Quenchmaster Class a Foam System Ppt_1

Class A Foam

Edition 1 May 2009

Quenchmaster Around the PumpQuenchmaster Around the Pump

Class A Foam Proportioning SystemClass A Foam Proportioning System

Edition 1 May 2009Slide – 2

Quenchmaster Class A Foam Proportioning SystemQuenchmaster Class A Foam Proportioning System

Quenchmaster Around the Pump

Class A Foam Proportioning SystemClass A Foam Proportioning System


The Quenchmaster foam system is designed to proportion Class A foam only

It must be operated between 600 – 1000 kPa

Flow rates range between 200 – 400 Lpm

Proportioning is between 0.1% and 1%.

The proportioner has six setting positions

Off, 0.01%, 0.25%, 0.50%, 0.75%, 1.00%.

The system is also fitted with an automatic water flush mode.

Quenchmaster Class A Foam System Operation


Quenchmaster Schematic

Pump Suction InletPump Suction Inlet

Pump Pump DischargeDischarge

20Lt

Pump By-Pass to Pump By-Pass to Appliance Water Appliance Water

TankTank

Foam Concentrate

Main Pump

Foam Inlet

Foam Proportioning Foam Proportioning ValveValve

Inductor Drive Water


Quenchmaster System ControlsQuenchmaster System Controls

Foam Proportioning ValveFoam Proportioning Valve

Turns the system on and offTurns the system on and off

Automatically activates the flush mode when Automatically activates the flush mode when proportioning is complete and the system is proportioning is complete and the system is turned to the turned to the OffOff position position

Controls the proportioning rate of Class A foam Controls the proportioning rate of Class A foam concentrateconcentrate

Class A Foam ValveClass A Foam Valve

Controls water flow from pump discharge to Controls water flow from pump discharge to eithereither

Pump by-passPump by-pass

Foam inductorFoam inductor


To Supply FoamTo Supply Foam

Ensure adequate supply of foam concentrate.Ensure adequate supply of foam concentrate.

Start pump and set pressure between 600 & 1000 kPa Start pump and set pressure between 600 & 1000 kPa (Optimum 700 kPa )(Optimum 700 kPa ) DO NOT EXCEED 1000 kPa.DO NOT EXCEED 1000 kPa.

Open branch to provide water flow through the pump and foam Open branch to provide water flow through the pump and foam proportionerproportioner

Ensure tank fill valve is Ensure tank fill valve is closedclosed ( Do not open during foam use ) ( Do not open during foam use )

The Red indicator will be on the drive water solenoid will be On The Red indicator will be on the drive water solenoid will be On for the entire duration of foam productionfor the entire duration of foam production

Foam solution will circulate around the pump for foam deliveryFoam solution will circulate around the pump for foam delivery


Producing Class A Foam When BoostingProducing Class A Foam When Boosting

As the “Quenchmaster” proportioning system is As the “Quenchmaster” proportioning system is a round the pump proportioner, any back a round the pump proportioner, any back pressure on the inductor will prevent foam pressure on the inductor will prevent foam production.production.

In the event that class A foam is required to be In the event that class A foam is required to be produced when the appliance is boosting, the produced when the appliance is boosting, the following procedure must be followed.following procedure must be followed.

Once water is being delivered to the branch, the pump inlet will need to be gated so as the pump inlet gauge reads as close to 0 as possible. ( This will ensure that there is no back pressure on the inductor )

Adjustments to the pump throttle will have to be made to maintain required pressure.


To Shut Down FoamTo Shut Down Foam

► With foam discharging from the branch, set the “Quenchmaster” foam percentage valve to the Off position.

► Red indicator light will turn off and the orange flush indicator light will illuminate.

► Flush the remaining water foam solution through the hoses

until clear water is showing at the branch.

► Close branch and delivery lines.

► Move the Class A foam valve to the foam “off” position.

► Flush appliance reticulation system and all outlets ( including front sprays ) until clear water is observed.

► Once appliance reticulation system has been flushed, operate the crew protection spray system in order to flush any foam solution out.


SystemSystem Operating InformationOperating Information

Every time the pump ignition is turned on the drive Every time the pump ignition is turned on the drive water solenoid will open allowing water to flush and water solenoid will open allowing water to flush and lubricate the systemlubricate the system

Ensure the foam proportioning valve is turned OffEnsure the foam proportioning valve is turned Off

If foam enteres the appliance water tank during If foam enteres the appliance water tank during firefighting / training operations, flush the water tank firefighting / training operations, flush the water tank until free of foam.until free of foam.


Foam Injection Point On Pump InletFoam Injection Point On Pump Inlet

Pump By-Pass LinePump By-Pass Line

Foam & Water ConnectionsFoam & Water Connections



Foam Injection Point on Pump InletFoam Injection Point on Pump Inlet

Class A Foam Valve Water SupplyClass A Foam Valve Water Supply



Foam Concentrate Drum RackFoam Concentrate Drum Rack

Foam concentrate is stored in 20 litre carboys located in a slide out carrier under the appliance.

A pick-up tube delivers foam concentrate from the carboys to the inductor.


During foam production/use the During foam production/use the tank fill valve tank fill valve mustmust remain remain closedclosed

If this valve is opened during If this valve is opened during foam use contamination of the foam use contamination of the water tank will occurwater tank will occur

Tank Fill ValveTank Fill Valve


Pump CoolingPump Cooling

When the class A foam valve is in the When the class A foam valve is in the “foam off” position, water is circulated “foam off” position, water is circulated back to the water tank therefore back to the water tank therefore providing pump cooling capacity. providing pump cooling capacity.

When the class A foam valve is in the When the class A foam valve is in the “on position”, the pump by-pass line is “on position”, the pump by-pass line is closed and the water is diverted to the closed and the water is diverted to the foam inductor. foam inductor.

In this position there is no pump In this position there is no pump cooling capacitycooling capacity

Quenchmaster Class a Foam System Ppt_1

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