Husky 60

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Husky 60

  1. 1. Foam Team Training Series “ Husky 60 Foam System”
  2. 2. Introduction <ul><li>The Husky 60 Foam Proportioning system is a demand system using a balanced pressure principal. </li></ul><ul><li>This means that the foam concentrate pressure is automatically regulated to be equal to the water pressure by controlling the foam proportional output. </li></ul><ul><li>Each output that is foam capable has its own proportioner. </li></ul>
  3. 3. Introduction <ul><li>The foam concentrate is pulled from the foam tank by the foam pump and discharged to the metering valve that has been activated. </li></ul><ul><li>The automatic system is maintained by the output of the hydrostatic pump which is run directly off of the water pump. </li></ul>
  4. 4. Important Numbers <ul><li>The MAX pressure for this system is 250 psi. </li></ul><ul><li>Being a Husky 60 means that this Foam concentrate pump will have a max output of 60 gallons per min. (Foam concentrate) </li></ul>
  5. 5. 3% Operation <ul><li>At 3% operation: </li></ul><ul><ul><li>We can flow 2000* total gpm: </li></ul></ul><ul><ul><ul><li>1940 gpm of water </li></ul></ul></ul><ul><ul><ul><li>60 gpm of foam concentrate </li></ul></ul></ul><ul><li>*E-1 is only rated at 1750, however you might get close to 2000 based on previous pump tests with a good water supply. </li></ul>
  6. 6. 6% Operation <ul><li>At 6% Operation: </li></ul><ul><ul><li>1000 gpm </li></ul></ul><ul><ul><ul><li>940 gpm water </li></ul></ul></ul><ul><ul><ul><li>60 gpm foam concentrate </li></ul></ul></ul>
  7. 7. Compatibility <ul><li>The Husky Foam system is compatible with all known Class B and Class A foam concentrates but it should not be mixed without thoroughly cleaning out the system. </li></ul>
  8. 8. Manual Override Selector Valve <ul><li>This valve should normally be set to auto </li></ul><ul><li>This two function valve determines the operating mode of the proportioning system. </li></ul><ul><ul><li>Automatic – System will automatically balance foam concentrate pressure to water pressure </li></ul></ul><ul><ul><li>Manual – System will respond to operator adjustment of the manual control valve </li></ul></ul>
  9. 9. Manual Override Control Valve <ul><li>Normally backed out to zero (Fully counter-clockwise) </li></ul><ul><li>This is only operational when the selector valve is in manual mode. </li></ul><ul><li>Manual operation of this valve determines the pressure of the foam concentrate pump. </li></ul>
  10. 10. Foam Concentrate Tank <ul><li>The foam tank is designed to store all types of foam concentrate. </li></ul><ul><li>Design features typically include: </li></ul><ul><ul><li>1” drain valve </li></ul></ul><ul><ul><li>Expansion dome with a locking fill hatch and pressure vacuum vent </li></ul></ul><ul><ul><ul><li>The dome allows for changes in atmospheric pressure and temperature </li></ul></ul></ul>
  11. 11. Foam Concentrate Tank <ul><li>Foam tank levels must be maintained at the half-full mark in the expansion dome at all times to reduce the air to foam interaction </li></ul><ul><li>The pressure vacuum vent helps to regulate the atmospheric pressures during normal, suction and filling operations. </li></ul>
  12. 12. Foam Concentrate Tank Shut-Off <ul><li>This valve should always be off unless calling for foam concentrate </li></ul>
  13. 13. Foam Concentrate Pump <ul><li>The foam concentrate pump is a positive displacement rotary gear self-priming pump driven by the water pump. </li></ul><ul><li>The foam concentrate pump is operational only when the water pump is engaged. </li></ul><ul><li>The pump can be stored “dry” or “wet” </li></ul>
  14. 14. Duplex Pressure Gauge <ul><li>Located on the pump panel, the gauge indicates the foam concentrate pressure (red needle) and the water pressure (black needle) simultaneously. </li></ul><ul><li>When both needles indicate the same pressure then the system is balanced and functioning normally. </li></ul>
  15. 15. External Foam Pick-up Connection <ul><li>A quarter turn ball valve is located on the pump panel to pick-up additional foam concentrate as needed. </li></ul>
  16. 16. Normal Standby Mode <ul><li>Manual override selector – automatic </li></ul><ul><li>On/Off selector – Off </li></ul><ul><li>Tank B Control Valve – Closed </li></ul><ul><li>Metering/Shutoff Valves – Closed </li></ul><ul><li>Manual Override Control valve – Zero (Fully counter-clockwise) </li></ul>
  17. 17. Normal Foam Operation <ul><li>Manual override selector – automatic </li></ul><ul><li>On/Off selector – On </li></ul><ul><li>Tank B Control Valve – Open </li></ul><ul><li>Metering/Shutoff Valves – Desired % </li></ul><ul><li>Manual Override Control valve - Zero </li></ul>
