoring regenerant gas pressure.

38. Gas Sales Metering Stations – Pressure threshold switches for custody transfer.

39. Safety Instrumented Systems (SIS) – Triggering ESD (Emergency Shutdown) valves.

40. Drilling Mud Pumps – High-pressure fluid lines in drilling mud circulation systems.

2. CHEMICAL & PETROCHEMICAL

1. Reaction Vessel Safety – Overpressure in exothermic chemical reactors.

2. Distillation Towers – Column overhead pressure control for flammable solvents.

3. Polymerization Reactors – Monitoring monomer feed pressure (e.g., PVC, polyethylene).

4. Catalytic Reactors – Overpressure alarms in feed or recycle gas lines.

5. Ethylene Cracking Furnaces – Monitoring fuel gas pressure for furnace burners.

6. Propylene Production – Reactor effluent pressure to prevent runaways.

7. Polypropylene Units – Overpressure detection in polymer loop reactors.

8. Ethanol Production – Overpressure in fermentation vessels with flammable vapors.

9. Isomerization Units – Maintaining stable reaction bed pressures (e.g., for isobutane).

10. Alkylation Units – HF or sulfuric acid contactor overpressure alarm.

11. Aromatics Extraction – Solvent loop pressure in processes handling benzene/toluene.

12. Solvent Recovery Systems – Vapor line pressure with flammable solvents.

13. Hydrogenation Reactors – High-pressure hydrogen feed lines for specialty chemicals.

14. Chlorination Units – Overpressure in chlorine feed lines.

15. Sodium Hypochlorite Production – Reactor pressure with chlorine gas.

16. Urea Synthesis – Carbamate condenser high-pressure alarms.

17. Ammonia Plants – Synthesis loop pressure in Haber-Bosch process.

18. Nitric Acid Units – Absorber tower overpressure detection.

19. Sulfuric Acid Plants – Converter bed or furnace off-gas pressure.

20. Phosphoric Acid Units – Reactor vessel overpressure with phosphates.

21. Formaldehyde Production – Reactor feed pressure alarms.

22. Phenol Production – Oxidation reactor overpressure.

23. Acetone Production – Pressure in processes using cumene or isopropanol.

24. Ethylene Oxide Reactors – Overpressure detection in highly flammable environment.

25. Hydrogen Peroxide Plants – Oxidation reactor pressure.

26. Vinyl Chloride Monomer (VCM) – Reactor overpressure in PVC feedstock production.

27. PVC Polymerization – Sealed reactor overpressure detection.

28. LDPE/HDPE Reactors – Extremely high-pressure polymerization lines.

29. TDI/MDI Polyurethanes – Overpressure in isocyanate feed lines.

30. Fertilizer Granulation – Ammonia injection line overpressure.

31. Biofuel Production – Overpressure detection in enzymatic or thermochemical reactors.

32. Adipic Acid Plants – Reactor vessel overpressure (nylon feedstock).

33. Nylon Production – Polycondensation reactor overpressure.

34. Styrene Monomer – Dehydrogenation reactor for styrene production.

35. Polyester Resin Production – Overpressure in esterification reactors.

36. Epoxy Resin Synthesis – Reactor feed lines with flammable raw materials.

37. Specialty Chemicals – Pilot plant microreactor overpressure.

38. Pilot/R&D Facilities – Explosion-proof instrumentation for new process development.

39. Tank Farms – Overpressure in flammable chemical storage (various chemicals).

40. Gas Scrubbers – Overpressure detection in acid or caustic scrubbing systems.

3. PHARMACEUTICALS & BIOTECHNOLOGY 

1. Fermentation Tanks – Monitoring microbial fermentation pressure (CO₂ buildup).

2. API Synthesis Reactors – Overpressure alarms in multi-step organic synthesis.

3. Solvent Extraction Units – Volatile, flammable solvent pressure control.

4. Vacuum Dryers – Ensuring safe transitions to/from vacuum in flammable environments.

5. Lyophilization Chambers – Partial vacuum with possible flammable cryoprotectants.

