Pneumatically Actuated Deluge Valve MODEL 68 DE PORV
Pneumatically actuated, pilot controlled deluge/pre-action valve, actuated by the pipeline pressure. The valve is closed in its normal, set position and opens when the pneumatic pressure drops in a gas pressurized pilot line, tripping a hydraulic relay. An emergency manual release valve is fitted as standard.
FEATURES & BENEFITS
High pressure (PN25/375psi), high flow deluge systems
Automatic or manual emergency actuation
Hazardous, flammable & explosion classified area fire suppression
Superior design featuring exceptionally low pressure losses at high flow rates
Low lifelong maintenance costs due to straightforward design
Applicable for fresh or brackish water, seawater & foam
Out of box fully assembled & tested valves
Factory trimmed for vertical or horizontal installations without modification
Extensive valve & trim materials selection and corrosion protection coating
CERTIFICATION & COMPLIANCE
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• ANSI FCI 70-2 Class VI seat leakage class
• UL listed under VLFT category
• Fire tested to EN ISO 6182-5:2006 (2”- 6” only)
• Lloyd’s & ABS approvals
TYPICAL APPLICATIONS
Automatic or Manual Actuated Fire Suppression Systems
Petrochemical, Oil & Gas Installations
Tunnels
Power Generation, Transformer & Transmission Plants
Flammable Storage
Hangars & Airport Terminals
Onshore / Offshore
Mining
OPERATION
The basic control valve [1] used in this deluge system is a direct sealing elastomeric diaphragm, hydraulically operated control valve engineered specifically for fire protection systems.
In the standby position, the deluge valve is held closed by the upstream water pressure, trapped in the valve’s control chamber. The water pressure enters the control chamber through the priming line ball valve [2], a Y-type strainer [3], a check valve [4] and a T-restrictor [5].
Under fire conditions, one (or more) of the automatic sprinklers on the dry (pneumatically pressurized) pilot line burst. The pressure in the relay valve [9] drops, causing it to open and allowing the water to drain the deluge valve’s control chamber. The deluge valve opens instantly and allows water to flow the pipeline and through the open sprinklers over the protected area.
Manual emergency actuation is enabled by opening the emergency manual activation valve [6]. The deluge valve opens instantly and allows water to flow the pipeline and through the open sprinklers over the protected area.
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TYPICAL MATERIALS
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TECHNICAL DATA
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ENGINEERING SPECIFICATIONS
The deluge valve shall be hydraulically operated, direct elastomeric diaphragm-seal, single chamber weir type. The valve shall consist of three major components: the body, the cover and the diaphragm assembly. The diaphragm assembly shall be the only moving part. The diaphragm forms a sealed control chamber in the upper portion of the valve, separating operating pressure line pressure. Packing glands, stuffing boxes and dynamic O-ring seals are not permitted and there shall not be shafts, discs, bearings or pistons operating the valve. No hourglass shaped disc retainers shall be permitted, and no V-type, U-type or other slotted type disc guides shall be used. The valve shall contain a nylon reinforced rubber diaphragm, elastic & resilient through its entire surface without vulcanized radial seals and/or reinforcements. The diaphragm assembly shall not be guided by any shafts or bearings and shall not be in close contact with other valve parts except for its sealing surface. The deluge valve shall be fully trimmed, hydrostatically and operationally tested at the factory. Maintenance, disassembly and reassembly of all the valve’s components shall be made possible on-site and in-line, without the need to remove the valve the line. Main valve body and bonnet standard material shall be Ductile Iron or Cast Steel. Main valve body and bonnet surfaces shall include a fire red epoxy coating. Other materials and coatings available upon request. The deluge valve shall be a Model 68 DEPORV, UL Listed under VLFT category, as manufactured by OCV Fluid Solutions, Tulsa, OK, USA.
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