viking - pre-action system
DESCRIPTION
Pre-action system, supply by VikingTRANSCRIPT
Pre-Action Systems
Pre-Action Systems
Pre-action systems are fixed fireprotection systems with closedsprinkler heads.
The water supply is held backby a deluge valve, which is controlled by a release system.
When the release system operates,the deluge valve opens and waterdischarges from all open outletsconnected to the sprinkler piping.
Pre-Action Systems
The “Pre” part of pre-actionmeans that the release or the detection system is required to operate prior to the sprinklerson the sprinkler piping.
The idea of pre-action is that thedetection operates prior to thesprinkler system, allowing the water in the supply to be at or near the open sprinkler when the system operates.
Some pre-action systems only operateafter the sprinkler opens, meaning thedelay in water application would be theas a dry pipe system.
Pre-Action Systems
Pre-action systems are generally installed where there is a fear of water entering the sprinkler system or entering the space where the sprinklers are located.
Applications where pre-action systems are installed:
FreezersCoolersFlammable liquid storage (areas subject toFreezing)Computer RoomsRare Book StorageHistorical RecordsHistorical BuildingsGymnasium FloorsRecord Storage Areas
Deluge Valves
Deluge Valves
Deluge valves are used indeluge systems and pre-actionsystems.
Viking deluge valves haveone moving part, which isthe clapper.
Viking produces (2) styles ofdeluge valves, a straight through Model F-1 and anangle style, a Model E-1.Their operation is the same.
Both valves are listed andapproved for 250 psi.
Model EModel F
Model F-1 Deluge Valve-Replaceable Parts
Valve Body
Valve Seat
Clapper Seat Ring
Teflon Coated Clapper
Clapper Diaphragm
Clapper Diaphragm Clamp Ring Valve Cover
Model F-1 Deluge Valve
Priming Chamber
Inlet Chamber
Outlet Chamber
F-1 Deluge Valve Set-up
Water pressure providedto the priming chamberis supplied upstream of awater supply control valve.
Step #1: Place Priming Water in the Priming Chamber
F-1 Deluge Valve Set-up
Step #2: Open the water supplycontrol valve to bring water intothe inlet chamber.
This is the normal conditionfor a deluge valve. The outletchamber has only atmospheric pressure.
Valve OperationOnce the release system operates,water drains from the primingchamber, allowing the valve clapperto open. Water is directed from the inlet chamber to the outlet chamber
Outlet Chamber
Inlet Chamber
Priming Chamber
Valve OperationWater fills the discharge chamberand exits the valve and fills thesprinkler piping. Water dischargesfrom all open outlets connected to the sprinkler piping.
Water discharges throughsystem until water supplycontrol valve is closed.
Sprinkler HeadsAllowed to
Be Installed On Pre-Action Systems
Pre-Action System Releases
Dry Barrel Sprinkler
Upright Sprinkler
Horizontal SidewallSprinkler
Pre-Action System Releases
OR
Pre-Action System Releases
A pendent sprinkler installed on a return bend, where the sprinklerAnd the sprinkler line supplying it are in a heated area
Ceiling
Pre-Action System Releases
Pre-Action System Releases
Release SystemsPre-action systems use the same release systems as a Delugesystem. In many cases they use a combination of Deluge system release systems to create their interlock or mode of operating the Deluge valve.
Single Interlocked Pre-Action1. Pneumatic Release – Mechanical release2. Electric Release
Double Interlocked Pre-Action1. Electric/Pneumatic Release2. Electric/Pneu-lectric Release3. Pneumatic/Pneumatic Release – Mechanical Release
Single Interlocked Pre-Action System
Single Interlocked Pre-action Systems
Single Interlocked Pre-Action Systems
“Single” interlock means that it only takes one action to openthe deluge valve. For a single interlocked pre-action system, only the release system will open the delugevalve.
Air pressure is placed on the sprinkler piping as supervisory air pressure to ensure the piping network isnot open. Only the release system will operate the deluge valve. Operating a sprinkler head will only result in a “low air” alarm, or in other words, activating the “supervisory alarm”. There is no minimum supervisory air pressure for a single interlocked pre-action system.
Single Interlocked – ElectricRelease
The most prevalent single interlockedpre-action system. Activation requiresthat the electric release system poweropen the normally closed solenoidvalve only before the deluge valve opens.
Losing air only, will not allow thedeluge valve to open. This type of release is preferred when applying water to the fire quickly is required.