  18. 18. Foam Tank Filling Instructions <ul><li>Park the vehicle on a level surface </li></ul><ul><li>When filling manually into the expansion dome hatch, use a fill tube that can reach down to the bottom of the tank to prevent any aeration. </li></ul><ul><li>Pour the concentrate down the center of the round fill tube, this tube allows the concentrate to fill beneath the surface of the foam to reduce aeration. </li></ul>
  19. 19. Filling using the foam pump <ul><li>Connect the external foam pickup tube to the external foam supply </li></ul><ul><li>Open the ball valve </li></ul><ul><li>Place the Manual override selector valve in the manual position </li></ul><ul><li>Ensure that the pressure regulating valve is fully backed out </li></ul><ul><li>Engage the water pump </li></ul>
  20. 20. Filling using the foam pump <ul><li>Adjust the foam pump speed using the pressure regulator valve </li></ul><ul><li>Slowly partially open the foam tank fill valve </li></ul><ul><li>Have a spotter on top watching the fill dome as it fills. DO NOT fill too fast, and when concentrate starts to enter the dome stop the fill procedure. </li></ul>
  21. 21. Filling using the foam pump <ul><li>When the tank is full, turn the pressure regulation valve fully out (counter-clockwise) </li></ul><ul><li>Place the manual override selector valve back into the automatic position. </li></ul><ul><li>Disengage the water pump. </li></ul>
  22. 22. Starting a Foam Operation <ul><li>Connect to a water supply </li></ul><ul><li>Place the desired foam tank selector switch in the open position </li></ul><ul><li>Turn the foam system on </li></ul><ul><li>Open the metering shutoff valve where foam is desired, turning the selector past the desired setting and then back. </li></ul><ul><li>Increase engine speed to desired pressure. </li></ul>
  23. 23. Stopping Foam Operations <ul><li>Close the metering valves </li></ul><ul><li>Decrease engine speed/pressure </li></ul><ul><li>Turn the system off </li></ul><ul><li>Allow the lines to continue to flow until they run clear. </li></ul><ul><li>Close the foam concentrate supply valves to the foam pump </li></ul><ul><li>Open the minor flush and discharge flush valves to flush out the downstream side of the metering valves </li></ul>
  24. 24. Stopping Foam Operations <ul><li>Refill the foam concentrate storage tank to the one-half full level in the expansion dome. </li></ul><ul><li>Return all valves and switches to their normal stand-by positions </li></ul>
  25. 25. Manual Mode <ul><li>Should the auto-balancing system fail take the following steps: </li></ul><ul><ul><li>Turn the Husky manual override selector valve to the manual position </li></ul></ul><ul><ul><li>Set the pump discharge to the desired pressure </li></ul></ul><ul><ul><li>Open the desired metering valve to the required percentage </li></ul></ul>
  26. 26. Manual Mode <ul><ul><li>Increase the foam concentrate pressure by rotating the manual override control knob clock-wise until the red and black needle align </li></ul></ul><ul><ul><li>As additional lines are opened, the manual override may have to be adjusted to maintain the proper balance </li></ul></ul>
  27. 27. Foam Operation from an external source <ul><li>Locate the supply near the pump panel ensuring that you have sufficient quantity to not run the pump dry </li></ul><ul><li>Connect the pick up tube and insert into the foam supply </li></ul><ul><li>Open the external concentrate valve </li></ul><ul><li>Turn the foam tank selector off </li></ul><ul><li>Ensure the foam tank fill valve is closed </li></ul>
  28. 28. Foam Operation from an external source <ul><li>If foam was not flowing using the onboard tank reverse 3 and 4 </li></ul><ul><li>If cavitation of the foam pump occurs, open the foam pump drain valve to evacuate the air, allow the pump to prime then close the valve. </li></ul>
  29. 29. Periodic Operation <ul><li>The foam pump should be operated on a routine basis to ensure the system is ready to go </li></ul><ul><li>The two acceptable methods of operating the foam pump is: </li></ul><ul><ul><li>Actual foam operation utilizing normal flow procedures </li></ul></ul><ul><ul><li>Operating in manual mode with all metering valves closed </li></ul></ul>
  30. 30. Periodic Operation <ul><li>Manual mode testing </li></ul><ul><ul><li>Place the pump in gear </li></ul></ul><ul><ul><li>Switch the manual override selector valve into manual mode </li></ul></ul><ul><ul><li>Verify that the foam concentrate tank supply valve for the primary agent is open </li></ul></ul><ul><ul><li>With all metering valves closed make sure the Husky is OFF </li></ul></ul><ul><ul><li>Slowly increase the foam pressure to about 50 psi as shown on the red needle using the manual override control valve </li></ul></ul>
  31. 31. Periodic Operation <ul><ul><li>Allow the system to run for no longer than 40 seconds </li></ul></ul><ul><ul><li>De activate the Husky system, shutdown the water pump and truck returning the manual override selector to their normal standby position </li></ul></ul>

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