6. Bioreactors – Gas sparging pressure (O₂, CO₂) in cell culture or microbial processes.

7. CIP (Clean-In-Place) Systems – Detergent or sanitizer lines under pressure.

8. Solvent Recovery Columns – Monitoring vapor line overpressure from alcohol/acetone.

9. Bulk Drug Manufacturing – Hydrogenation steps for certain APIs.

10. Antibiotic Fermentation – Overpressure detection in high-volume fermenters.

11. Vaccine Production – Monitoring CO₂ pressure in sealed fermentation systems.

12. Cytotoxic Drug Handling – Sealed environment with negative pressure requirements.

13. Hormone Synthesis – Overpressure in batch reactors with flammable solvents.

14. Pilot Scale R&D Reactors – Explosion-proof instrumentation in uncertain reaction conditions.

15. Biosafety Level 3 (BSL-3) Labs – Containment pressure integrity.

16. Spray Drying – Powder-laden environment with flammable solvents.

17. Granulation Processes – Dust-laden environment requiring explosion-proofing.

18. Tablet Coating – Organic solvent-based coating lines.

19. Hard Capsule Filling – Vacuum or inert gas lines with volatile materials.

20. Sterile Filtration – Steam or gas pressure control in sterile lines.

21. CIP Skids – Overpressure detection in chemical wash cycles.

22. Gassing/De-gassing Steps – Explosion-proof monitoring during pH adjustment with CO₂.

23. Bulk Chemical Storage – Inert gas blanketing to prevent solvent ignition.

24. Biohazard Waste Treatment – Overpressure detection in sealed incineration/autoclave.

25. Plasma Fractionation – Pressure in fractionation columns with flammable refrigerants.

26. Cell Culture Bioprocessing – Oxygen or CO₂ feed line pressures.

27. Single-Use Bioreactors – Bag overpressure monitoring.

28. Pilot Freeze Dryers – Overpressure in vacuum lines with residual solvents.

29. GMP Warehousing – Explosion-proof sensors near stored flammable chemicals/solvents.

30. Distillation of Solvents – Overpressure detection in volatile solvent reclaim.

31. Alcohol-Based Sanitizers – Overpressure in iso-/ethanol lines.

32. Fine Powder Blending – Dust-laden environment for potent APIs.

33. Ethanol-Based Tincture Production – Overpressure in extraction vessels.

34. Aeration Tanks – Explosion-proof fans in high CO₂ or O₂ environment.

35. Aseptic Fill-Finish – Cleanroom operations involving flammable agents.

36. Vaccine Adjuvant Prep – Mixing vessels with flammable components.

37. Gene Therapy Labs – Pressurized gas lines with flammable disinfectants.

38. Reactor Cooling Systems – Overpressure detection for flammable coolants.

39. Concentrated Acid/Alkali Lines – Explosion-proof couplings in enclosed spaces.

40. High-Shear Mixing – Solvent-laden environment for drug formulation.

4. POWER GENERATION & UTILITIES

1. Hydrogen-Cooled Generators – Overpressure detection in H₂ supply lines.

2. Gas Turbine Fuel Lines – Monitoring natural gas or syngas feed pressure.

3. Diesel Generator Stations – Fuel line overpressure alarms.

4. Coal Power Plant Pulverizers – Explosion-proof monitors in coal dust areas.

5. Biomass Gasification – Syngas line pressure detection.

6. Waste-to-Energy Plants – Overpressure in flue gas or feed lines.

7. Gas Turbine Inlet Air Fogging – Monitoring pressurized water lines in flammable environments.

8. Combined Cycle Plants – HRSG (Heat Recovery Steam Generator) drum pressure.

9. Nuclear Power Plants – Overpressure in hydrogen recombiner or off-gas system.

10. Geothermal Plants – Steam line pressure (may contain flammable gases).

11. Wind Turbine Nacelles – Explosion-proof for hydraulic or gear oil lines.

12. Hydroelectric Powerhouses – Lubrication lines in potential flammable or high-pressure zones.

13. Substation Transformers – Explosion-proof monitoring of insulating oil pressure.

