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Series 401 Top Mount Float Type Level Control
Single or Two Stage for Pump or Alarm, Depth to 12', Specific Gravity to 0.50
These heavy duty top-mounted liquid level controls operate in pressurized or non-pressurized tanks and sumps with pressures to 600 psi and temperatures to 500°F. They can be ordered to operate at depths to 12 feet with a 12 foot guide rod. Adjustable in single stage and two stage operation to provide action such as operating a pump; pump and high alarm or shutdown; pump and low alarm, or high and low alarm; or high, high alarm; or low, low alarm. Alarm functions can also be used as shutdowns. Series 401 is available in mercury or snap action contact switches. Specific gravity applications from 0.5 to 1.0.
Product Applications
- Oil Refineries
- Chemical Plants
- Power Generating Stations
- Pumping Stations
- Sanitary/Waste Water Facilities
- Tanks and Vessels
Specifications
- Minimum Specific Gravity:
- See Dimensional Drawing.
- Temperature Limit:
- Ambient Temperature: 212°F (100°C); Process Temperature: -20 to 500°F (-29 to 260°C) See chart.
- Temperature Rating:
- -0°F (-9°C) to 500°F (260°C).
- Switch Type:
- Snap action or mercury.
- Electrical Rating:
- See model chart on catalog page.
- Wiring Connections:
- G, WT or E enclosure, terminal block. EV enclosure, 18" (460 mm) leads.
- Process Connection:
- Top mount flange.
- Enclosures:
- G, painted steel and aluminum; WT, painted steel, aluminum and neoprene; E, aluminum; EV, aluminum and neoprene.
- Wetted Parts:
- See Dimensional Drawing and Model Chart.
- Weights:
- Electrical head and float assembly only: G, WT 10 lb (4.5 kg); E, EV 14 lb (6.3 kg). Flange only: 49, 17 lb (7.7 kg); 59, 20 lb (9 kg); 69, 27 lb (12.3 kg); 89, 47 lb (21.3 kg). Guide rods assembly: 4 ft (1.2 m), 14 lb (6.4 kg); 8 ft (2.4 m), 28 lb (12.7 kg); 12 ft (3.6 m), 42 lb (19 kg). Suggested Specifications:
Liquid level control shall be top flange mounted, float operated, with (Brass)(Stainless Steel) guide rod assembly for operation to (4)(8)(12) foot depth. Float and flange shall be sized for intended specific gravity. Operation shall be 401-1 (pump), 401-2 (pump and high alarm), 401-3 (pump and low alarm), 401-4 (high and low alarm), Circuit shall be (SPST) (SPDT) (DPDT) hermetically sealed snap action (mercury) switch. Switch mechanism shall be gravity return. Enclosure shall be general purpose (weatherproof) (explosion-proof) (explosion-proof - vapor proof).
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