DELUGE PRESSURE REDUCING MODEL 68 DE HRV PR-MR
Hydraulically Actuated, Anti-Columning, Pressure Reducing, Manual Reset Deluge Valve
Hydraulically 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 hydraulic pressure drops in a 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 fresh water, seawater & foam
Out of box fully assembled & tested valves
Extensive valve & trim materials selection and corrosion protection coating
Factory trimmed for vertical & horizontal installations without modiﬁcation
CERTIFICATION & COMPLIANCE
• 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
Automatic or Manual Actuated Fire Suppression Systems
Petrochemical, Oil & Gas Installations
Power Generation, Transformer & Transmission Plants
Hangars & Airport Terminals
Onshore / Offshore
The basic control valve  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 , a Y-Type strainer , a check valve  and a T-restrictor .
Under fire conditions, one (or more) of the automatic sprinklers on the wet (hydruallically-pressurized) pilot line burst. The pressure in the relay valve  drops, causing it to open and allowing the water to begin to drain the deluge valve’s control chamber through the pressure reducing pilot .
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 . 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 (latching manual reset device)  isolates the relay valve the upstream pressure source. Reconnecting the upstream pressure to enable the deluge valve to close can only be achieved by pressing the DMR’s knob.
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