14. Gas Insulated Switchgear (GIS) – SF₆ gas pressure detection (though not flammable, strict containment).

15. Peaker Power Stations – Overpressure detection for natural gas or diesel feeds.

16. Pumped Storage Hydroelectric – Pipeline penstock overpressure.

17. Municipal Electric Utilities – Backup generator fuel line pressure control.

18. Boiler Feedwater Systems – Explosion-proof switches where flammable treatments may be used.

19. Steam Condensate Return – Monitors in high-temperature pressurized lines.

20. Ash Handling Systems – Dust-laden environment requiring explosion-proofing.

21. Duct Firing – Overpressure detection in supplemental gas burners.

22. Water Treatment for Power – Chemical dosing under pressure (e.g., flammable anti-scalants).

23. Cooling Towers – Overpressure in lines carrying chemical treatments.

24. Diesel Fuel Polishing – Monitoring line pressure for backup generator fuel.

25. Fuel Oil Day Tanks – Overpressure alarms in enclosed tanks.

26. High-Pressure Steam Headers – Explosion-proof sensor housings in case of flammable environment.

27. Gas Mixing Systems – Overpressure for inert or flammable purge lines.

28. Fuel Gas Conditioning Skids – Monitoring dewpoint heaters and filters for overpressure.

29. H₂ Fuel Cell Backup Power – Overpressure detection in hydrogen lines.

30. Landfill Gas to Energy – Monitoring methane pipeline from landfill.

31. Biogas from Wastewater – Overpressure in digester gas lines for power generation.

32. Off-Gas Treatment – Monitoring pressure in flammable vent lines.

33. Gas Turbine Lube Oil Systems – Explosion-proof for hot surfaces in close quarters.

34. Maintenance Chemical Tanks – Overpressure alarms in small, flammable chemical storage.

35. Solar Thermal Plants – Heat transfer fluid (HTF) lines under high temperature/pressure.

36. Desalination Facilities – Overpressure in chemical lines near power generation.

37. Emergency Shutdown Systems – Pressure triggers to isolate hazardous lines.

38. Steam Turbine Extraction Lines – Overpressure detection to protect downstream equipment.

39. Gas Blower Systems – Monitoring blowers that handle flammable or explosive gases.

40. Pneumatic Ash Conveying – Dust-laden environment requiring explosion-proof sensors.

5. FOOD & BEVERAGE

1. Grain Silos – Dust-laden environment with high explosion risk.

2. Milling/Grinding – Overpressure detection in dust collectors (flour or grain dust).

3. Distilleries – Monitoring ethanol vapor line pressure.

4. Breweries – CO₂ line pressure for fermentation tanks.

5. Sugar Refineries – Explosion-proof sensors in dust-laden sugar processes.

6. Spray Drying (Milk Powder, etc.) – Overpressure with fine, combustible powder.

7. Vegetable Oil Extraction – Monitoring hexane or other flammable solvents.

8. Baking Facilities – Flour dust environment in mixers or handling systems.

9. Meat Processing – Overpressure in ammonia refrigeration lines.

10. Carbonated Soft Drinks – CO₂ injection line pressure.

11. Chocolate Production – Cocoa dust environment requiring explosion-proof detection.

12. Flavor Extract Manufacturing – Solvent-based extraction (ethanol, etc.).

13. Vinegar Fermentation – Overpressure from microbial CO₂ production.

14. Cheese Aging Rooms – Monitoring flammable cleaning agents under pressure.

15. Juice Concentration – Overpressure alarms in evaporators.

16. Snack Food Frying – Monitoring hot oil line pressure.

17. Candy Manufacturing – Sugar cooking under pressure with steam or flammable gas.

18. Yeast Production – Overpressure from high CO₂ fermentation.

19. Alcoholic Beverage Storage – Overpressure detection in large tanks.

20. Bioethanol from Food Waste – Monitoring fermentation system.

