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Rugged. Adaptable. Compact.

Refrigerant Float Switch

The Hansen Refrigerant Float Switch (HLL series) is used to electrically indicate or control a liquid level by opening or closing a single pole, double throw (SPDT) switch. Its simple, reliable design provides long life performance for almost any application.

To overcome the most common reason for existing float switch failure-switch burnout-a heavy-duty 10 amp snap action Honeywell Micro Switch® is used. This switch is sealed in a clear housing to allow visual confirmation of switch action but protection from tampering. In addition, the switch is surrounded by an inert gas that provides an environment which inhibits corrosion. An optional switch housing heater prevents moisture penetration in humid environments. These float switches have a rugged steel tank assembly and a high-strength, large diameter ball stem to eliminate potential stem bending or breakage. Hansen Refrigerant Float Switches are interchangeable with R/S LL series float switches.

Advantages

Innovative features make these float switches the superior selection. To overcome the most common reason for existing float switch failure, switch burnout, a heavy duty 10 amp snap action Honeywell SPDT Micro Switch ® is used. This switch is sealed in a clear housing to allow visual confirmation of switch action but protection from tampering. In addition, the switch is surrounded by an inert gas which provides an environment which inhibits corrosion. For ease of installation, switch assembly position rotates 360°. If
the switch assembly should ever need to be replaced, simply loosen the retaining screw and lift the lfoat switch assembly off the top of the tank assembly. Optional switch housing heater prevents moisture penetration in humid environments.

Tank assembly is rugged, steel bodied with unique combination ¾” FPT / 1″ Butt Weld connections. Inside, a high pressure tested float ball moves up and down via a large diameter stem, overcoming potential bending or breakage. Its movement is accurately guided by the attractor and an alignment guide. Therefore, the float ball assembly is not subject to the common, adverse effects of normal oil and sludge build-up on the tank interior walls. A deflector plate across the inlet of the tank assembly protects the float ball against sudden surges and provides smoother operation. In addition, lower and upper cushioning springs provide improved protection for the float ball. A standard 2″ (50 mm) differential prevents most short cycling due to momentary changes in liquid level; other differentials down to 0.5″ (13 mm) are available. Because the tank assembly is welded, it eliminates gasket leak potential as well as tampering.

MATERIAL SPECIFICATIONS

Operating Temperature:
-50ºF to +150ºF (-45°C to +65°C)
-20ºF to +150ºF for CO2 (-29°C to +65°C)
(Lower temperatures possible at pressure down rating for CO2)<

Safe Working Pressure: 400 psig (27 bar), 600 psig (40 bar) for CO2
Connections: ¾" FPT / 1" Butt Weld combination
Specific Gravity: 0.57 to 1.70
Electrical Switch: 120V, 240V, 10 amp SPDT
Connection: ½" NPSM for conduit, optional DIN plug (3 wire plus ground)