Evolution 2.0 — Foam operations with Pro/Pak

Out of the cab — get water moving

VERIFY PUMP IS ENGAGED

OPEN TANK TO PUMP

CRACK RE-CIRCULATING/TANK FILL VALVE

OPEN TANK FILL / RECIRCULATION

SET TO PSI MODE

SET PSI CONTROL MODE BUTTON

Printed here with no qualifier. The identical step on Evolutions 1.1 and 1.2 reads “Set to PSI mode (if equipped).”

PRIME PUMP (IF NECESSARY)

SET WHEEL CHOCKS

CHOCK WHEELS

This evolution’s printed sheet carries the chock step at this position — no correction needed here.

Where chocking sits in the pump skill

“Step 1: Position the apparatus in a safe positon, and immobilize it by setting the parking brake and chocking the wheels.” The pump skill chocks with the parking brake, before the pump is engaged; the printed evolution sheet carries it out of the cab at step 6.

ADO Task #19, Basic Pump Skills — Changeover, Operating Procedure, Step 1

CLEAR HOSE BED

BREAK ATTACK LINE (IF NECESSARY)

OPEN CORRECT DISCHARGE ONCE PRO/PAK IS CONNECTED TO HOSE LINE

CHECK LINES ARE FULLY DEPLOYED · CHARGE LINES

The card’s CALCULATE PDP / SET PDP steps have no counterpart on this evolution — the discharge pressure here comes off the Pro/Pak’s own flow chart at step 10, not from a pump-discharge calculation.

Foam — pressure, percentage, duration

SET DISCHARGE TO THE CORRECT PRESSURE ACCORDING TO DESIRED FLOW RATE

a) Minimum operating pressure = 40 PSIb) 100 PSI = 12 GPMc) 50 PSI = 8 GPM

What the manual rates the Pro/Pak at

Recommended rated flow: 12 gpm at 100 psi. Minimum operating condition: 7 gpm at 40 psi.

Those are the only two flow/pressure points the manual publishes. The sheet’s third point — 8 gpm at 50 psi — does not appear in the manual, and at the manual’s 40 psi minimum the manual says 7 gpm, not 8.

OFD Hydraulic Manual (Apparatus Driver/Operator Hydraulic Calculation Standards), Foam Operations §3.a–b · ADO-Pumper Task Book, Evolution 2.0, out-of-cab step 10

KNOW HOW MANY MINUTES TO USE 2.5 GALLONS OF CONCENTRATE

a) 0.1% = 208 minutesb) 0.3% = 69 minutesc) 0.5% = 42 minutesd) 1% = 21 minutes

TURN ON FOAM — Fire Attack / Overhaul = .2% – .5% · Exposure = .5% – 1%

The printed figures are reproduced exactly; the italic line is the engine evolution card’s own foam step. Neither set matches the OFD Hydraulic Manual, which meters 1–3% on hydrocarbons and 3–6% on polar solvents and alcohols — see How long the Pro/Pak lasts for the table to work from. The card-vs-manual percentages are on the committee list.

FOLLOW SHUT DOWN AND FLUSH PROCEDURES. INSTRUCTIONS LOCATED ON SIDE OF PRO/PAK

How long the Pro/Pak lasts

The table to work from

Orem’s own hydraulic standard prints the duration table at whole percentages, on the same 12 gpm basis and the same 2½ gallons of concentrate:

Minutes to use 2½ gallons of concentrate at 12 GPM
Percent	Minutes
1	21
3	7
6	3.5

Those percentages are the ones the same section authorises for the Pro/Pak: 1% and 3% AFFF on flammable liquids that do not contain alcohol, 3% and 6% Alcohol Resistant AFFF on flammable liquids containing polar solvents.

OFD Hydraulic Manual, Foam Operations — table “MINUTES TO USE 2 ½ GALLONS OF CONCENTRATE AT 12 GPM” and §3.c

Why the printed sheet’s percentages are not the ones to dial

Out-of-cab step 11 prints 0.1% / 0.3% / 0.5% / 1%. The hydraulic standard prints 1% / 3% / 6%. The two agree at exactly one point — 1% = 21 minutes — which is what shows they are the same calculation at a shifted decimal. The metering valve settings the standard gives are whole percentages (1–3% on hydrocarbons, 3–6% on polars and alcohols), so the tenths-of-a-percent rows have no setting to dial. Work from the 1 / 3 / 6 table.

ADO-Pumper Task Book, Evolution 2.0, out-of-cab step 11 vs OFD Hydraulic Manual, Foam Operations §1.a.iii and the 12 GPM duration table

And the Pro/Pak on the rig is carried half full

The apparatus check is explicit: “Pro/Pak is half full with AFFF foam.” The table above is written for 2½ gallons, so the real duration on the rig is roughly half of it — on the order of 10 minutes at 1%, 3½ at 3%, under 2 at 6%.

Carry both numbers: the full-charge table is what the drill and the manual are written to, the halved figure is what you actually have when you pull it off the rig.

OFD Apparatus Maintenance 2019, equipment checks — Pro/Pak, item 2 (full-charge figures from the OFD Hydraulic Manual table above; the halved figures are that table halved)

Learn the manual — foam operations

The Pro/Pak

What it is rated to do

Recommended rated flow — 12 gpm at 100 psi.
Minimum operating condition — 7 gpm at 40 psi.