21. Bottling Lines – CIP line pressure for cleaning and sterilization.

22. Grain Drying – Explosion-proof fans in dusty environments.

23. Malt Processing – Overpressure detection in dust-laden environment.

24. Distillery Spent Grains Handling – Overpressure in vapor lines.

25. Spices & Powder Packaging – Dust-laden environment with ignition risk.

26. Coffee Roasting – Combustible dust and roasting gas lines.

27. Coffee Extraction (Instant Coffee) – High-pressure extraction with flammable solvents.

28. Soft Drink Syrup Production – Overpressure detection in concentrated sugar lines.

29. Dairy Pasteurization – Overpressure in steam lines.

30. Ice Cream Production – Ammonia refrigeration lines in freezers.

31. Frozen Food Processing – Explosion-proof lines for cryogenic refrigerants (e.g., liquid nitrogen).

32. Edible Oil Hydrogenation – Overpressure in hydrogen feed.

33. Water Bottling (Sparkling) – CO₂ line overpressure.

34. Wine Fermentation – Monitoring fermenter pressure from CO₂ buildup.

35. Tonic Water Production – Pressurized CO₂ environment.

36. Meat Rendering – Overpressure in cooking vessels.

37. Solvent-Based Flavor Creation – Overpressure in mixing or reactor vessels.

38. Fruit Juice Evaporation – Monitoring flammable or explosive vapors.

39. CIP with Caustic Solutions – Overpressure alarms in chemical lines.

40. Baghouse Dust Collection – Explosion-proof pressure monitoring in dusty conveyor lines.

6. MINING & METALS

1. Methane Detection in Coal Mines – Overpressure alarms for explosive gas pockets.

2. Underground Ventilation Fans – Explosion-proof monitoring in potential gas/dust environment.

3. Hydraulic Fracturing in Mines – Monitoring overpressure in fluid injection lines.

4. Smelting Off-Gas – Overpressure detection in high-temperature, flammable or toxic off-gases.

5. Ore Processing Dust Collectors – Explosion-proof sensors for combustible dust.

6. Concentrator Flotation Cells – Overpressure in pressurized air lines.

7. Cyanide Leaching Tanks – Monitoring enclosed spaces for HCN gas.

8. Precious Metal Refineries – Overpressure detection in retort systems.

9. Metal Powder Production – Dust-laden environment (e.g., aluminum, titanium powders).

10. Furnace Fuel Lines – Overpressure in natural gas or oil lines for melting.

11. Coke Ovens – Flammable coke oven gas overpressure alarms.

12. Hot Rolling Mills – Explosion-proof detection in hydraulic lines with flammable fluids.

13. Reverb Furnaces – Monitoring off-gas pressure.

14. Induction Furnaces – Overpressure detection in coolant or inert gas lines.

15. Arc Furnaces – Pressurized water-cooled panels or off-gas lines.

16. Molten Metal Handling – Argon blanketing overpressure alarms.

17. Sinter Plants – Combustible dust environment (fine iron ore, coke breeze).

18. Pelletizing Plants – Overpressure in drying or hearth layers.

19. Autoclaves for Metallurgy – High-pressure acid leaching (e.g., for gold, nickel).

20. Nickel Refining – Hydrogen reduction vessel overpressure.

21. Aluminum Smelting – Overpressure in potline fume collection.

22. Zinc Electrowinning – Monitoring tank house hydrogen gas risk.

23. Titanium Sponge Production – Mg or Na reduction in sealed vessels.

24. Casting Gas Purging – Argon or nitrogen line overpressure.

25. Ferroalloy Production – Furnace off-gas pressure monitoring.

26. Alloying Furnaces – Overpressure detection in vacuum induction melting.

27. Aluminum Rolling – Explosion-proof for oil mist environment.

28. Powder Metallurgy Plants – Dust collection lines.

29. Recycling Facilities – Shredder dust overpressure detection (e.g., auto shred).

30. Gas-Based Iron Reduction (DRI) – Overpressure in Midrex or HYL process lines.

