Emergency Vehicle Ops: Pump Operations and Hydraulic Calculations

Course: Pumps Refresher Course Session Reference: 2 Topic: Pump Operations and Hydraulic Calculations Time Required: 3 hours Materials: Chalkboard Reference: Pump Operator Student Manual, Maryland Fire and Rescue Institute...


Course: Pumps Refresher Course

Session Reference: 2

Topic: Pump Operations and Hydraulic Calculations

Time Required: 3 hours

Materials: Chalkboard

Reference: Pump Operator Student Manual, Maryland Fire and Rescue Institute

Preparation:

Motivation:

Objective (SPO): 2-1

The student will demonstrate a basic understanding of the operation of a centrifugal fire pump to supply water from various sources and involving various operations through class discussion and participation and completion of hydraulic problems to the satisfaction of the instructor.

Overview:

Pump Operations and Hydraulic Calculations

   * Pumping Operations

   * Hydraulic Problems

Session 2 Pump Operations And Hydraulic Calculations

SPO 2-1 The student will demonstrate a basic understanding of the operation of a centrifugal fire pump to supply water from various sources and involving various operations through class discussion and participation and completion of hydraulic problems to the satisfaction of the instructor.

2 - 1 Demonstrate an understanding of pump operations supplying water from various sources, in various capacities, and in various types of operations.

2 - 2 Demonstrate an understanding of hydraulics through the successful calculation of various hydraulic problems, within an acceptable engine pressure range.

I . Pumping operations (2-1)

A. Water sources

  1. Apparatus tank

      a. Tank capacities

      b. Portable tank operations

      c. Tanker shuttle

          1 ) Fill station operations

               a ) Portable pumps

               b ) Volume pumpers

               c) Direct vs. through-the pump filling

               d ) Appliances

          2 ) Dump station operations

                a ) Multiple tanks

                b ) Portable tank shuttling

                c) Side vs. rear dumps

                d ) Appliances

  2. Pressurized system

       a. Capacities - volume and pressure

           1 ) Color coding

                 a ) Light blue - 1500 gpm or greater

                 b ) Green - 1000 to 1499 gpm

                 c) Orange - 500 to 999 gpm

                 d ) Red - less than 500 gpm

            2 ) Measuring flow

                  gpm = 29.7 times d2 times the square root of p

                  29.7 – constant

                  d - diameter of the opening

                  p - pressure of the opening

       b. Connections

           1 ) Size

           2 ) Number

       c. Appliances

          1 ) Humat

          2 ) Hydrant gate or ball valve

          3 ) Siamese

          4 ) Suction hose

     d. Operations

         1 ) Hydrant pressure vs. volume

         2 ) Estimating hydrant capacity

               a ) 10% change indicates that one-third of available water is being used

               b ) 25% change indicates that one-half of available water is being used

          3 ) Single pumper

          4 ) Multiple pumpers

          5 ) Multiple lines

  3. Static source

      a. Components required

          1 ) Strainer - barrel or floating

          2 ) Hard suction(s)

          3 ) Rubber mallet

          4 ) Ladder, shovel, or bucket

     b. Lift impact - lifts exceeding 10 feet will affect pump capacity

     c. Access

     d. Single vs. multiple supply pumpers

B. Utilization of apparatus

  1. Attack pumper

      a. Flow requirements

      b. Number and size of attack lines

      c. Master streams

  2. Supply pumper

      a. Flow requirements

      b. Number and size of supply lines

      c. Distance between source and scene

      d. Pumper capacities

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