MPDU System
Gas extinguishing modules type MPDU 150-V-12 and gas fire extinguishing batteries type B2-B10 MPDU 150-V-12 and 2B2-2B10 MPDU 150-V-12 (hereinafter referred to as batteries) are intended for storage and release of gas extinguishing agent into the protected room СО2 (hereinafter GFFS) for extinguishing fires by volumetric and local method.
The module consists of a cylinder and a locking and starting device (hereinafter ZPU). The ZPU provides hermetic locking of the GFFS in the cylinder and its release when an electric impulse, pneumatic pressure is applied or the operator's hand is applied to the lever of the manual start device.
In the modules of the MPDU systems, to control the mass of the GFFS, a tensometric weight platform and a weight controller are used, which is triggered when the GFFS mass decreases below the permissible value (5%).
Two types group of cylinders are manufactured:
- B2-B10 MPDU 150-V-12 – single row;
- 2B2-2B10 MPDU 150-V-12 – double row.
Single row cylinder banks.
Single row cylinder banks include from 2 to 10 cylinders connected to the manifold by means of high-pressure hoses.
Two methods of СО2 release are used:
- Electric impulse is sent to solenoid lock valve of a pilot cylinder. Pressure from the pilot cylinder is transferred to other cylinders to initiate their discharge pneumatically.
- Single row cylinder bank can be discharged manually by turning manual actuator lever of pilot cylinder. Pressure from pilot cylinder is transferred to other cylinders to initiate their discharge pneumatically
Double row cylinder banks.
Double row cylinder banks include two single row banks with the same actuation features described above. GEA from both cylinder banks passes to the collective manifold. It is allowed not to equip one of the banks with a solenoid valve.
Double row cylinder marking has additional digit 2: B2-B10 vs. 2B2-2B10.
Single row cylinder bank may have a check valve installed; in such a case marking will include OK.
Double row cylinder banks always have check valves, so there is no OK in the marking.
Discharge procedure may include:
- Simultaneous release of all cylinders in single row bank;
- Simultaneous release of all cylinders in double row bank with up to 8 cylinders in each row;
- The step-by-step release of all cylinders in double row bank.
Manifolds are equipped with drainage assemblies to prevent unauthorized release.
All cylinders and cylinder banks correspond to Climatic Category 0 of Allocation Class 4 according to GOST 15150 with temperature range from -20 to 550C.
MPDU cylinders and cylinder banks are serviceable restorable products.
MPDU cylinders and cylinder banks types:
| Cylinder type | Working pressure, MPa | Lock valve diameter, mm | Container diameter, mm | Lifecycle, years | Cylinder, l |
| MPDU 150-V-12 | Рwork = 14,7 | Dn=12 | 320 | 30 | 60, 80, 100 |
| Single-row battery B2-B10 MPDU 150-100-12 | Рwork = 14,7 | Dn=12 | 320 | 30 | 80, 100 |
| Two-row battery B2-B10 MPDU 150-100-12 | Рwork = 14,7 | Dn=12 | 320 | 30 | 80, 100 |
MPDU cylinders and cylinder banks specification:
| Parameter | Value | ||
| Cylinder size (volume), l: | 60 | 80 | 100 |
| Cylinder volume, (+/- 2.5), l | 60 | 80 | 100 |
| Dimensions, mm: | |||
| – container diameter, mm | 320 | 320 | 320 |
| – cylinder height, mm | 1085 | 1395 | 1638 |
| – height including protecting cap, mm | 1142 | 1452 | 1695 |
| – height to discharge elbow axis, mm | 1024 | 1344 | 1577 |
| Empty cylinder weight (±2), kg | 68,7 | 83,7 | 95,9 |
| Cylinder filling factor, kg/l | 0,72 | ||
| Lock valve and dip tube nominal diameter, mm | 12/12 | ||
| Lock valve discharge nipple thread | W21,8×1/14 DIN 477 | ||
| Working pressure, MPa (kgf/cm2) | 14,7(150) | ||
| Test pressure, MPa (kgf/cm2) | 25,0(255) | ||
| Safety device actuation pressure, MPa (kgf/cm2): : | |||
| – minimum | 18,5(189) | ||
| – maximum | 20,0(204) | ||
| Pneumatic annunciation pressure, MPa (kgf/cm2): | |||
| – minimum | 2,1(21) | ||
| – maximum | 14,7(150) | ||
| Weight monitoring device supply voltage, V | |||
| – nominal | 12 | ||
| – minimum | 6 | ||
| – maximum | 30 | ||
| The number of module trips during the lifetime, times | 50 | ||
| Equivalent module length, m, not more than | 3,5 | ||
| Time of CO2 output is 95% by mass, s, not more than | 60 | ||
| Remainder of CO2 in a cylinder, kg, not more than | 0,5 | ||
| Service life of the module before cancellation, years, not more than | 30 | ||
| Range of application temperatures, оС | -20 до +55 | ||
| Periodicity of the examination of the cylinder | once every 10 years | ||
*Notes:
1. Cylinder weight includes transportation plug and do not include protective cap, packing, and annunciators
Protective cap and packing weight is about 2.5 kilos
2. Protection rating – IP67
MPDU cylinders and cylinder banks are manufactured in bulk by ASPT Spetsavtomatika according to design specifications:
TU 4854–007–68899756–2012
Nowadays СО2 (carbon dioxide) is one of the most common gaseous extinguishing agents.
MPDU cylinders as well as MPDU cylinder banks are designed for storing and discharging of CO2 as part of local or flooding fire suppression systems.
The cylinder consists of a container and lock valve. Lock valve is used for keeping agent pressurized in a container and СО2 releasing upon receiving an impulse from the actuator (electric, pneumatic or manual)
Tensometric weighing bed with a controller is used for monitoring СО2 weight. The signal of low СО2 weight goes off if it decreases by 5%.
