Flanged external cage liquid level switches

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Flanged external cage liquid level switches

Flanged external cage type level switches are completely self-contained units designed for side mounting to a tank or vessel with threaded, socket weld or flanged pipe connections. In hundreds of industrial applications throughout the petroleum refining, petrochemical production and power generation markets, these switches have demonstrated their worth through reliable and repeatable service.

External cage switches

Technology

A permanent magnet is attached to a pivoted switch actuator. As the float/displacer rises following the liquid level, it raises the attraction sleeve into the field of the magnet, which then snaps against the non-magnetic enclosing tube, actuating the switch. The enclosing tube provides a static pressure boundary between the switch mechanism and the process. On a falling level, the float/displacer deactivates the switch.

  • Carbon steel float chambers
  • Stainless steel float and trim
  • Service pressures up to 900 psig (62 bar)
  • Process temperatures to +1000 °F (+540 °C)
  • Specific gravity ratings as low as 0.34
  • Chamber internals accessible via flange top
  • Single or multiple switch mechanisms
  • 1″, 1½”, or 2″ tank connections available in either NPT, socket weld, flanged side/side or flanged side/bottom construction

Options

  • Dry contact, hermetically sealed and pneumatic switch mechanisms
  • Choice of switch enclosure
  • Interface level
  • Custom materials of construction available upon request
  • Customized levels and mounting dimensions
  • Vent and drain connections
  • High temperature insulation
  • Extreme temperature modifications
Chemical
  • Catalysis vessels
  • Chemical reactors
  • Deionization tanks
  • Heat Recovery Steam Generator (HRSG) – Power/Utilities
  • Neutralization
  • Scrubber vessels
  • Surge drums
Common applications
  • Level: Lubrication oils & hydraulic fluids
  • Level: Process & field storage tanks
Crude oil
  • Crude desalting
  • Process & Field storage tanks
  • Production Fluid Storage
  • Wellstream separation
Natural gas
  • Flare Knock-out Drum
  • Gas Dehydration
Nuclear power
  • Containment & drainage sumps
  • Emergency coolant tanks
  • Liquid waste storage
  • Scram discharge volume tanks
  • Spent fuel pools
Petroleum refining
  • Catalysis vessels
  • Crude desalting
Power generation
  • Boiler blowdown tanks
  • Condensate drip legs
  • Condensate receiver tanks
  • Condensate storage
  • Deionization tanks
  • Flash tanks
  • Heat Recovery Steam Generator (HRSG) – Power/Utilities
  • Preflash drums
Pulp & paper
  • Black, green & white liquor
  • Condensate receiver tanks

The buoyancy force of a process liquid on the float causes the float to ride on the liquid surface. The movement of the float with the liquid level moves an attraction sleeve into the field of the switch magnet, pulling the magnet toward the sleeve and actuating the switch.

ATEX Ex d, Ex ia
CCOE Ex d
CSA XP
FM XP
EAC (GOST) Ex d, Ex ia
IEC Ex d, Ex ia
Inmetro Ex d
Korea Ex d
NEPSI Ex d
SIL SIL 2 (1oo1)

Other approvals are available.

+ Features
  • Carbon steel float chambers
  • Stainless steel float and trim
  • Service pressures up to 900 psig (62 bar)
  • Process temperatures to +1000 °F (+540 °C)
  • Specific gravity ratings as low as 0.34
  • Chamber internals accessible via flange top
  • Single or multiple switch mechanisms
  • 1″, 1½”, or 2″ tank connections available in either NPT, socket weld, flanged side/side or flanged side/bottom construction

Options

  • Dry contact, hermetically sealed and pneumatic switch mechanisms
  • Choice of switch enclosure
  • Interface level
  • Custom materials of construction available upon request
  • Customized levels and mounting dimensions
  • Vent and drain connections
  • High temperature insulation
  • Extreme temperature modifications
+ Applications
Chemical
  • Catalysis vessels
  • Chemical reactors
  • Deionization tanks
  • Heat Recovery Steam Generator (HRSG) – Power/Utilities
  • Neutralization
  • Scrubber vessels
  • Surge drums
Common applications
  • Level: Lubrication oils & hydraulic fluids
  • Level: Process & field storage tanks
Crude oil
  • Crude desalting
  • Process & Field storage tanks
  • Production Fluid Storage
  • Wellstream separation
Natural gas
  • Flare Knock-out Drum
  • Gas Dehydration
Nuclear power
  • Containment & drainage sumps
  • Emergency coolant tanks
  • Liquid waste storage
  • Scram discharge volume tanks
  • Spent fuel pools
Petroleum refining
  • Catalysis vessels
  • Crude desalting
Power generation
  • Boiler blowdown tanks
  • Condensate drip legs
  • Condensate receiver tanks
  • Condensate storage
  • Deionization tanks
  • Flash tanks
  • Heat Recovery Steam Generator (HRSG) – Power/Utilities
  • Preflash drums
Pulp & paper
  • Black, green & white liquor
  • Condensate receiver tanks
+ Operating principle

The buoyancy force of a process liquid on the float causes the float to ride on the liquid surface. The movement of the float with the liquid level moves an attraction sleeve into the field of the switch magnet, pulling the magnet toward the sleeve and actuating the switch.

+ Approvals
ATEX Ex d, Ex ia
CCOE Ex d
CSA XP
FM XP
EAC (GOST) Ex d, Ex ia
IEC Ex d, Ex ia
Inmetro Ex d
Korea Ex d
NEPSI Ex d
SIL SIL 2 (1oo1)

Other approvals are available.

JOLAC ENGINEERING SDN BHD (“JOLAC”) was incorporated as private limited company in Kuala Lumpur, Malaysia under the Companies Act 1965 on 16th December 1982.