How Does a Wet Pipe Sprinkler System Work?
A wet pipe sprinkler system contains no water until it is operating. The sprinkler orifices are open when the piping is at atmospheric pressure. In addition, a “deluge valve” prevents water supply pressure from forcing water into the piping. The valve is a mechanically latched, non-resetting valve that stays open when tripped. This valve prevents water from entering the piping until a tripped deluge valve activates it.
Dry pipe sprinkler systems operate with pressurized air. This type of system is more expensive and complicated to install. It is also subject to design restrictions. Dry pipe systems do not work in cold spaces. Instead, they have a valve that releases pressurized air. When a fire begins, the air in the pipe is released, allowing water to flow through the system. This type of sprinkler system can also work for commercial buildings.
A wet pipe sprinkler system uses pressurized air to suppress fires. The air comes from a compressed source, such as an air compressor. During a fire, the pressurized air pushes against a clapper valve, preventing the flow of water into the dry system. When the fire gets too hot, the link in the sprinkler head melts, releasing the air and letting the water into the dry system.
A pressurized air system requires additional components.
These components keep the pipe from freezing when temperatures are cold. NFPA 13 specifies the installation guidelines for the components of sprinkler systems. These guidelines help ensure that the system is installed correctly.
This way, it will do its job as intended. Contact a fire safety professional if you have questions about a specific system. The professionals at ADT are here to answer your questions and assist you in the installation.
A wet pipe sprinkler system uses a system of piping filled with pressurized water. When a fire occurs, the water sprays from sprinkler heads. This type of system is less expensive to install and maintain and has other advantages. However, it can’t work well in cold climates because water can freeze in the pipes. Dry pipe sprinkler systems require less maintenance and can also be used in places prone to freezing.
Dry pipe systems provide more precise fire protection than wet pipe systems. Still, the drawback is that they are less suitable for places where temperatures drop below 40 degrees. In addition, the water can freeze, causing additional property damage. As a result, it is essential to consider how you want to protect your property in such a climate. If you need a system that protects sensitive equipment, a dry pipe system is a suitable choice for you.
Nitrogen purging technology
The use of nitrogen is an excellent way to reduce exposure to dissolved oxygen, which is the primary cause of corrosion. This type of technology disperses nitrogen in the water used to fill the system, which forces trapped air out of the vents. This method has two main benefits: it removes dissolved oxygen from the water and is much less costly than compressed air.
The downside, however, is that it is not as effective as nitrogen-purged systems. The nitrogen generated by the generator is used to purge and recharge the wet pipe sprinkler system. By bubbling nitrogen into the system, oxygen dissolves in the water, which can cause corrosion. As a result, nitrogen is used to remove the oxygen from the water, resulting in the system working more efficiently. This is especially important since water is one of the primary components of corrosion. In addition, nitrogen can prevent the clogging of the piping network.
A nitrogen generator is necessary to make this process possible. It must be installed in the system, close to the waterline so that the nitrogen is diluted in the system as it travels through the pipe network. Once the nitrogen generator is installed, the dry pipe fire sprinkler system is made up of 98%+ nitrogen. The nitrogen generator will gradually dilute oxygen and leave the system free of oxygen. This process is repeated three times.
This method reduces the risk of corrosion by replacing the air with nitrogen. The nitrogen gas produced by the generator is 99.5 percent pure and contains a maximum of 0.5 percent oxygen. Therefore, it does not require venting to prevent corrosion. In addition, because the nitrogen is purer, it is less expensive to operate and maintain.
This technology allows you to reduce your overall costs. So if you want to reduce the cost of a nitrogen generator, it is worth considering.
The nitrogen discharged from the nitrogen generator is located just above the wet pipe alarm valve on the main riser. The entrance point will be a pipe equipped with a check valve. Injection pipes extend through the central riser pipe. Injection pipes may be equipped with a sparging element that allows the dispersion of millions of nitrogen gas bubbles into the water. The sparging device may not be required to strip dissolved oxygen from the water.
Double interlock pre-action sprinkler system
A double interlock pre-action sprinkler system operates by requiring two independent events before the water is discharged. First, the piping in the sprinkler system must lose air pressure due to the operation of the sprinklers. Second, a deluge releasing panel must activate a solenoid valve upon fire detection. When both of these events occur, the system will activate the water sprinklers.
Another primary concern with the older, dry pipe systems is prone to leaks. Leaks can occur if a single interlock valve opens. The double interlock system uses nitrogen or air-filled piping system. This adds security but requires a challenging installation process. But the added security is well worth it! This is an excellent option for businesses concerned about fire safety and wants to avoid potential property damage.
The main benefits of a double interlock pre-action sprinkler system for dry pipe are that it eliminates the need for a dry valve and allows a fire suppression system to activate faster. In addition, the system’s water delivery time is significantly reduced by using automatic sprinklers and supplemental electric detection devices. Moreover, a double interlock pre-action system is much more expensive and complex than a single interlock pre-action sprinkler system.
Single interlock pre-action sprinkler systems and double interlock pre-action systems work similarly to dry pipe systems. A pre-action valve holds back the water supply until sufficient heat is generated to activate the sprinkler head. Both of these systems are called single-interlock and standard systems. However, you might need a double-interlock pre-action system depending on the type of system used.
The double interlock pre-action sprinkler system can be installed in a variety of types of buildings. However, single interlock pre-action systems are the most commonly used. Double interlock systems can be installed in any building, but a single interlock system is more reliable. However, wet pipe sprinkler systems are not suitable for environments with cold climates. For these types of buildings, the water may freeze.
Dry pipe systems are very similar to wet pipe systems, but they are not continually filled with water. Instead, the water delivery is controlled through a valve away from the sprinklers. The valve opens when a pressure drop occurs, or a glass bulb breaks in the sprinkler head. When this occurs, water flows from the sprinkler head. During a fire, water is a critical element in combating the blaze.
There are two main reasons why dry pipe sprinkler systems are better for some situations than others:
- They can be installed in buildings with tight space restrictions.
- Dry pipe sprinkler systems reduce the size of the system, which increases the capacity of the sprinkler.
- Dry pipe sprinklers do not require any piping, making them much easier to install.
These advantages outweigh the potential drawbacks of dry pipe systems.
A dry pipe sprinkler system can be used in areas where a wet pipe sprinkler system is impractical. Both systems are built to deliver water to the sprinkler head, but their benefits differ. Water delivered by a dry pipe system can be delayed by up to 60 seconds. The difference in pressure means that it is possible to detect a drop in pressure before the system floods. This is why dry pipe sprinkler systems need to fill quickly with water.
When choosing a wet pipe sprinkler system, you should consider the size of the fire area. The size of the fire area should be proportional to the water supply. If the water is too small, the sprinkler system will fail to do its job. When a wet pipe sprinkler system is used, the area is more than double that of a dry pipe system. So, even though a dry pipe system is less expensive, it is a better choice if space is limited.