BS EN 15767-2:2009 pdf download

BS EN 15767-2:2009 pdf download.Portable equipment for projecting extinguishing agents supplied by fire fighting pumps一 Portable monitors Part 2: Water nozzles.
NOTE This should be acooroplished either ttwough the full open nozzle poeition or through a fhjsh feature t th nozzle. In nozzles with flowrate over 2 000 I. blockage due to debris is not bkely because of the larger opening o the nozzle
4.3.2 Water nozzles equipped with a flush feature shall have a mechanical andor visual device to indicate to the user when the flush feature is being engaged.
4.4 Hydraulic characteristics
4.4.1 Pressures
The following pressures, measured at the nozzle inlet, shall be used for the determination of the hydraulic characteristics:
reference pressure: p, 6 bar ±0.1 bar median pressure for automatic water nozzle: p,,,; nominal pressure: p— 16 bar:
test pressure: p — 25,5 bar
4.4.2 Flowrates
All flowrates indicated on the nozzle shall be measured at straight jet and at the maximum spray angle position at the reference pressure pq.
The ttowrates measured at the reference pressure p1shall not deviate by more than – 0/+ 10 % of the flowrate setting of the nozzle.
NOTE The deviation should also apply when the shape of the stream le altered.
4.4.3 Effective throw
The water nozzle shall achieve, for each ttowrate position above 500 11mm, a minimum effective throw c1 as shown in Figure 1, when set to a straight jet at the reference pressure.
For water nozzles above 4 000 L’min, the minimum effective throw shall be at least 60 metres.
5 Testing and verification
5.1 General
All tests shall be done with water orVy.
Unless otherwise specified, tests shall be carried out at the reference pressure pp. In the following order.
NOTE Guidance tot accepnnce tests on delivery is given an Annex A.
5.2 Jet spray angle measurement
Arrange the water nozzle on a fixed support In a horizontal position 1,5 m above the ground, in a zone where the wind speed is lower than 2 rn/s.
Arrange a rule perpendicular to the flow at a distance of 1 m. This rule shall be marked in order to determine the spray angle.
5.3 Heat and frost test
5.3.1 SensitIvity to heat
It shall be possible to use the water nozzle without restricting its function after it has been stored for 24 h at
(55 ± 2) 00,
NOTE Hand prolecton should be used wflen carrying ou this test
5.3.2 Sensitivity to frost
The water nozzle shall be disconnected following operation for 1 mm at the reference pressure p. II shall then be drained for 1 mm and stored at a temperature of (- 15 ± 2) C for 30 mm. Following this, it shall still be possible to move the operating elements manually.
NOTE Hand protection is recommended
5.4 Flushing
The combination nozzle shall be held in the vertical position, discharge end down, The steel ball shall pass through the nozzle.
5.5 Flow and throw test
The effective throw shall be measured under the following conditions, in accordance with Figure 2:
effective throw (in metre): furthest droplets- 10% = d,,q = 0,9 d,.,1, pressure at the inlet of the nozzle: pp a 6 bar;
inclination: (30 ± 05)°;
height: the outlet of the nozzle shall be no more than 1 m from the ground; maxinum wind speed: 2 m/s (Beautort scale 3).
5.6 Leak-tightness test
The leak test shall be conducted in accordance with 4.5.
6 Information for use
6.1 Instruction and maintenance handbook
6.1.1 General
Each water nozzle shall be delivered with an instruction and maintenance handbook.
NOTE 1 These instructions may be combined with those for the portable monitor body.
NOTE2 This handbook should be made avai lable, if required by the user, in a digital format.
6.1.2 Instruction handbook
The instruction handbook shall contain at least the fllowing information:
name and/or logo and contact details of manufacturer;
data sheet according to Annex B (see also an example of a complete data sheet in Annex C);
product warnings;
general information for use.