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Different Types of Fire Sprinkler Heads & Applications

Different Types of Fire Sprinkler Heads & Applications

Different types of fire sprinkler heads

There are several types of automatic fire sprinkler heads, each designed to be used in a particular application. The automatic fire sprinkler heads vary in their functionality and performance. Fire safety device manufacturers and suppliers are required by the Australian Standard AS 2118 Guidelines to use the appropriate type of fire sprinkler head based on their applications.

A conventional type sprinkler head

Conventional fire sprinklers are designed to create a spherical type of discharge with a proportion of water being thrown upwards to the ceiling. They are usually made with a universal type deflector, which means they can be used in either the upright or pendent position. Some conventional sprinklers, however, are made in two types: one suitable for use in the upright position and the other for use in the pendent position.

conventional type sprinkler head

Spray type sprinkler head

The conventional spray sprinkler is a type of automatic sprinkler that produces a parabolic discharge below the plane of the deflector with little or no water being discharged upwards to wet the ceiling. A spray sprinkler is made in two types: one suitable for use in the upright position and the other for use in the pendent position.

Spray sprinklers are designed to provide even coverage over an area of fire origin, and they do not require a pressure tank or separate piping system to operate. Some models include additional features such as adjustable sensitivity, multiple stations and/or a manual override control.

Spray sprinklers have a limited range of application due to their design and performance characteristics, which include low water distribution uniformity, high pressure requirements, low sensitivity threshold levels and lack of back-flow protection capability.

spray type fire sprinkler head

Flush type sprinkler head

The flush sprinkler is a concealed sprinkler that is installed pendent, with the base flush to the ceiling. It has an exposed heat-responsive element and retracted deflectors which drop down to the normal position on actuation.

Flush sprinklers are normally used in hotel lobbies, dining rooms, offices, boardrooms and parts of retail stores. Flush sprinklers are not suitable for use in atmospheres that are corrosive or subject to a high dust content.

Flush sprinklers utilizing chains to locate the deflector are only suitable for use with level ceilings unless specifically listed otherwise.

flush fire sprinkler head

Recessed or escutcheon type sprinkler head

The escutcheon sprinkler is a type of sprinkler that is used in areas where there are concerns about obstructing the spray pattern or response time. The escutcheon sprinkler is typically used with a spray sprinkler, and it is designed to ensure that the response time of the heat responsive element is not unduly impeded and that the discharge spray pattern is not obstructed.

The escutcheon sprinkler can be either one-piece or two-piece adjustable, depending on the manufacturer. The yoke portion of the sprinkler is mounted within the recessed housing, which protects it from damage.

Recessed or escutcheon type sprinkler head

Concealed type sprinkler head

The concealed sprinkler is a spray sprinkler that is fully recessed in a concealed housing and fitted with a cover plate assembly designed to release at or before the operating temperature of the sprinkler. Concealed sprinklers provide the same unobtrusive appearance as flush sprinklers, but are available in a variety of styles, including design sprinklers, pre-action systems for use with fire suppression systems, and special designs for use in areas where space is limited.

concealed fire sprinkler head

Sidewall type sprinkler head

Sidewall sprinklers are designed for installation along the walls of a room close to the ceiling. A sidewall sprinkler provides a one-sided (half-paraboloid) discharge pattern directed outwards with a small proportion discharging on the wall behind the sprinkler. Sidewall pattern sprinklers are not normally a substitute for conventional or spray pattern sprinklers and their use is limited to such locations as offices, entrance halls, lobbies and corridor where the presence of water on vertical surfaces is acceptable.

Sidewall sprinklers are designed to be mounted close to the ceiling along the sidewalls of a room. They provide a one-sided (half-paraboloid) discharge pattern directed outwards with a small proportion discharging on the wall behind the sprinkler. Sidewall pattern sprinklers are not normally a substitute for conventional or spray pattern sprinklers and their use is limited to such locations as offices, entrance halls, lobbies and corridors.

A sidewall sprinkler may be used with advantage in drying tunnels and hoods over papermaking machines where condensate dripping from sprinklers and pipework at the ceiling could be troublesome and also in certain other locations such as shop windows and under platforms having low headroom where sprinklers would be subject to damage.

Sidewall sprinklers are sometimes referred to as “wall fired” or “vertical” sprinklers but these terms should not be used since they are not accurate descriptions of this type of device.

Sidewall type sprinkler head

Dry pendent and dry sidewall type sprinkler heads

The dry pendent sprinkler is a fire protection device that is designed for use in portions of premises protected by a dry or an alternate wet and dry system where it is not practicable to install sprinklers in the upright position, or on a wet system where the sprinklers may be subject to frost. It has a conventional or pendent spray type deflector. The dry pendent sprinkler is manufactured integral with drop pipes of varying lengths, the valve being so placed that there is no pocket or depression where water can be trapped.

The dry sidewall sprinkler is a fire protection device that is designed for use in portions of premises protected by a dry or an alternate wet and dry system where it is not practicable to install sprinklers in the upright position, or on a wet system where the sprinklers may be subject to frost. It has either conventional or pendent spray type deflectors. The dry sidewall sprinkler is manufactured integral with drop pipes of varying lengths, the valve being so placed that there is no pocket or depression where water can be trapped.

Dry pendent sprinklers are made with a conventional spray type deflector and are available in two different types: standard (with a spray angle of 25°) and wide angle (with a spray angle of 40°).

Dry sidewall sprinklers are also made with conventional spray type deflectors and are available in two different types: standard (with a spray angle of 35°) and wide angle (with a spray angle of 55°).

Dry pendent and dry sidewall type sprinkler heads

Dry upright type fire sprinkler head

The dry pendent sprinkler is a fire protection device that is designed for use in portions of premises protected by a dry or an alternate wet and dry system where it is not practicable to install sprinklers in the upright position, or on a wet system where the sprinklers may be subject to frost. It has a conventional or pendent spray type deflector. The dry pendent sprinkler is manufactured integral with drop pipes of varying lengths, the valve being so placed that there is no pocket or depression where water can be trapped.

The dry sidewall sprinkler is a fire protection device that is designed for use in portions of premises protected by a dry or an alternate wet and dry system where it is not practicable to install sprinklers in the upright position, or on a wet system where the sprinklers may be subject to frost. It has either conventional or pendent spray type deflectors. The dry sidewall sprinkler is manufactured integral with drop pipes of varying lengths, the valve being so placed that there is no pocket or depression where water can be trapped.

Dry upright type fire sprinkler head

Fast response type sprinkler head

The fire sprinkler market is experiencing rapid growth due to the need for improved fire safety. Fast response sprinklers have been developed to meet this demand, which can be used in areas where traditional sprinklers are not required or desired.

Fast response sprinklers are designed with a high level of thermal sensitivity, enabling them to respond at an early stage of fire development. This allows for more efficient use of water and reduces the risk of damage caused by overspray when traditional sprinklers are activated.

Fast response sprinklers are available in both fixed and portable configurations, with many also being suitable for use in dry risers and wet risers. They may be used as part of a system or stand-alone applications depending on the application requirements.

Fast response type sprinkler head

When it comes to fire safety devices, it’s important to choose the appropriate type of fire sprinkler head for your application. As a business owner, you should make sure to work with a supplier who can provide you with fire protection services that include the installation of and replacement of fire sprinkler heads. This will ensure the safety and protection of everyone present in your building. For more information about this topic and any other fire protection related enquiry, please contact one of our expert technicians today.

Dedicated To Your Fire Safety

Alex

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