Water Handling Operations

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Presentation transcript:

Water Handling Operations Unit 4C - Foam and Foam Proportioning Equipment

Objectives Discuss why foam is more effective than plain water when performing wildland fire suppression operations. Discuss foam safety including guidelines for handling foam products. Identify and discuss the advantages and disadvantages of two manual foam proportioning methods used when performing wildland fire suppression operations.

Objectives Identify various operational components of the Foam Pro 1600/1601. Demonstrate the ability to set up, run, have foam solution pumped to a nozzle person, and shut down a foam proportioner.

Foam Proportioners

Manual Foam Proportioners Operators manually adjust the device to maintain a constant mix ratio when water flow and pressure changes. Cannot maintain constant mix ratio over various flow and pressure rates

Batch Mixing

Suction Side Foam Proportioners

Automatic Foam Proportioner The automatic foam proportioner makes an adjustment on its own to maintain a constant mix ratio when water flow and pressure changes.

Foam Pro 1601 Electronic Direct Injection Foam Proportioner s

Foam Pro 1601 Proportional and automatic Works on discharge side of pump Class A foam only Requires water flow and electrical current No restrictions due to hose length or number of nozzles No loss of pressure or flow Accurate at all flow ranges Resupply foam without interruption

Robwen Flow Mix Balanced Pressure Bladder Foam Proportioner Three-way Valve Concentrate Fill Line Pressure Tank with Bladder Water Dump Line Foam Concentrate Metering Valve Check Valve Water Pump Modified Venturi/ Pressure Differential Valve

Robwen Flow Mix Portable Unit

Robwen Flow Mix Fixed Mount

Robwen Flow Mix Proportional and automatic Works on discharge side of pump Uses Class A or B foam Requires only water flow to operate No restrictions do to hose length or number of nozzles Some loss of pressure or flow Accurate at all flow ranges Cannot resupply foam without interruption

Operating the Foam Pro 1601 (Major Components) Operator control module Motor driver box/module Paddlewheel flowmeter Foam pump and electric motor Calibrate/Inject valve Inline strainer

Operator Control Module (Panel Mounted) Operating instructions On/Off switch Injection rate control Adjustable from 0.1%-1.0% Low concentrate (“LOW CONC.”) light

Motor Driver Box/Module (Normal Operation) Simulated flow switch “Down” for normal operation Circuit breaker switch “Up” for normal operation

Paddlewheel Flowmeter

Foam Pump and Electric Motor

Calibrate/Inject Valve

Purging Air Enter “Simulated Flow” Valve to “Cal/Flush” Switch to “Up” position Preprogrammed for 100 gpm Valve to “Cal/Flush” Turn panel switch “On” Run pump until concentrate flows from dump line

Purging Air (Continued) Turn control panel to “Off” position Return valve to “Inject” Exit “Simulated Flow” by returning switch to “Down” position

Inline Strainer

Foam Injection Check Valve and Injection Port

Objectives Discuss why foam is more effective than plain water when performing wildland fire suppression operations. Discuss foam safety including guidelines for handling foam products. Identify and discuss the advantages and disadvantages of two manual foam proportioning methods used when performing wildland fire suppression operations.

Objectives Identify various operational components of the Foam Pro 1600/1601. Demonstrate the ability to set up, run, have foam solution pumped to a nozzle person, and shut down a foam proportioner.

Vehicle Fire Case Study