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1975 Cooling Tower Products Rebuilding Specialists Since 1975 Menu and widgets Home About Services Videos Contact Search for: Recent Posts How Do Float Switches Work (Diagram & Working Principle) Cooling Tower Problems & Solutions Natural Drafting Cooling Towers Explained Cooling Tower Vibration Analysis | Vibration Cut-off Switch Categories cooling tower operation cooling towers Float Switches Uncategorized vibration switch How Do Float Switches Work (Diagram & Working Principle) If you are searching forfloat switch working principle ” orhow does a float switch work ” this post should help. Old Float Switch Working Principle New Float Switch Working Principle Single Point Float Switch Working Principle Multi-point Float Switch Working Principle How Old Float Switches Work Older Float Switches work by opening and closing circuits (dry contacts) as water levels rise and fall. Typical float switches are normally resting in the closed position, meaning the circuit is incomplete and no electricity is passing through the wires yet. Old Float Switch Working Principle Once the water level drops below a predetermined point, the circuit completes itself and sends electricity through the completed circuit to trigger an alarm. How does the electricity pass through the circuit? The electricity passes through, what are called, magnetic reed switches. Once the water does drop low enough, the reed switches come in contact with each other and complete the circuit, allowing electricity to be passed through them and turn on the alarm. Once the water gets high enough again, the switches break apart and disconnect the circuit. The Magnetic Reeds Open & Close To Control Water Levels The magnetic reeds are sealed in a stainless steel or plastic stem. The magnetized reed switches move and down as the water level increases and decreases and are set to come together and break apart at different heights that you specify during installation. The problem with the way these old float switches work is that they can deteriorate due to poor water quality and electricity passing through them. That’s why Water Level Controls created their own float switch replacement that uses sensing probes to gauge water levels instead of floats. Float Valves Other cooling tower operators typically used float valves instead of sensor rods for automatic control of water levels. Float valves use a floating mechanism and arm to gauge water levels and turn on and off pumps. These types of float switches could only do 1 or 2 operations unlike new float switches that can be programmed to handle many automatic operations. How New Float Switches Work Water Level Control’s float switches work by using probes instead of float switches.The sensor probes actually act as their own sensors and do not pass electricity through the probes which keeps them from fouling, degrading and deteriorating. Also, all of the electronics are built into the head so you can connect directly to your control panel. Once the water level is detected by one of the sensors, this causes one of six alarms to be triggered (High Alarm, Low Alarm, Fill Start, Fill Stop, etc). Depending on the type of float switch you have, there can be single point alarm or a multi point alarm that is triggered. ” How Do Float Switches Work Single Point & Multi Point Float Switches Single point and multipoint float switches allow you more control of your storage tank filling mechanisms and will last 5 times longer than traditional float switches. How Single Point Float Switches Work Single point float switches work with 3 sensor rods (Reference, Start & Stop) that work in conjunction to turn on and off your water pump automatically. This helps keep water levels at a consistent level. How Multi Point Float Switches Work In Multi-point float switches , there are 4-6 sensor rods (High alarm, fill 1 stop, fill 1 start, fill 1/fill 2 stop, fill 2 start, low alarm, reference). These rods can programmed to do multiple tasks such as stop water levels once they reach a predetermined point and start filling water once its drops below a certain level. The most basic way to explain this is; the sensor probes stick down in the water to detect water levels at different heights, depending on the height of the water, the probes all have different tasks they perform. If the water level is too low, it sets off the low water alarm, if the water is too high, it sets off the high level alarm etc. Buy Cooling Tower Float Valves Shop for Cooling Tower Float Valves at Cooling Tower Products. Posted on June 29, 2017 June 29, 2017 Author Cooling Tower Products Categories cooling tower operation , Float Switches Tags How Float Switches Work , How Water Level Controls Work , How Water Level Sensors Work Cooling Tower Problems & Solutions Are you searching forCooling Tower Problems & Solutions ” while looking for a way to fix your cooling tower issues? If so, this article should help! We have also included links for parts you might need to repair your cooling towers. This article is designed to help you figure out what is going on and understand the ways that cooling tower maintenance companies help get you back on track. Jump To Section: Cooling Tower Problems Cooling Tower Solutions Cooling Tower Problems There are four major water treatment issues that facilities have to maintain and monitor the control of, including scale, corrosion, microbial contamination and fouling for optimal system reliability and operational efficiency. The results include experiencing lower operating and equipment costs for the cooling systems, leading to less unscheduled downtime because of problems related to water. Here is a list of the most common cooling tower problems and throughout the industry and the solutions. Jump To Section: Cooling Tower Corrosion Problem Cooling Tower Scale Problem Cooling Tower Fouling Problem Water Level Control Problem Cooling Tower Contamination Problem Cooling Tower Corrosion Problem The environment of cooling systems is ideal for corrosion. For instance, a closed loop system does not lose much water, and they frequently get ignored in the maintenance process which makes them more susceptible for corrosion issues. Although, this neglect often leads to leaks and repairs that can be costly from cooling system leading to potential damages to other systems and locations. Cooling Tower Corrosion Solution: The solution to cooling tower corrosion is making sure your cooling tower coatings are applied correctly and still working properly. Cooling Tower Scale Problem The heat exchange surface helps the cooling system’s main function perform, but can be responsible for scale production. When high temperatures lower solubility of specific species within water, like calcium, which can form deposits on the heat exchange surface, which causes the scale. This acts like an insulator that lowers the tower efficiency and heat dispersal, leading to increased costs and consumption. Cooling Tower Scale Solution: Regular cooling tower cleaning and maintenance will help keep scale out of your cooling towers which will increase your cooling towers efficiency. Cooling Tower Fouling Problem This is a common issue which is caused from the ‘three-d’s’, dust, dirt, debris. Although, it can be caused from other contaminants within the system too, like microbiological growth or corrosion products. Fouling can have a dramatic effect on reducing system efficiency while increasing operational costs and energy usage. Cooling Tower Fouling Solution: Fouling usually takes place in metal that is not protected or low quality. Stainless steel is used to prevent corrosion in float switches and other cooling tower components. Water Level Control Problem Another major problem with cooling towers is having to replace water level controls every 3 years. Replacing your float switches can be costly. Water Level Control Solution: That’s why Cooling Tower Products works directly with the top selling water...