Item # SL-3, Limit Switches On Century Instrument Co.

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	Item # SL-3, Limit Switches

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SL-3 switch is NEMA-4 water-proof National Acme snap-lock switch in die-cast aluminum housing. SL-3 is DPDT rated at 20 amps at 125 vac, 10 amps at 480 vac, 5 amps at 125 vdc, 1.5 amps at 250 vdc.

For Dimension B₃ consult the factory.

Specifications · Limit Switch Settings

Specifications

Manufacturing Standard		NEMA-4

Switch Type		DPDT

Housing Material		Die-Cast Aluminum

Limit Switch Settings

At time of shipment from the factory, the limit switches are set to give a signal at full valve open and closed positions. On "rate-set" valves, that is valves on which the limit stops are set to limit the valve opening so as to regulate flow, the resetting of the "valve open" switch is extremely simple.

After the limited valve open positions has been established, it is simply necessary to loosen the lock-nut on the switch actuator arm - move the adjusting screw upward until the upper switch trips, then re-tighten the lock-nut.

Item # SL-3, Limit Switches

Manufacturing Standard

Switch Type

Housing Material