DELUGE PRESSURE REDUCING MODEL 68 DE PORV PR-MR
Pneumatically Actuated, Pressure Reducing, Manual Reset Deluge Valve, 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. When tripped, the valve regulates to a steady, preset downstream pressure, regardless of upstream pressure or flow rate fluctuations. The valve must be manually reset following automatic actuation. 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 water, seawater & foam
Out of box fully assembled & tested valves
Factory trimmed for vertical & 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
• Fire tested to EN ISO 6182-5:2006 (2”- 6” only)
• UL listed under VLFT category
• 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 begin to drain the deluge valve’s control chamber through the pressure reducing pilot [10]. The deluge valve opens instantly, regulating to a steady, preset downstream pressure, regardless of upstream pressure or flow rate fluctuations. This 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]. When connected through the pressure reducing pilot (upon request), manual actuation causes the deluge valve to regulate the downstream pressure regardless of upstream pressure or flow rate fluctuations If unspecified, the manual activation valve drains the water to the atmosphere, allowing the deluge valve to open fully. When actuated, the deluge valve opens instantly and allows water to flow the pipeline and through the open sprinklers over the protected area.
When the valve trips open, the DMR (manual reset latching device) [11] isolates the relay valve the supervisory pressure source. Reconnecting the supervisory pressure to enable the deluge valve to close can only be achieved by pressing the DMR’s knob.
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TYPICAL MATERIALS
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(1) Petrochemical, Oil & Gas
(2) Refer to materials selection guidelines, Engineering Data - Materials: Ductile Iron A-536 65-45-12; Cast Steel A-216 WCB; Cast Steel A-352 LCB; Austenitic
Stainless Steel A-351/CF8M; Super Duplex 2507; Nickel-Aluminum-Bronze B-148 UNS C95800
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