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Cylinder BD-20-1, 7 TU 1417-004-03455343-2004

Another activity of experts "NGOs" SEARCH "is the development of cylinders for storage media used for fighting fires. One of the representatives of this direction is a cylinder DB-20-1, 7. Body of the cylinder is made of aluminum alloy AMg6 thickness 2,5 mm. The power envelope is absent. Cylinders 20 l, working pressure 1,7 MPa. On the base of the cylinder together with specialists from the implementing company WF "Aspect" created a portable fire extinguisher. The working fluid used refrigerant. Test cylinders were completed in 2000 In 2005, an additional technical task of keeping the main geometric dimensions of the cylinder was designed DB-20-1 ,7-01, whose design consists of a power shell and liner made of a material 12X18H10T. In 2006, the party made installation of fire extinguishers in quantities of 50 pieces., Which are currently successfully operating on surface ships of the Russian Navy.

Specifications cylinder shown in Table 1.

 
Table 1
Parameter setting for performance
DB-20-1, 7 DB-20-1 ,7-01
Capacity, l 20,0 ± 0,3
outer diameter D, mm 252,0 ± 1,0
length of the cylinder L, mm 640 ± 10
Mass balloon kg 3,5 ± 0,2 5,2 ± 0,2
working pressure in the tank with 50 ° C, MPa (kgf/cm2) 1,7 (17)
Pressure test during hydraulic tests MPa (kgf/cm2) 2,2 (22,5)
Minimum pressure fracture, MPa (kgf/cm2) 4,08 (41,6)
thread on neck
internal
M30 * 1,5-7H GOST
24705-81
Number of loading cycles, no more than 5
Work environment
Chladone 227ea TU
2412-049-00180689-96
Nitrogen GOST 9293-74
weight is filled environment, not more than, kg 1920
Operating Temperature from minus 50 and plus 50
specified service life, years

1920