OFD Hydraulic Manual, Foam Operations §3.a–b

What concentrate goes in it

“Pro/pak can be used with 1% and 3% AFFF Class B concentrates on flammable liquids that do not contain alcohol. It can be used with 3% and 6% Alcohol Resistant AFFF Class B concentrates on flammable liquids containing polar solvents.”

OFD Hydraulic Manual, Foam Operations §3.c

Where the Pro/Pak stops being the right tool

“Pro/pak should not be used on ignited Class B fuels with an area greater than 120 square feet. It should not be used on burning Polar Solvents with an area greater than 60 square feet.”

Past those areas the Pro/Pak is out of its envelope. The only other foam appliance the manual covers is the in-line eductor, below; the concentrate calculation decides whether there is enough foam on scene at all.

OFD Hydraulic Manual, Foam Operations §3.d

How much concentrate the fire needs

The calculation

Area × Critical Application Rate × Eduction Rate × 15 minutes = amount of foam concentrate needed.

Area — square footage; length × width. Circle: 3.14 × r².
Critical Application Rate — minimum flow of finished foam per square foot. Hydrocarbon fuels 0.1 gpm/sqft; polar solvents and alcohols 0.2 gpm/sqft.
Eduction Rate — minimum metering valve settings. Hydrocarbons 1–3%; polars and alcohols 3–6%.
15 minutes — the NFPA 11 standard for the amount of concentrate to have on hand to operate for 15 minutes.

OFD Hydraulic Manual, Foam Operations §1.a

The short way to the same number

Hydrocarbons: Area ÷ 20. Polar solvents / alcohols: Area ÷ 5.

The manual’s own worked example — a 10′ × 10′ (100 sqft) gasoline spill: 100 × 0.1 gpm/sqft × 0.03 × 15 = 4.5 gallons of concentrate. By the short method, 100 ÷ 20 = 5 gallons.

OFD Hydraulic Manual, Foam Operations §1.c–d

What you have on hand sets the size of fire you can take

“Remember, we are limited by how much foam we have on hand and how fast we can get more. It may be that if we only have 20 gallons (4 pails) we are limited to a 60′ x 60′ hydrocarbon or 30′ x 30′ polar solvent spill.”

OFD Hydraulic Manual, Foam Operations §1.e

Aeration — getting more finished foam out of the same concentrate

OFD has the option to use the TFT foam jet nozzle attachment for foam expansion, which increases the expansion ratio of Class B foam from 4:1 to 8:1.

OFD Hydraulic Manual, Foam Operations §1.b

If the job outgrows the Pro/Pak — in-line eductors

Rating, matching, and back pressure

OFD in-line eductors are rated at 95 gpm. The eductor and the nozzle must have matching flow rates for the concentrate to “pick-up.”
Eductors are designed to achieve rated flow with an inlet pressure of 200 psi.
Do not exceed 70% back pressure beyond the eductor.

The manual’s worked example: 70% of 200 psi is 140 psi; minus 100 psi of nozzle pressure leaves 40 psi to spend on everything past the eductor. By the hand method, a 1¾″ line flowing 95 gpm loses 12 psi per 100′, so 300′ costs 36 psi — inside the 40. Elevation gain or loss and any appliance friction loss come out of the same 40 psi.

OFD Hydraulic Manual, Foam Operations §2

IF THE LINE LOSES WATER

This evolution runs on tank water. Work the pump.

Emergency pump operations — the full sequence

READING THE PRINTED SHEET

The out-of-cab column is headed “Out-Of-Cab Operations: Draft” — the only evolution in the book carrying that qualifier. No step in 2.0 directs a drafting operation; the sequence is tank-to-pump throughout.
The setup block is three lines only. Unlike 1.0, 1.1 and 1.2 it carries no drill-record line and no “make sure all in-cab and out-of-cab operations are complete.”
2.0 carries no manual-discharge-relief-valve remark and no relief-valve step, unlike Evolution 1.1.
No role is named anywhere on the 2.0 page — no step reads “Engineer will…”. These are the candidate operator’s actions by the book’s own frame.

ADO-Pumper Task Book, Evolution 2.0, as printed

Source. ADO-Pumper Task Book, Evolution 2.0 “Foam operations with pro/pak” (September 2024 version) — setup, in-cab and out-of-cab steps verbatim, in printed order, with their printed numbering. The Engine 34 pump shift sub-sequence is the printed sheet’s own rig note, reproduced where it sits on the page (between in-cab 7a and 8).

Merged steps shown in italics under a printed step — set neutral · engage pump button · open tank fill / recirculation · set PSI control mode button · chock wheels · check lines are fully deployed / charge lines · turn on foam with its percentages — are from the engine evolution card, 2026-08-28 transcription.

Manual material. OFD Hydraulic Manual (Apparatus Driver/Operator Hydraulic Calculation Standards), Foam Operations — §1 calculating foam and aeration, §2 in-line eductors, §3 Pro/pak, and the table “MINUTES TO USE 2 ½ GALLONS OF CONCENTRATE AT 12 GPM” · ADO Task #19, Basic Pump Skills — Changeover, Operating Procedure Step 1 · OFD Apparatus Maintenance 2019, equipment checks — Pro/Pak.

See also: My Engine Evolution — the full muscle-memory sheet these merged steps come from.

Version: prototype · Last reviewed 2026-08-30 · Compiled by Engineer Jason Anderson

2.0 — Foam operations with Pro/Pak

In-cab — secure the rig & engage the pump

Engine 34 pump shift operations