Single Interlocked Pre-ActionElectric Release
- Normal Position
Solenoid Closed.Panel in set position.
Priming Water fromPriming Chamber
Discharge to OpenDrain
Solenoid Open.panel in alarm, indicatingrelease system has operated.
Priming Water fromPriming Chamber
Priming water is exitingpriming chamber to open drainallowing deluge valve to open.
Single Interlocked Pre-ActionElectric Release
- Detection Activated
Single Interlocked – PneumaticRelease
This release is often chosen whereinstalling a mechanical release is desired. This system is used in lieuof a dry pipe system where a dry pipe system is not allowed due to the delay in water delivery.
Losing air only on the sprinkler piping, will not allow the deluge valve to open.Care must be taken in the design ofthe air supply to ensure that each airsupply has a dedicated air maintenancedevice.
From Air Supply
Priming Water fromPriming Chamber
To OpenDrain
Air pressure is commonto the release lineand the top of the pneumatic actuator. Once the release lineis pressurized, the pneumatic actuator isheld closed.
Single Interlocked Pre-ActionPneumatic Release
- Setting Pneumatic Actuator
Priming water is heldin the priming chamberbecause the pneumaticactuator is held closedwith air pressure fromthe release line.
Priming Water fromPriming Chamber
From Air Supply
To OpenDrain
Single Interlocked Pre-ActionPneumatic Release
- Release System (Normal Position)
To OpenDrain
Priming Water fromPriming Chamber
Release Line
Single Interlocked Pre-ActionPneumatic Release
- Release System (Activated)
Priming water from thepriming chamber of thedeluge valve dischargesfrom the pneumatic actuator when air is relieved from the releaseline.
Double Interlocked Pre-Action System
Double Interlocked Pre-action Systems
Double Interlocked Pre-Action Systems“Double” Interlock means that two actions have to occur beforethe Deluge valve will open. For a double interlocked pre-action system, the release system and air pressure has to be reduced on the sprinkler piping to open the Deluge valve. For a double Interlocked Pre-action System, the air pressure on the sprinklerpiping is used as supervisory air pressure and as a release system for the deluge valve. The minimum air pressure for a Double Interlocked Pre-action System is 7 psi.
For Double Interlocked Pre-action Systems, operating a sprinkler on the system will only result in a low air pressure alarm.Operating the release system on a double interlocked pre-action system will only result in a general alarm. It will take both to operate to open the Deluge valve and flow water into the system.
Refrigerated Area Sprinkler Systems
A Factory Mutual Reference for Double Interlocked Pre-Action. FM does not allow Double Interlocked
Pre-action installed anywhere other than freezers.
FREEZER AIR SUPPLIES
PER
NFPA 13 (2007 ed.)
Frost Plugs are created by moisture that is constantly being introducedby an air compressor. A means of preventing or eliminating moisturein the air supply to a system supplying a freezer can be a challenge.
OR
Freezer Air Supplies
A listed or approvedself contained air dryingsystem
Double Interlocked –Electric/Pneumatic Release
The most prevalent double interlockedpre-action system. Activation requiresthat the electric release system poweropen the normally closed solenoidvalve and air pressure be released from the sprinkler piping to openthe pneumatic actuator before the deluge valve opens.
Losing air only, or just the electricrelease operating will not allow thedeluge valve to open. This type of release is preferred when waterinadvertently entering the sprinkler piping must be avoided.
Electric/Pneumatic Release- Normal Position
Solenoid is closed. Release system isin set position
Pneumatic actuator is closed with airfrom sprinkler piping.
Priming Water fromPriming Chamber
Electric/Pneumatic Release- Electric Detection Activated
Solenoid is open. Release system hasactivated allowingprime water to advance to pneumaticactuator.
Priming Water fromPriming Chamber
Pneumatic actuator is closed with airfrom sprinkler piping.
Electric/Pneumatic Release- Electric Detection and Sprinkler
have operated
Solenoid is open. Release system hasactivated allowingprime water to advance to pneumaticactuator.
Priming Water fromPriming Chamber
Pneumatic actuator is open when air pressure is reducedon sprinkler system.
Priming water is exitingpriming chamber to open drainallowing deluge valve to open.
Double Interlocked – Electric/PneulectricRelease
A double interlocked system thatcross zones the electric detectionin the hazard area and the supervisoryair pressure switch. Both devicesmust activate before a cross zoneis completed at the release controlpanel.
