Liquid Level Controllers For Pumps
Yamada offers a series of easy to install Liquid Level Controllers, each designed to sense and control the level of fluid at fixed and adjustable set-points. Once the controller maintains the predetermined level, a signal automatically switches the pump on or off based on the value around the set-points.
YALC
LLC - 2Y
LLC - 3 Sump Pump
YALC Level Controller
Compatible with all Yamada pumps.
Literature | Installation/Operation | BOM | Manual
LLC-2Y Level Controller
Compatible with all Yamada pumps.
LLC-3 Sump Pump Level Controller
This is a traditional “float type” system designed for a 5 gallon pail or sump of equal depth. The pump is controlled by an internal float which actuates an air valve. As the liquid level in the sump rises, the pump automatically starts and operates until the liquid level drops below a predetermined level. The LLC-3 sump system cover comes complete with a diaphragm pump from the list below, float assembly (actuator and float ball with stem), filter-regulator gauge assembly, and suction pipe. All components are mounted on a 5 gallon lid and bucket.
LLC-3 Diaphragm Pump Series and Elastomers Available:
- NDP-5 (1/4”)
- DP-10 (3/8”)
- NDP-15 (1/2”)
- Buna N
- Hytrel
- Neoprene
- Santoprene
- PTFE
Features:
- Pneumatic Operation – No electricity required
- Energy Efficient – Pnuematic operation
- On/Off Reliability – Automatically starts and stops at predetermined levels
- Versatile – Single pump operation: controls fill or evacuation levels;
- Dual pump operation: controls both evacuation and fill levels simultaneously
- Compact – space saving design controls pumps up to 20 ft. distance
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Our Pumps
What is a Double Diaphragm Pump How it works in an industrial application?
Air-operated double diaphragm (AODD) pumps utilize a 1:1 positive displacement mechanism powered by compressed air to accurately transfer a known volume of liquid from one point to another. This versatile pump technology is well-suited for a wide range of industrial and commercial applications due to the broad selection of available materials and reliable operating performance.
Ideal for handling high solids content, viscous fluids, extreme pH ranges, and dry running scenarios, AODD pumps also accommodate variable flow rates and suction lift requirements. Their inherently safe, explosion-proof design makes them an excellent choice in hazardous environments or where portability is essential.
With flow capacities ranging from 0.5 to 250 GPM and operation dependent solely on compressed air, air-operated diaphragm pumps offer a dependable and efficient solution for transferring nearly any liquid with minimal maintenance and maximum adaptability.
How does an air-operated double diaphragm pump work?
An air-operated double diaphragm pump is a pneumatic pump that uses a patented air valve. That air valve directs compressed air to either side of the pump, back and forth. As it does, it can run on regular compressed air, clean dry air, nitrogen, or even natural gas. While this switch is happening, the valve pushes compressed air behind a diaphragm. In turn, this directly applies the force to the liquid in the chamber and forces it up and out of the pump. The force that pushes one diaphragm out also pulls the other diaphragm in, as they are attached to a common center shaft. This action creates a vacuum in the opposite liquid chamber. Then, when one side is evacuating the liquid, the other side is filling up. The two sides alternating creates a flow rate, ensuring the transfer of liquids.
While one side of the pump is evacuating liquid, the other side is filling up. This process goes back and forth to create the actual liquid transfer and the subsequent flow rate required. There are four ball check valves inside a standard pump which allow the liquid to travel from the bottom suction manifold to the top discharge manifold. With this technology, you can run anywhere from a few psi or air pressure all the way up to 125 psi of pressure, depending on the flow rate and the discharge pressure required.
While the Yamada NDP pump series is widely recognized as the industry standard for air-operated double diaphragm (AODD) pumps, its versatility extends far beyond conventional applications. These pumps are also well-suited for handling more specialized and demanding media such as ultra-high purity chemicals, pharmaceuticals, alcoholic beverages, food-grade products, and fluids with higher viscosities or solid contents—up to 40% by weight. With minimal modifications, most NDP pump models can be customized to meet the specific requirements of these unique processes. Additionally, pneumatic operation makes these pumps ideal for transferring highly flammable or explosive liquids, as they are easily grounded and inherently safer due to their non-electrical, air-driven operation.