Heavy duty and low cost is the perfect description for the 391 Series level control. Stainless steel switching mechanism uses gravity return action instead of springs for long life. Weather proof enclosure standard. Welded steel chamber is good for 650 psig (45 bar) at 600oF (315oC)
Applications
Oil refineries, chemical plants, power generating stations, pumping stations, heat transfer systems, sanitary / waste water facilities, drip legs, hydraulic systems, boilers |

Compact, Low Cost
Hermetically Sealed
Snap Switch Option
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Service
Compatible liquids
Enclosure Rating
NEMA 4X
Optional general purpose or explosion-proof
Weight
10 lb (4.5 kg)
Mounting Orientation
Vertical
Agency Approvals
UL |
Electrical Connections
Screw terminal
Switch Type
SPDT snap switch, hermetically sealed snap switch, or mercury switch.
Optional DPDT
Specific Gravity
0.8 minimum. Optional 0.7 minimum.
Conduit Connections
¾" female NPT
Process Connections
1" female NPT
Optional 1" socket weld hub or flange connections
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