If only the detection activates, or ifonly the supervisory switch activates,the deluge valve will not open.
This type of double interlocked pre-actionis sometimes chosen to lower the requiredair pressure on the sprinkler piping.
Double Interlocked Pre-ActionElectric/Pneulectric Release
- Normal Position
Solenoid Closed.Panel in set position.
Priming Water fromPriming Chamber
Double Interlocked Pre-ActionElectric/Pneulectric Release
- Detection Activated
Priming Water fromPriming Chamber
Solenoid Closed.Panel in alarm, indicatingZone #1 has activated.
Double Interlocked Pre-ActionElectric/Pneulectric Release
- Detection and Supervisory Switch Activated
Solenoid Open.Panel in alarm, indicatingZone #1 and Zone #2 have activated completingcross zone.
Priming Water fromPriming Chamber
Priming water is exitingpriming chamber to open drainallowing deluge valve to open.
Double Interlocked –Pneumatic/Pneumatic Release
This double interlocked releaseis a mechanical release. Twopneumatic actuators are placedin series. A pneumatic releasesystem is installed in the hazardarea and controls the first pneumatic actuator. The secondpneumatic actuator is connectedto the sprinkler piping and iscontrolled by the air placed on thesystem piping.
Double Interlocked –Pneumatic/Pneumatic Release
Activation of this system occurswhen the release system operates,allowing priming water to advanceto the pneumatic actuator controlledby the air in the sprinkler piping. Whenair pressure is reduced in the sprinklerpiping, the second pneumatic actuatoropens, draining priming water pressurefrom the priming chamber allowing thedeluge valve to open and flow water intothe sprinkler piping.
Operation of only one pneumatic actuatorwill not allow the deluge valve to open.
Double Interlocked Pre-actionPneumatic/Pneumatic Release
- Set Position
Priming Water fromPriming Chamber
Air Pressure on Release System, Closing PneumaticActuator #1
Air Pressure on Sprinkler System, Closing PneumaticActuator #2
Note: The space between the Pneumatic actuators is primed withWater to prevent pre-mature operation
Double Interlocked Pre-actionPneumatic/Pneumatic Release
- Release System Operates
Priming Water fromPriming Chamber
Air Pressure removed from Release System, Opening PneumaticActuator #1
Air Pressure on Sprinkler System, Closing PneumaticActuator #2
Air Pressure removed from Release System, Opening PneumaticActuator #1
Air Pressure removed fromSprinkler System, Opening Pneumatic Actuator #2
Priming Water fromPriming Chamber
Priming water is exitingpriming chamber to open drainallowing deluge valve to open.
Double Interlocked Pre-actionPneumatic/Pneumatic Release
- Release System and Sprinkler Operates
Packaged Trim and System Options
TrimPac
TrimPac is a trim offering that includes the release devicesfor either deluge or pre-action systems. One TrimPac will service any size valve. A TrimPac can either be mounted on the wall or to the riser. For a riser mounted TrimPac, a mounting kit is required.
TrimPac Drain Trim
A TrimPac can be used with any size deluge valve, but, the valve size is required to order the drain package. The drain package is installed on the valve and hoses from the TrimPac are installed on outlets located on the valve trim and the priming connection on the supply side of the control valve.
TrimPac Drain Package – Model E-1 Deluge Valve
TrimPac Drain Package – In-line Valve vertical installation
TrimPac Drain Package – In-line Valve horizontal installation
SureFire
Fail Safe Pre-action
SureFire Pre-action Systems
SureFire Pre-action systems are “power failure safe” electric releasepre-action systems.
The release module is the same for both single and double interlockedpre-action. The release module consists of a normally closed solenoid valve,a normally closed solenoid valve, and a pneumatic actuator.
During normal power conditions, the normally closed solenoid valve is powered open by the release control panel when the release system(s) operate.
The normally open solenoid valve is installed in series with the pneumaticactuator. The pneumatic actuator is held closed with the air pressure on thesprinkler piping. In normal power conditions, if a loss of air occurs on the system, the normally open solenoid valve is powered closed by the release control panel.