31. Foundry Sand Handling – Dust-laden environment in sand hoppers.

32. Hot Metal Desulfurization – Overpressure detection in injection lines.

33. Slag Granulation – Overpressure from steam generation.

34. Vacuum Degassing – Overpressure detection in molten steel vacuum lines.

35. Scrap Preheating – Dust-laden environment with flammable off-gas.

36. Iron Pellet Transport – Pneumatic lines for pellet conveyance.

37. Coal Gasification – Syngas lines under high pressure.

38. Steel Rolling Hydraulic Systems – Explosion-proof switch in case of fluid leaks near hot surfaces.

39. Smelter Gas Cleaning – Overpressure detection in ESPs or baghouses.

40. Mineral Dryer Drums – Overpressure in dust-laden rotary dryers.

7. WATER & WASTEWATER

1. Anaerobic Digesters – Methane gas overpressure in sludge digestion.

2. Biogas Generators – Explosion-proof switch for combined heat and power (CHP).

3. Sewer Lift Stations – Flammable sewer gases require sealed, explosion-proof switches.

4. Chlorination Systems – Overpressure in chlorine gas feed lines.

5. Ozone Treatment – Monitoring pressurized ozone generation lines.

6. Sludge Dewatering – Overpressure alarms in enclosed centrifuges/presses.

7. Chemical Dosing Skids – Caustic or acid lines under pressure in enclosed areas.

8. Aeration Basins – Monitoring blower pressure in oxygen-rich environment.

9. Odor Control Scrubbers – Overpressure in H₂S gas lines.

10. UV Disinfection – Overpressure detection in hydrogen peroxide dosing lines.

11. Membrane Bioreactors (MBR) – Pressurized filtration modules.

12. Reverse Osmosis – High-pressure pump discharge in brackish or seawater RO.

13. Storm Water Retention Tanks – Overpressure from rapid filling of large volumes.

14. Fine Screening – Explosion-proof environment for enclosed screenings.

15. Grit Removal Tanks – Overpressure in sealed removal systems.

16. Phosphate Removal – Pressurized chemical feed lines for precipitation.

17. Nitrification/Denitrification – High oxygen feed lines.

18. Sludge Incineration – Overpressure in flue or off-gas lines.

19. Activated Carbon Filters – Overpressure detection for backwash cycles.

20. Ion Exchange Columns – Overpressure from water or chemical regenerants.

21. Landfill Leachate Treatment – Biogas lines with methane under pressure.

22. Industrial Pre-Treatment – Explosion-proof environment for flammable industrial waste streams.

23. Caustic/Acid Storage Tanks – Overpressure detection to prevent rupture.

24. SCADA Monitoring – Remote explosion-proof sensors in hazardous areas.

25. Pump Backwash Systems – Overpressure detection in cleaning cycles.

26. Effluent Polishing – Pressurized cloth or membrane filters.

27. Pressurized Sand Filters – Overpressure detection in enclosed filter vessels.

28. Chlorine Dioxide Generation – Overpressure in the chemical reaction chamber.

29. Pipe Galleries – Potential for flammable gas accumulation in enclosed corridors.

30. Reactor Clarifiers – Overpressure detection in sludge blanket clarifiers.

31. Sludge Thickening Tanks – Overpressure in covered tanks.

32. Inlet Works – Explosion-proof environment for hydrogen sulfide presence.

33. Aerobic Digesters – Overpressure from air blowers.

34. Post-Chlorination – Explosion-proof monitoring in chlorine injection lines.

35. Reclaimed Water Systems – Overpressure detection in pressurized distribution.

36. Pump Sumps – Explosion-proof sensors if flammable gases are present.

37. Gaseous Ammonia Feed – Monitoring feed line pressure for nitrification.

38. Biosolids Dryers – Dust-laden environment from dried sludge.

39. Sewage Gas Booster Pumps – Overpressure detection for methane-laden gas.

40. Wet Well Ventilation – Explosion-proof fans controlling sewer gases.

8. PULP & PAPER

