The Yamada LLC-2Y Liquid Level Controller is a totally
pneumatic system designed to automatically start and stop
Yamada Air-Powered Double Diaphragm Pumps when the
liquid level within a tank, sump, etc. reaches predetermined

An extremely versatile controller, the LLC-2Y can be used
in both single and dual pump applications with any size or
model Yamada pump. Used in a single pump confguration, it
automatically controls either the flling or emptying of a tank
or other vessel. When connected to two separate pumps, it
will control both the flling and emptying of the tank. This dual
pump capability is particularly useful for waste water storage,
contaminated water clean up, and other applications where
liquids are regularly transferred into and out of a single vessel.

The LLC-2Y consists of a sophisticated air logic control valve
housed in an impact-resistant fberglass reinforced plastic
enclosure. As the liquid level within the tank rises or falls, the
subtle changes in pressure are transmitted through high and
low level dip tubes to the air logic control valve. When the liquid
level reaches a predetermined level (tubing is cut in the feld
to the preferred HIGH and LOW level points), the power valve
supplying air pressure to the pump is turned ON or OFF as

The LLC-2Y is capable of maintaining liquid levels in virtually
any unpressurized vessel. Its liquid level control span ranges
from a few inches to dozens of feet. For added convenience, it
may be mounted up to 6 meter away from the pump.

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