Water mist expertise is still a comparatively new concept by means of fire suppression, yet it’s proving to be an thrilling improvement within the industry. As เกจวัดแรงดันน้ำประปาราคา evolves, so do the laws, legal guidelines and necessities so as to improve safety and allow development. These can range largely from country to nation, and even region to region.
The means by which a water mist system operates is a similar mechanism to the standard sprinkler system in that the nozzles are normally activated through a bulb which blows at a particular temperature permitting for the activation of the mist by way of a low-pressure water piping system.
Here we take a look at how some water mist nozzles are produced and put in – from arriving as a big ‘bar’ of metallic, to turning into the environment friendly water mist nozzles we see put in in plenty of new projects/developments throughout a lot of the globe at present.
The steel arrives for slicing
Here at Dual Mist Ltd, Stainless Steel 304 is used for lots of parts as this can be very durable and corrosion resistant compared to different comparable metals. The physique is machined out of Brass CZ121, which arrives as massive bars of metallic that are delivered to the warehouse in 3m lengths. This is then minimize into two smaller elements ready to insert into the machine. pressure gauge digital ราคา have the power to machine the parts they require in-house although it could possibly show very helpful for cost and production functions as we are about to see.
Machining
The steel is fed to a Nakamura WT150 CNC lathe. This high-performance Japanese machine software is equipped with carbide tooling and high-pressure through coolant methods, with the twin-spindle and twin-turret making haste of the otherwise sophisticated elements. A Citizen M532 Sliding Head Lathe is used for the smaller elements.
A Citizen L12 additionally makes the filters with a functionality of drilling 365 holes in 51 seconds, completely automated – this implies it may possibly turnover an incredible 4,000 filters in a weekend utterly unmanned.
The brass heads are also de-burred on the machine, removing all sharp edges earlier than being polished and despatched for Electroless Nickel Plating. This supplies a corrosion-proof coating to the brass, enabling it to become much more sturdy. All elements are then inspected for dimensional accuracy before the meeting stage.
This Technifor Laser machine engraves each nozzle in preparation for the testing levels.
Assembly
There are many small parts of assorted sizes and shapes that make up the nozzle – In the DM4R nozzle, (as seen on the leak-testing pic) there are a complete of thirteen elements or ‘components’. These components are then meticulously put collectively and assembled by the manufacturing group requiring a good quantity of labour before the final product is achieved. Various phases embody tightening with specially tailored instruments, pressing using a hand-press and utilizing a particular ‘Locktite’ formula at some stages which is a threadlock that forestalls fixings from coming unfastened in the course of the operational lifetime of the product. The last stage of assembly is rigorously loading the bulb and applying the proper load to it utilizing a torque wrench.
The assembled nozzles are then placed on another machine to have the ability to be labelled and uniquely identified utilizing a serial quantity. At Dual Mist Ltd this is carried out on a Technifor Laser Engraver fitted with a 4th axis unit before they are able to be positioned via the assorted stages of testing.
Testing
Cull Testing
Also known as bubble testing in layman’s terms, this check is to make sure no damage has occurred to the bulb during assembly and is a crucial test for LPCB approval. The take a look at includes using a high-powered microscope to measure the scale of the bubble in each bulb before putting in warm water so as to shrink the dimensions of the bubble to nothing. Once this is checked, the nozzles are then left to rest and return to room temperature before the bubble is measured once once more in order to guarantee it has returned to the original measurement within a small tolerance.
Leak Testing
Every nozzle can also be stringently examined for leaks by making use of 24-bar pressure for 1 hour and making certain no water has escaped. It is uncommon for any leaks on the manufacturing line, however this is an extremely very important stage of the testing as leaks may occur if dirt is trapped throughout the seal face.
Activation Testing
On a monthly basis, random nozzles are additionally tested for activation by putting the nozzle on a pressure jig at varied pressures and applying warmth to the bulbs. The nozzles ought to all activate cleanly throughout the complete strain vary specified to that nozzle.
A member of the production staff uses a microscope and software program to discover out the size of each bubble within the bulb.
Approvals
At Dual Mist Ltd, these tests usually are not simply to assure the standard of the manufacturing line however are also an necessary a half of the LPCB Approval. These approvals enable customers to recognise that the merchandise they’re buying are made to the very best possible quality normal in the region.
The disadvantage to this is that the Approval Testing system can be both expensive and time-consuming – sometimes needing to be booked a quantity of months in advance and requiring years of exhausting work to realize.
The nozzles produced by Dual Mist have been put through their paces at BRE Global by means of each fire testing and component/type approval.
Tamper proofing
In order to ensure that no person is tempted to interfere with the grub screw holding the bulb, a small plastic bung is pressed into the grub screw. The pressure load setting on the bulb is then subsequently mounted.
The nozzles are then ready to be packaged and despatched off for set up.
Here is an example of a control panel having been installed in The Claridges Hotel, London, UK. This is the place the system is operated.
Installation
Rather than having to make use of the heavy and labour-intensive metal pipes often used in high-pressure techniques, low-pressure water methods can use CPVC piping. This is a particular kind of fire-resistant plastic enabling fast set up. Instead of threading each pipe, a heated glue can be utilized to quickly build giant pipe networks. These networks are accredited to deal with as much as 12 bar strain. The nozzles are screwed right into a special pipe adaptor using a half-inch gas becoming.
An electrical control panel is fitted for the system control along with pumps and a water tank, usually with a mains feed.
The system is examined, signed off and handed over to the shopper.
The final product once installed. This reveals how we expect to see the nozzles once a challenge has been completed.
Conclusion
As we will see there are heaps of levels to go from metallic to nozzle head with every nozzle taking a big effort by varied professionals to finish to the approved standard.
Not only do water mist nozzles require a quantity of levels of machining and assembling, they have to also undergo a string of tests in order to be permitted for installation. Once installed, there are even additional tests undergone, sometimes by third-party organisations in order for the whole fireplace suppression system to finally be handed over to the client.
Water mist expertise assures security, quality and assurance through the stringent testing that is required.
With the latest publication of water mist standards, particularly in Britain over recent years, building developers can now be assured that the quality required for water mist methods is now at an equal standard to different suppression methods.
For more info, go to www.dualmist.com
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