* Drafting Sequence Flashcards

1
Q

Procedure for setting up to draft?

A
  1. Remove any Intake Valves (Keystone)
  2. Connect Hard Suction to intake (Keystone) and Use Rubber Mallet to Insure Air Tight Connections
  3. Close ALL valves & drains except intake being used
  4. Place in pump
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2
Q

If I am drafting from a natural water source what do I need to do?

A

Use Rope to Keep Strainer off Bottom (natural water sources only)
24” Above Bottom
24” Below Surface

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3
Q

Procedure for drafting?

A
  1. Keep in throttle mode
  2. Increase throttle to between 1000-12000 RPM
  3. Activate priming pump for 30-45 seconds (if a prime has not been achieved in this time period, the priming attempt should be stopped & problem traced)
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4
Q

What should you be watching to make sure a draft is successful?

A
  1. Listen for change in sound
  2. Look for water discharge from priming pump under truck
  3. Watch discharge pressure gauge
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5
Q

Once I have achieved the draft what do I do?

A
  1. Immediately, but slowly open the discharge (any discharge, even just a dump line or the tank fill) & set the correct pump pressure
  2. Ensure prime is not lost by ensuring that water is moving through the pump
  3. Switch from throttle to pressure
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6
Q

If I fail to achieve prime after 45 seconds, what should I do?

A
  1. open tank to pump to get out water
  2. Throttle up to 1000-1500
  3. Simultaneously, close tank to pump, while opening a discharge, and activating the primer the entire time
  4. If I still fail to achieve prime I need to go back and check all the seals (make sure all discharges, drains, connections are closed, take off the other keystone and cap it)
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7
Q

What is an important rule of thumb for achieving prime?

A

10-20-30 rule

  1. No more than 10feet above the source
  2. No more that 20feet of hard suction hose (they come in 10 foot sections)
  3. It should not take more than 30 seconds to achieve prime
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