CO₂ High-pressure

Cylinders and cylinder banks of MPDU series are used in Modular Gas Fire Suppression Systems for fire protection of industrial facilities.

High-quality СО₂ according to GOST 8050-85 is used as fire extinguishing agent. СО₂ is stored in cylinders under pressure of its own vapors.

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%.

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

Certificates and Reports for MPDU cylinders and system components:

• Certificate of fire safety of modules MPDU
  
• Certificate for seismic resistance of MPDU modules
  
• MPDU protocol 150-100-12 transport strength
  
• Protocol MPDU 150-100-12 detection of resonant frequencies
  
• Protocol MPDU 150-100-12 seismic resistanceь
  
• Protocol MPDU 150-100-12 seismic impact
  
• MPDU protocol 150-100-12 vibration resistance