1. Kraft Process Digesters – Overpressure detection in cooking vessel with sulfides.

2. Black Liquor Recovery Boilers – Furnace overpressure containing flammable black liquor.

3. Turpentine Recovery – Vapor line overpressure for this highly flammable byproduct.

4. White Liquor Clarifiers – Overpressure detection in caustic solutions.

5. Brownstock Washing – Explosion-proof environment where gases might accumulate.

6. Bleaching Towers – Overpressure from chlorine dioxide or hydrogen peroxide.

7. Pulp Refiner Lines – Pressure transients in mechanical refining.

8. Smelt Dissolving Tanks – Overpressure from steam generation when smelt contacts water.

9. Evaporators – Flammable vapors from black liquor concentration.

10. Paper Machine Headbox – Sealed pressurized environment feeding pulp slurry.

11. Deaeration Tanks – Overpressure detection in warm, oxygenated liquids.

12. Lime Kiln – Off-gas pressure containing flammable components.

13. Chip Bin Steam Injection – Overpressure detection in steaming vessels.

14. Oxygen Delignification – Monitoring overpressure in oxygen reaction towers.

15. Causticizing Tanks – Overpressure detection in reaction with lime.

16. Recovery Boiler ESP – Electrostatic precipitator in a dust-laden environment.

17. Tall Oil Recovery – Overpressure detection for resin/soap extraction.

18. Odor Control Systems – Monitoring TRS (total reduced sulfur) gas lines.

19. Sludge Handling – Overpressure in thickening or dewatering processes.

20. Pulp Bleach Filtrates – Pressurized lines carrying chlorinated solutions.

21. Chemical Additive Storage – Explosion-proof sensors in flammable chemical tanks.

22. Wet-End Chemical Dosing – Overpressure detection for defoamers, retention aids.

23. Paper Coating Kitchen – Starch or latex-based coatings under pressure.

24. Recausticizing – Overpressure in green liquor clarifiers.

25. Stock Preparation – Dust-laden environment if dry pulp is handled.

26. Paper Machine Steam Boxes – Steam pressure monitoring.

27. Vacuum Pumps – Overpressure in seal water lines in hazardous areas.

28. Chip Screening – Dust-laden environment from wood chips.

29. Blow Tank – High-pressure discharge of cooked pulp.

30. High-Density Storage Tanks – Overpressure detection in sealed tanks of thick pulp.

31. Turbine Generator for Mill – Explosion-proof hydrogen lines if used for cooling.

32. Chlorate Plants for Bleach – Overpressure detection in chemical reaction vessels.

33. Lignin Recovery – Overpressure in solvent-based extraction processes.

34. Debarking Drums – Dust-laden environment from bark removal.

35. Mechanical Pulping Lines – High-pressure refining or grinding.

36. Recovery Boiler Sootblowers – Steam line overpressure detection.

37. Green Liquor Clarifiers – Overpressure alarms in sulfide-rich environment.

38. Slaker Tanks – Highly exothermic reaction overpressure.

39. Tissue Machine Dust Collection – Explosion-proof environment for fine paper dust.

40. White Water System – Overpressure detection in sealed water loops.

9. PAINTS, COATINGS & SOLVENTS

1. Paint Mixing Rooms – Overpressure detection in volatile solvent environments.

2. Spray Booths – Explosion-proof monitors in exhaust plenums.

3. Solvent Transfer Pumps – Controlling flammable solvent line pressure.

4. Lacquer Production – Overpressure alarms for high-VOC solutions.

5. Epoxy Resin Blending – Monitoring reaction vessel pressure for exotherms.

6. Polyurethane Coatings – Isocyanate line overpressure detection.

7. Aerosol Filling Lines – Propellant (e.g., propane/butane) line pressure.

8. Ink Manufacturing – Solvent-based ink mixing under pressure.

9. Paint Storage Tanks – Overpressure detection in flammable liquid storage.

10. Resin Reactor Vessels – Monitoring flammable monomer feed lines.

