Dry Chemical Powder Extinguishing System (DCP)

DCP (Dry Chemical Powder) extinguishing systems are produced by C.S.I. S.r.l. for stationary fixed systems or mobile systems on trucks. DCP systems may feed fixed piped extinguishing lines, may have hose reels on their skid or, C.S.I. S.r.l. can produce a skid containing DCP unit and auxiliary equipment on the lower side and the upper side a Dry Chemical powder cannon for intervention against fire where powder is the only solution. As a holder of the H1 certificate (according to PED 97/23 directive), C.S.I. S.r.l. produces pressure vessels of the DCP systems up to 5000 kg capacities. Dry chemical powder systems are produced by several companies on the market with different operating principles. The challenge is to discharge the stored quantity of the powder in a predetermined time while leaving no residue in the tank. As characteristic behavior of the Chemical powder, when stored in the pressure vessel for a long term, it becomes a non- fluid extinguishing agent. With its special engineering design of DCP systems, designed by C.S.I. S.r.l., precise flow rates are guaranteed by using pneumatically actuated valve/safety valve combinations developed over the years. Pressure vessels are always designed and constructed with necessary previsions made for maintenance and inspection needs.

Sistemi di spegnimento a polvere
Dry chemical powder extinguishing system
Model DCP

Sistemi a polvere sono utilizzati principalmente per l’istinzione di incendi / Dry powder systems are used mainly for fire extinguishing of:
  • Incendi a Gas / Gas fires
  • Incendi, dove le fiamme devono essere abbattuti il più rapidamente possibile al fine per evitare l'estensione fiamme o per cancellare accelerazioni di un incendio, dovuti ad aumento della temperatura / Fires where flames must be knocked down as quickly as possible in order to avoid flames extension or to remove fire accelerations due to increase of temperature
  • L’istinzione di incendi senza acqua (dove l'acqua è rara (ad esempio: deserti) o la sua azione potrebbe avere effetti negativi (GNL)) / Fires to be fought without water (where water is rare (deserts) or its action could have negative effect (LNG))
Applicazioni più estese si trovano in: / Most extended applications are found in:
  • Stabilimenti petrolchimici e impianti a gas / Petrochemical factories and gas plants
  • Impianti chimici / Chemical plants
  • Depositi chimici / Chemical storages
  • Impianti nucleari e elettrici / Nuclear and electrical plants
  • Porti e aeroporti / Harbours and airports
  • Militare / Army
I nostri sistemi a polvere sono fatti di 4 diverse parti appositamente progettate per essere utilizzate con un prodotto polveroso, su un telaio di sostegno adatto dove sono fissati i seguenti elementi: / Our powder systems are made of 4 different parts specially designed to be used with a pulverulent product ,on an adapted supporting chassis where the following elements are fixed:

Polvere con il sistema del gas propellente: sistema B2
Dry powder with gas propellant system : B2 system

Due tipi di gas, generalmente si usa: Azoto N2; oppure CO²
Two types of Gas are generally used :Nitrogen N2 or CO²
Le 2 bombole con gas selezionato sono sotto pressione (150 bar per azoto N2 oppure 50 bar per CO²):
The selected gas is pressurized into a set of 2 cylinders (150 bars for N2 or 50 bars for CO²):
  1. Durante la prima fase, la bombola "PILOT" è attivata: immediatamente crea la pressione all'interno del serbatoio polvere e fluidifica (“si alza”) la polvere in modo efficiente.
    During the first phase ,the “PILOT” cylinder is activated: immediately it transfers its full stored pressure to the powder inside the tank and fluidifies the powder efficiently.
  2. Durante seconda fase la pressione interna del gas viene poi recuperata nella parte superiore del serbatoio (da 6 a 7 bar) tramite attuatore pneumatico e bombola di “servizio” / “SLAVES” /
    During the second phase the gas pressure inside is then recovered at the top of the tank (at 6 to 7 bars) for actuating pneumatically the SLAVES cylinder valves.
  3. Quindi (2 o 3 secondi dopo) bombola di servizio, controllata da un regolatore di pressione brevettato che assicura una pressione di esercizio di 10 bar all'interno del serbatoio.
    Then (2 or 3 sec later) the slave cylinders pressure is controlled by a single patented pressure regulator which ensures an operating pressure of 10 bars inside the tank.
  4. Questa pressione rimane costante per tutta la scarica di polvere ai "proiezione" si intende: con monitor con bocchelli manuali oppure con bocchelli fissi.
    This pressure will remain constant during the whole discharge of powder at the “Projection” means: monitor or hand nozzles or fixed nozzles.
  5. La distanza di proiezione rimane costante: da monitor (30 a 50 m) da ugelli (12 a 18 m): questa distanza è importante perche è la distanza di sicurezza necessaria per operatore.
    The throw distance will remain constant :monitor ( 30 to 50 m) nozzles (12 to 18 m): this important distance is the safe distance needed by the operator.
  6. Nota: / Note:
    CO² scarico pressione doppio del volume di gas rispetto a N2; così i volumi della bombola di CO² sono inferiori.
    CO² pressure release double the volume of gas compared to N2; so CO² cylinder volumes are inferior.
    Liquid CO2 discharge will be uniform compared to N2 discharge thus preferred by the operator.
  7. I volumi di gas bombola di servizio (slave) vengono adattati alle tubazioni dell'impianto, e fornisce la pressione desiderata al bocchello di proiezione (monitor di 9-10 bar, regulazione a mano 5-6 bar, bocchelli fissi 2-3 bar)
    Gas volumes of slave cylinders are adapted to the installation piping in order to supply the desired pressure at the projection nozzle( monitor 9-10 bars ,handline 5-6 bars,fixed nozzles 2-3 bars)

Principio di funzionamento / Operation principle

Guarda P&I in seguito / See P&I hereafter.

Come optional (NFPA17 o ANPI) e le opzioni selezionate dal cliente finale, il P&I e la nostra offerta può essere preparata in nostro ufficio di progettazione che ha esperienza decimale.
As optional (NFPA17 or ANPI) and options selected by the final user, the P&I and our offer may be adapted by our experienced design department.

Caratteristiche costruttive - Construction features

Norme di riferimento / Construction Code CEE 97/23 PED EN 13445 / ASME VIII Div.1
Pressione di progetto / Design Pressure 12 / 16 bar
Serbatoio / Foam Tank 355 NH-EN10028-3 / ASTM A 516 GR 70 Acc. al carbonio/Carbon Steel
Flange / Flanges ASTM A 105 Gr 05 Acc. al Carbonio/Carbon Steel
Valvola di sicurezza / Safety Valve Ottone / Brass
Capacità disponibile fino a 5000 kg Capacities up to 5000 kg

How to contact us?

Address
Via Roma, 94 - 27041 Casanova Lonati (PV) - Italy

Telephone
(+39) 0385.287.070 - 078

Fax
(+39) 0385.287.088

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