Sure Fire Pre-action Systems
Available in TrimPac
SureFire – TrimPac Completed Assembly
SureFire TrimPacTrim View
Release Module
Supervisory AirPressure Switch
SureFire – Release Set
Priming Water From Deluge Valve
Air Pressure On SprinklerPiping
Normally Closed Solenoid Valve
Normally OpenSolenoid Valve
Pneumatic Actuator
SureFire – Release Activated (Normal Power)
Normally OpenSolenoid Valve Air Pressure
On SprinklerPiping
Pneumatic Actuator
Priming Water From Deluge Valve
Normally Closed Solenoid Valve-Powered Open by Release ControlPanel
SureFire Release- Normal PowerLoss Of Air – Release Not Activated
Normally OpenSolenoid Valve(Powered ClosedBy Release Control Panel)
Air Pressure Removed fromSprinkler piping
Pneumatic Actuator
Normally Closed Solenoid ValvePriming Water
From Deluge Valve
SureFire Release ModuleLoss of AC and DC Power –
Sprinkler Opens on Sprinkler Piping
Normally OpenSolenoid Valve(Priming waterflows throughvalve)
Air Pressure Removed fromSprinkler piping
Pneumatic Actuator
Normally Closed Solenoid ValvePriming Water
From Deluge Valve
Sure Fire Pre-action SystemsRe-set Instructions
1. Close water supply controlvalve.2. Drain down sprinkler system3. Open auxiliary drain valve4. Close drains5. Re-establish Air pressure onsprinkler piping.6. Reset release system7. Open water supply controlvalve.
Note: System will not re-set without establishing air pressure onsystem piping first.
Trim Mounted to the Valve
A valve from Viking can be ordered with thetrim assembled on the valve by the factory.Some system options only leave Viking in pre-trimmed offerings.
Pre-Trimmed Valves
Model G4000-P1 – Single Interlocked Pre-Action – Electric
Release
Model G4000-P1 – Double Interlocked Pre-Action –
Electric/Pneumatic Release
Model G4000-P1 – Single/Double Interlocked Pre-Action – SureFire
Release
TotalPac 2
TotalPac 2 is a product line that integrates the deluge or pre-action riser assembly. In general, the only thing a contractor must install is a water supply to the TotalPac 2, andconnecting piping to the sprinkler system.
Integrated Systems
TOTAL PAC 2
Integrated Systems
Basic Skid:14 ga. steel baseManifolds on inlet &
drainButterfly valveSystem main valvePre-assembled trim
Basic Skid:14 ga. steel baseManifolds on inlet &
drainButterfly valveSystem main valvePre-assembled trim
Integrated Systems
Basic skid w/enclosure:- No control panel- Factory wired to field junction box- SerializedTwin door design
Dimensions:57" x 36" x 20" for 1½“ to 3" units57" x 46" x 20" for 4" to 8" units
Basic skid w/enclosure:- No control panel- Factory wired to field junction box- SerializedTwin door design
Dimensions:57" x 36" x 20" for 1½“ to 3" units57" x 46" x 20" for 4" to 8" units
Remote Controlled Units
Integrated Systems
Complete system:
– Control Panel– Pre-wired to wiring terminal– Listed & Approved– Serialized
Complete system:
– Control Panel– Pre-wired to wiring terminal– Listed & Approved– Serialized
Self Contained Units
Integrated Systems
Control section:
– Emergency batteries compartment– Contractor’s wiring terminals– Air compressor isolation switch
Control section:
– Emergency batteries compartment– Contractor’s wiring terminals– Air compressor isolation switch
Self-contained unitsSelf-contained units
Integrated Systems
Types of Releases:
- Hydraulic- Pneumatic- Electric- Firecycle III- Sure-Fire
Types of Releases:
- Hydraulic- Pneumatic- Electric- Firecycle III- Sure-Fire
Product featuresProduct features
Integrated Systems
Cycling Pre-action
Firecycle lll
Cycling Systems
Cycling Pre-Action Systemsoperate in the same manneras conventional pre-action systems, with the ability tocycle off when the fire isextinguished.
Cycling Systems
The ability for the system to cycle off is provided by the use of a flow control valve in the riser in lieu of a deluge valve.
Standard pre-action trim is deluge trim that is designed for the systemto activate and require manual system closure and resetting.
The flow control valve allows for thesystem to re-set once the releasesystem has reset.
The system will cycle ON-OFF as many times as necessary to extinguishthe fire.
Cycling Systems
Cycling systems utilize a detection or release system of closed loop heat detection devices. Available options are for exposed installations, and finished ceiling installations. The detection loop wire is required to be 2 hour rated FPL wire.
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