11. Pigment Grinding Mills – Dust-laden environment with potential for ignition.

12. Solvent Recovery Units – Vapor line overpressure detection.

13. Curing Ovens – Monitoring flammable volatile emissions.

14. Powder Coating Booths – Combustible dust-laden air.

15. Hardener/Activator Lines – Overpressure in separate chemical feed lines.

16. Chemical Strippers – Overpressure in flammable solvent-based solutions.

17. Adhesive Manufacturing – Overpressure in polymer or solvent feed.

18. Varnish Production – Overpressure detection in resin and solvent blend tanks.

19. Gel Coat Application – Monitoring styrene line pressure in fiberglass shops.

20. Paint Can Filling – Explosion-proof environment for packaging flammable liquids.

21. Solvent Reclamation Distillation – Overpressure detection during boiling.

22. Printing Ink Transfer – Explosion-proof pumps for flammable inks.

23. Batch Reactors – Overpressure detection in flammable monomer reactions.

24. Electrostatic Spray Coating – Air/gas line overpressure to guns.

25. Lacquer Thinner Manufacturing – Overpressure in blending lines with various solvents.

26. Automotive Paint Shops – Explosion-proof sensors on paint supply lines.

27. Marine Coatings – Overpressure detection in anti-fouling paint lines.

28. High-Solids Coatings – Monitoring line pressure for thick, flammable coatings.

29. Anti-Corrosion Coatings – Overpressure in zinc-rich or solvent-based lines.

30. Stain and Dye Mixing – Overpressure detection in organic solvent lines.

31. Powder Paint Storage Silos – Dust-laden environment requiring explosion-proofing.

32. Aerosol Propellant Tanks – Monitoring overpressure where butane/propane is stored.

33. UV-Cured Coatings – Potentially flammable monomer lines.

34. Fireproofing Coatings – Solvent-based intumescent materials under pressure.

35. Plasticizer Mixing – Overpressure alarms in phthalate or phosphate ester lines.

36. Wet Scrubbers for VOCs – Overpressure detection in exhaust streams.

37. Box Ovens for Painted Parts – Monitoring buildup of volatile fumes.

38. Heated Mixing Vessels – Vapor overpressure from high-temperature flammable mixtures.

39. Pressurized Solvent Delivery – Overpressure alarms to prevent line rupture.

40. Paint Sludge Dehydration – Overpressure in flammable waste sludge handling.

10. GENERAL MANUFACTURING & INDUSTRIAL PROCESSING

1. Automotive Assembly – Explosion-proof paint lines and robotic spray booths.

2. Aerospace Fuel Tank Testing – Overpressure detection in rocket fuel or test stands.

3. Battery Manufacturing – Volatile electrolyte line pressure (e.g., Li-ion).

4. Semiconductor Fabs – Silane/hydrogen feed line overpressure in epitaxy tools.

5. Glass Manufacturing – Natural gas or oil furnace lines under pressure.

6. Cement Plants – Dust-laden environment near pulverizers and baghouses.

7. Plastic Injection Molding – Hydraulic or pneumatic lines with flammable fluid.

8. Rubber Vulcanization – Steam or nitrogen pressurization in curing presses.

9. Textile Dyeing – Pressurized lines for dyes and chemicals (some flammable).

10. Leather Tanning – Overpressure detection in flammable chemical feed lines.

11. Furniture Manufacturing – Overpressure in finishing lines (lacquers, varnishes).

12. Carbon Fiber Curing – Autoclave overpressure monitoring with flammable resins.

13. Electronics Assembly – Overpressure in conformal coating lines.

14. HVAC Equipment Manufacturing – Flammable refrigerant lines (e.g., R290, hydrocarbons).

15. Tool & Die Cooling – Flammable coolants under pressure near hot machinery.

16. Inkjet Cartridge Filling – Overpressure detection with flammable solvents.

17. 3D Printing – Explosion-proof measures for metal or polymer powder handling.

