Backpack/ Knapsack Water Mist Fire Extinguishing Gun

Inspection Item

Standard

Inspection Result

Appearance

The surface of each component should be smooth without damage and metal pieces should have anti-rust treatment.

Conformity

Basic parameter

Gas cylinder

Volume (L)

3

3

Nominal pressure (MPa)

30

30

Liquid-storage barrel

Capacity (L)

14±0.5

14.2

Working pressure (MPa)

0.8±0.1

0.8

Extinguishing agent

AFFF6

Conformity

Hose

Length (m)

1.5±0.12

1.50

Safety valve

Opening pressure of liquid-storage barrel’s safety valve (MPa)

1.1±0.1

1.1

Opening pressure of pressure reducer’s safety valve (MPa)

1.1±0.1

1.1

Pressure reducer

Input pressure range (MPa)

3~30

3.0~30.0

Regulated output pressure (MPa)

0.8±0.1

0.8

Weight (including foam liquid) (kg)

<32

31.26

Spraying and extinguishing performance

Flow (L/s)

Water, jet

0.25±0.03

0.27

Water mist/Foam

0.25±0.03

0.26

Injection time (s)

Water, jet

≥ 45

52.6

Water mist/Foam

≥ 45

54.6

Lancing distance (m)

Water, jet

≥ 15

15.0

Water mist/Foam

≥ 9

9.4

Injection angle (water mist/foam) (°)

≥ 60

60

Operating pressure of gun handle (N)

≤ 30

26

Remaining rate of injection (%)

≤ 1

0.5

Ratings (extinguishing performance)

3A

Conformity

144B

Conformity

Sealing performance

No leakage with the test according to the enterprise standard 6.4

Conformity

Pressure resistance of the gun (except the gas cylinder)

No break and permanent deformation with the test according to the enterprise standard 6.5.1

Conformity

Liquid-storage barrel

l   It should be made of stainless steel plate which is 1Cr18Ni9Ti and has a thickness of not less than 2mm. The stainless steel should meet the requirements of GB/T3280-1992 and have the effective warranty. Production number should be on the tank.

l   The welds shall be smooth without incomplete penetration, burning through, scar and some other defects which can deface the strength and appearance.

l   When the test pressure is 1.5 times as large as the maximum working pressure according to the 6.5.4, there should be no leakage or permanent deformation.

l   The burst pressure should be 5 times larger than the maximum working pressure and this test is conducted according to the regulation of 6.5.5. During this test, some phenomena should be noticed:

ü   There should not be debris flying out from the water tank.

ü   Blasting crack can’t be on weld.

ü   Blasting should show the plastic damage and the break should not appear radial.

l   Liquid-storage barrel shall be equipped with pressure relief device which is easy to operate, releasing the residual air pressure of the tank.

Conformity

Airbrush

l    The gun head is made of 1Cr18Ni9Ti.

l    The gun body is made of LY12 duralumin.

l    The switch is made of ABS plastic.

l    There should be no leakage or break for airbrush after the hydraulic strength test with 2.25MPa.

Conformity

Gas cylinder

l    The design, manufacture, test and use should be consistent with the provisions of “Gas Cylinder Safety Inspection Rules” and have the inspection report issued by the quality supervision departments at or above the provincial level.

l    There should be some marks on the gas cylinder, such as compressed air, number, pressure of hydraulic test, nominal working pressure, blasting pressure, nominal volume, weight, production date, inspection cycle, useful life, number of product standard and warning which shows no filling with fiber breakage or damage.

Conformity

Various valves, connectors and connecting pipes

l    Made of corrosion-resistant materials such as aluminum alloy and stainless steel

l    This product chooses the braided compression-resistant rubber hose. The hose’s nominal pressure is 1.5 times larger than the working pressure of liquid-storage barrel and it has the inspection certificate. The hose should have enough strength without leakage and permanent deformation when the test is conducted according to the 6.5.2.

l    The blasting pressure of connecting pipes should be 5 times as large as the working pressure.

l    The quick connector of this fire gun should be simple in operation and flexible in connecting and disconnecting. After plugging experiment for 2000 times, this fire gun should still meet the standards of 5.9 and 5.10.

l    There should be no resistance and leakage phenomena from spray to jet mode.

Conformity

Alternating pressure performance

This gun can spray normally after conducting the cycle performance test according to the standard of 6.6.

Conformity

Requirement of back bracket

There should be no fracture after conducting the strength test according to the standard of 6.12.

Confor