PRE ACTION MODEL 68 DE EL PORV-DN

Product code: 68 DE EL PORV-DN

Double-Interlock Pre-Action, Electro-Pneumatic Release System

Electrically and pneumatically, pilot controlled, double-interlock pre-action valve, actuated by the pipeline pressure. The valve is closed inits normal, set position and opens when the pressure drops in a gas pressurized supervisory pilot line, sensed by the relay valve, and the solenoid valve is energized. An emergency manual release valve is fitted as standard.

Zalo

Consulting hotline: 0944934114
Product information

FEATURES & BENEFITS

High pressure (PN25/375psi), high flow systems

Automatic or manual emergency actuation

Industrial & commercial fire suppression

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

PRE ACTION MODEL 68 DE EL PORV-DN

• 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 Register & ABS approvals

TYPICAL APPLICATIONS

Machine Rooms

Cold Storage Protected Areas

High Rise Buildings & Offices

Power Plants

Archives, Museums, Libraries & Water Sensitive Depots

OPERATION

The basic control valve [1] used in this pre-action system is a direct-sealing elastomeric diaphragm, hydraulically operated control valve engineered specifically for fire protection systems.

In the standby position, the pre-action 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].

  The pre-action valve opens automatically when both conditions below occur simultaneously:

1. A fire alarm control panel (F&G panel) energizes the 2/2-way N.C. solenoid [10] (or de-energizes the coil of a continuously energized ED 100% normally open solenoid for SIL 3-4 rated systems).

2. The pressure in the dry (pneumatically-pressurized) automatic sprinkler line drops, following bursting of one (or more) of the automatic sprinklers.

When both conditions occur, water is drained the pre-action valve’s control chamber through the 2/2-way N.C. solenoid. The valve opens instantly allowing water to flow the pipeline, through the open sprinklers and over the protected area. Pressure switches on the valve’s downstream port [11] and the check valve’s downstream port [12] provide electrical indication to the fire alarm control panel of rising water pressure (the valve has opened) and drop in air (or gas) pressure (one or more sprinklers have burst).

Manual emergency actuation is enabled by opening the emergency manual activation valve [6]. Thepre-action valve opens instantly and allows water to flow the pipeline and through the open sprinklers over the protected area.

PRE ACTION MODEL 68 DE EL PORV-DN

TYPICAL MATERIALS

PRE ACTION MODEL 68 DE EL PORV-DN

1) 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

(2) Consult factory

PRE ACTION MODEL 68 DE EL PORV-DN

 

 

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