18. Composite Materials – Resin infusion systems under vacuum/pressure.

19. Pharmaceutical Machinery Fabrication – Test stands for flammable CIP solutions.

20. Packaging Industry – Overpressure in hot melt adhesive lines.

21. Battery Recycling – Volatile off-gases from battery breakdown.

22. Explosives Manufacturing – Overpressure detection in propellant mixing.

23. Fireworks Production – Dust-laden environment with pyrotechnic compounds.

24. PCB Manufacturing – Flammable solvents or etchants in enclosed lines.

25. Synthetic Fiber Production – High-pressure polymer extruders for nylon or polyester.

26. Electric Motor Manufacturing – Varnish impregnation under vacuum/pressure.

27. Pressure Vessel Fabrication – Overpressure test stands in factory acceptance tests.

28. Automotive Parts Painting – Overpressure detection in e-coat or paint lines.

29. Laser Cutting – Flammable assist gases (e.g., hydrogen) under pressure.

30. Heat Treatment Furnaces – Nitrogen, endothermic, or exothermic gas lines.

31. PCB Cleaning Lines – Overpressure detection in solvent-based cleaners.

32. Anodizing Aluminum – Pressurized chemical lines with acid-based electrolytes.

33. Magnetic Tape Production – Solvent-based coating lines.

34. Packaging Printing – Overpressure alarms in solvent-based inks.

35. Lithium Battery Testing Labs – Overpressure detection for flammable electrolyte fumes.

36. Photovoltaic Cell Production – Overpressure in doping or chemical vapor deposition lines.

37. Insulation Material Manufacturing – Binder or resin lines in a flammable environment.

38. Tire Manufacturing – Overpressure in rubber mixing or curing lines.

39. Warehouse Storage of Flammables – Explosion-proof pressure switches near drum pumps.

40. Airbag Propellant Manufacturing – Overpressure detection in sealed propellant lines.

Benefits of Bellville Disc Springs in Pressure Switches

Belleville disc springs, named after their inventor, Julien Belleville, are conical-shaped washers that provide a type of spring mechanism. When used in pressure switches, Belleville disc springs offer several advantages due to their unique properties and design making them suitable for a wide range of applications, from industrial machinery to safety equipment, and a preferred choice in applications where reliability, precision, and durability are critical.

High Load Capacity in a Compact Size
Belleville disc springs can support high loads with relatively small deflections compared to other spring types. This high load capacity in a compact form factor is advantageous in pressure switches where space may be limited.

Adjustable Operating Force
By using Belleville springs with application-specific properties, the operating force and deflection characteristics of the pressure switch can be finely tuned. This flexibility allows for precise control over the actuation point of the switch.

Long Service Life
The resilience and durability of Belleville disc springs contribute to a long service life, even in applications with high cycling rates. This durability ensures that pressure switches maintain their accuracy and reliability over time.

Wide Range of Operating Temperatures
Belleville disc springs perform reliably over a wide range of temperatures, making them suitable for applications exposed to extreme heat or cold.

Tolerance to Impurities
Belleville disc springs can tolerate some degree of impurities and deformation without significant loss of functionality. This characteristic is beneficial in environments where the pressure switch might be exposed to contaminants.

Shock and Vibration Resistance
The inherent design of Belleville disc springs provides excellent resistance to shock and vibration. This makes Belleville disc spring-based pressure switches highly reliable in dynamic and challenging environments, such as in compressors, chemical, petrochemical, and heavy machinery applications.

Minimal Maintenance
The simple and robust design of Belleville disc springs requires minimal maintenance. This reduces the overall cost of ownership and increases the reliability of the pressure switch.

Quick Response Time
Belleville disc springs can react quickly to changes in pressure, ensuring that the pressure switch responds promptly to operating conditions. This rapid response is critical in applications where safety or system performance is dependent on timely pressure regulation.

Predictable Behavior
The mechanical properties and behavior of Belleville disc springs under load are predictable, which facilitates trusted design, operation, and calibration of pressure switches.

CCS Dual-Snap 6900GZE Series
The Custom Control Sensors Dual-Snap hazardous locations 6900GZE series of mechanical gage pressure switch with a stainless steel port for corrosion-resistance are the most popular and renowned for being highly predictable, highly dependable, and long lasting, due to their time-tested quality design. 

The 6900GZE series is UL/CSA explosion-proof, Class I, Groups A, B, C and D, and Class II Groups E, F and G certified. NEMA 4X and IP66 rating is ideal for wet conditions.

The 6900GZE series is designed with high vibration and shock resistance utilizing Dual Snap® disc spring technology ensuring high accuracy and repeatability. It comes with high over-pressure capabilities and a relatively compact size to conveniently mount on panels. It meets the demand for all applications commercial, industrial and otherwise.

Advantages of CCS Dual-Snap 6900GZE Series Pressure Switches