Table of Contents
Mobrey: A Comprehensive Redefinition of Industrial Sensing and Control Systems
Mobrey is an automatic water level controller used in steam boilers. It is a key component of steam boiler safety, as it helps to ensure that the water level in the boiler remains within a safe range. Mobrey works by using a float to measure the water level in the boiler. When the water level drops below a certain point, the float activates a valve that opens to allow more water into the boiler. When the water level rises above a certain point, the float activates a valve that closes and stops the flow of water into the boiler. This ensures that the water level in the boiler remains constant, which helps to prevent the boiler from overheating or becoming too cold.
What is the Boiler and function of Mobrey in boiler?
The main function of Mobrey Magnetic Level Switches in a boiler is to ensure the proper water level. Maintaining the correct water level is essential for the safe and efficient operation of a boiler. If the water level is too low, the heating elements may be exposed, leading to overheating. Conversely, if the water level is too high, it can result in water carryover into the steam, potentially causing damage.
The Mobrey Magnetic Level Switch operates on the principles of magnetic attraction and repulsion. It typically consists of a float that moves with the water level and magnets inside a guide tube. As the water level changes, the float moves, causing the magnets to actuate a switch. This switch, in turn, controls the water feed into the boiler.
Mobrey is the name used for the Automatic water level controller, it comes under the category of mountings and fittings of Steam Boiler Assembly.
As the name suggests, it is used for maintaining the water level in the Boiler shell. It is mostly used in smoke tube steam boilers not in water tube boilers, as the shell diameter of the former is greater than that of the latter irrespective of their running capacities and working pressures.
For smoke tube boilers, mobrey is fitted externally on the nozzles coming out of the steam boiler shell curvature. It consists of a hollow cylindrical unit in which a float hangs.
So, when the feed pump works, it supplies feed water to the boiler shell and it gets filled up. From those nozzles, the water also enters the hollow cylindrical pipe of the mobrey, as a result, the float goes up.
Now during the operation of the Steam Boiler, the water gets heated up and gets converted to steam.
Meanwhile, the water level, because of this steam generation, the water level in the Steam Boiler shell goes down and along with it, the float of the water level controller also comes down.
After a certain distance is covered by the float, Mobrey sends an electrical signal to the electrical panel and then the panel starts the feed pumps to overcome this shortage and the float goes up again after refilling.
This system on which the money and feed pumps coordinate is also known as the Cascade Control System.
A Cascade Control System, uses the output of the primary controller to manipulate the output of the secondary controller, as the output of the secondary controller is the desired one. Here the primary controller is the mobrey and the secondary controller is the feed pump.
It ensures the desired quantity of water is maintained in the Steam Boiler Shell and also enhances the overall safety of the Boiler during operation by minimizing manual intervention.
Also Read: Air Preheaters
We at Thermodyne Boilers had supplied and installed successfully these Mobrey (automatic water level controllers) for all our clients.
Mobrey FAQ
A Mobrey level switch is a device that is used to control the water level in a boiler. It is a magnetically operated switch that is mounted on the outside of the boiler. The switch has a float that is attached to a magnet. As the water level in the boiler rises, the float rises and activates the switch. The switch can then be used to control the boiler feed pump, burner, or alarm.
There are several benefits to using a Mobrey level switch. First, it can help to ensure that the water level in the boiler is maintained at a safe and consistent level. This can help to prevent the boiler from overheating or from running out of water. Second, a Mobrey level switch can help to prevent damage to the boiler. If the water level in the boiler gets too low, it can cause the boiler to overheat and damage the components. Third, a Mobrey level switch can help to improve the efficiency of the boiler. By maintaining the water level at a consistent level, the boiler can operate more efficiently and use less fuel.
A Mobrey level switch works by using a magnet and a float. The magnet is attached to the switch and the float is located in the water in the boiler. As the water level rises, the float rises and moves the magnet closer to the switch. When the magnet gets close enough to the switch, it activates the switch. The switch can then be used to control the boiler feed pump, burner, or alarm.
A Mobrey level switch is typically installed on the outside of the boiler. The switch is usually installed near the top of the boiler so that it can easily monitor the water level.
A Mobrey level switch should be maintained on a regular basis. The switch should be inspected for any signs of damage or wear. The float should also be checked to make sure that it is free to move up and down. The switch should be cleaned and lubricated as needed.
Some common problems with Mobrey level switches include:
The switch may not activate when the water level gets too low.
The switch may activate when the water level is too high.
The switch may not be able to maintain the water level at a consistent level.
The switch may be damaged or worn.
If you are having problems with a Mobrey level switch, you can try the following troubleshooting steps:
Check the switch for any signs of damage or wear.
Clean and lubricate the switch.
Adjust the switch settings.
Replace the switch if it is damaged or worn.
Mobrey-level switches are available from a variety of sources. You can purchase them from online retailers, industrial supply stores, or from the manufacturer.
The cost of a Mobrey level switch will vary depending on the model and the features. You can expect to pay anywhere from a few hundred dollars to several thousand INR for a Mobrey level switch.
When working with a Mobrey level switch, it is important to take the following safety precautions:
Always disconnect the power to the boiler before working on the switch.
Wear safety glasses and gloves when working on the switch.
Do not touch the switch while it is energized.
Be careful not to damage the switch when working on it.
Boiler Resources
- Boiler Losses That Eat Away Your Profits
- Dissolved Gases in Feed Water and Its Effect
- Pressure Reduction System
- How to minimize the Blowdown Losses
- Boiler Accessories
