SERIES 3 ASME B31.1, ASME B31.3 AND NACE EXTERNAL CAGED LEVEL SWITCH


ASME B31.1 Construction

Series 3 ASME B31.1 float-actuated level switches are designed, built, and certified to the requirements of ASME B31.1 power piping codes. They are ideal for critical alarm set points in clean liquid applications.

ASME B31.3 Construction

Series 3 ASME B31.3 float and displacer-actuated level switches are designed, built, and certified to the requirements of ASME B31.3 power piping code requirements. They are ideal for critical alarm set points in clean liquid applications.

NACE Construction

Series 3 NACE float and displacer-actuated level switches are designed, built and certified to meet NACE MRO175 and MRO103 requirements. They are ideal for alarm and control set points in sour liquid applications. All welding is performed by qualified welders and per procedures required by the ASME Boiler Pressure Vessel Code Sec. IX. Carbon steel pressure boundary parts are post weld stress relieved. All welds and heat-affected zones are hardness tested to ensure compliance with NACE maximum hardness requirements.

Operating Principle


The buoyancy force of a process liquid on the float or displacer causes it to move with the liquid level change. This movement positions an attraction sleeve in the field of the switch magnet, pulling the magnet toward the sleeve and actuating the switch.

Applications


Feedwater heaters
Condensate drip pots
Deaerators
Steam drums
Flash tanks
Hot wells
Gas/Oil separators
Knockout drums
Crude/salt water separators
Receivers
Flare pots
Accumulators

Features


Models built to ASME B31.1, ASME B31.3, and NACE MR0175/MR0103 construction
14-inch (356 mm) side/side process connections available as standard
Service pressures up to 2240 psig (154.4 bar)
Process temperatures up to +1000° F (+538° C)
Specific gravity ratings as low as 0.33
Choice of TYPE 4X/7/9, Group B, C & D or EEx d IIC T6 housings
Agency approvals include FM, CSA, ATEX and SAA
Choice of single or multiple switches for single or staged applications
Special materials of construction available upon request
Available with special coatings including Epoxy, Carbo Zinc® 11 Primer and Carboline Top Coat, Dimetcote® and Amercoat

Options


Threaded, socket weld or flanged process connections
Custom actuation levels
Custom installation dimensions
Optional high or low temperature insulation available
Choice of switch mechanism:
Dry contact
Hermetically sealed
Pneumatic
Choice of switch mechanism enclosure:
TYPE 4X/7/9 Class I, Div. 1, Groups B, C & D, polymer coated aluminum
NEMA 1, carbon steel for pneumatics
Choice of tank connection:
1", 1 1⁄2" or 2" NPT
1", 1 1⁄2" or 2" flanged side/side
1", 1 1⁄2" or 2" flanged side/bottom
1", 1 1⁄2" or 2" socket welds

APPROVALS


XP=Explosion Proof
IS=Intrinsically Safe
NI=Non-Incendive
NS=Non-Sparking
ELV=EMC/Low Voltage

Literature:


+ Product Catalog
+ Instruction & Operating Manual