Advent Balanced Pressure Foam Systems

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When simplicity and performance counts - count on Williams Fire and Hazard Control (WF&HC) Advent foam systems.

The Advent foam system was designed with the firefighter in mind. An emergency is not the time to perform complicated procedures in order to operate a foam system. The Advent system is activated by the flip of one switch. It’s that easy! Plus, Advent foam systems offer the proven performance and reliability of basic balanced pressure technology packaged in a user-friendly yet extremely versatile configuration.

The Advent systems were designed for use with WF&HC Thunderstorm and T-Storm AR-AFFF type concentrates for hydrocarbon and polar solvent fuels and all "Class A" structural firefighting foams used today. The Advent can also be used to proportion other brands of modern "Class B" synthetic (Thixotropic) and protein foams.

System Overview

The system combines the proven reliability of a balance pressure foam system along with simplified user-friendly controls.  In operation, foam concentrate pressure, supplied by a positive displacement pump, shall be automatically controlled so that it is equal to system water pressure by regulating foam concentrate by-pass flow.  This by-pass flow is returned to the suction side of the foam pump.  A Foam-to-Water heat exchanger (shell & tube type) is employed to keep the foam cool in the event of a prolonged “dead head” pump operation.

Each water discharge (that is dedicated for foam operation) shall be equipped with a ratio flow controller, which proportions foam concentrate into the water line. The ratio controller is a device that creates a small “metering pressure drop” based on the amount of flow that is passing through it. The greater the flow the more foam enters the system, and the lower the rate the less foam enters the system.

Foam concentrate shall be pumped from the tank and discharged through metering valves to the individual ratio flow controllers. These metering valves function as a concentrate shutoff, as well as adjustable foam percentage control devices (up to 6%) for each foam system discharge.  Foam solution shall be produced at any ratio flow controller/discharge connection by opening the corresponding foam solution metering valve to the desired percentage rate. Plain water shall be simultaneously available at the remaining discharge connections.

The Advent system is available in standard capacities of 12, 30, 60 and 120 gpm (45, 114, 227 and 454 Lpm) foam concentrate flows.  The Advent 12 is available as a 230 VAC, 3 HP electric or chassis transmission PTO driven configuration. The 230 VAC electric driver versions can be used where all PTO openings are being utilized for other applications and/or foam system operation independent of chassis engine speed is needed and/or desired.  Advent 30, 60, 120 and all optional flow capacity systems available as PTO driven only.

Features & Benefits

  • Cost effective when compared to systems with equivalent capabilities
  • Multiple foam injection points
  • Simultaneous variable proportioning rates
  • Capable of operation with Class A or B foam concentrates
  • All mechanical components, no electronics
  • No additional load on the chassis electrical system (less than 1 amp @ 12 VDC)
  • Automatic pressure control
  • Manual by-pass capability
  • Installer friendly - Does not require common manifolding
  • Standard system capacities of concentrate flow rates from 12 to 120 gpm (45 – 454 Lpm)
  • Broad range of solution flow rates from 40 to 5,000 gpm (151 – 18,927 Lpm)

Available Options

  • Tank-to-pump and tank-fill controls
  • A/B tank selector and flush control
  • Optional single or dual tank controls sold separately
  • Individual discharge metering valves sold separately with discharge ratio controller kits
  • Pneumatic Tank Control Kit
  • Pneumatic A/B Change-over Kit

Standard Advent Foam System Sizing & Capacities

System Rating (gpm)

Pump Ports Size (in)

Suction Plumbing Size (in)

Discharge Plumbing Size (In)

Relief Valve Size (in)

Tank Suction Valves (1)

Tank Fill Valves (1)

Flush Valve Size (in)

By-Pass Valve Size (in)

PCV Model Number

PCV Port Size (in)

Intake Valve Size (in)

Discharge Valve Size (in)

Solution Capacity @ (150*)  250 psi Discharge Pressure

A

B

A

B

0.25% (gpm)

0.5% (gpm)

1% (gpm)

3% (gpm)

6% (gpm)

12*

1.0 fnpt

1.5

1

0.75

1

1.5

0.5

0.5

0.375

1

25

1.5

1

0.75

4800

2400

1200

400

200

30

1.5 fnpt

2

1.5

1

1.5

2

0.5

0.75

0.5

1.5

25

1.5

1.5

1.5

12000

6000

3000

1000

500

60

1.5 fnpt

2

1.5

1.5

1.5

2

0.75

1

0.75

1.5

75

2

2

1.5

24000

12000

6000

2000

1000

120

2.0 fnpt

2.5

2

1.5

2

2.5

1

1.5

1

2

100

2

2.5

2

48000

24000

12000

4000

2000

Notes:

(1) Single tank system Tank Suction / Tank Fill valves default to "B" sizes.

Advent Foam System Ratio Controller Capacities & Component Sizing

Ratio Controller Size (in)

Foam Port Size (npt)

Foam C/V & Supply Plumbing (in)

Metering Valve Port Size (in)

Metering Valve Body Size

Includes Pressure Relief By-Pass

RC Flow Range (gpm)

NFPA 1901 Discharge Flow Rating (gpm)

Low

High

2

1

1

1

Small

No

40

200

125(2)

2.5

1

1

1

Small

No

95

500

250

3

1.25

1.5

1.5

Small

No

125

700

375

4

1.5

1.5

1.5

Small

No

250

1250

625

5

2

2

2

Big

Yes

350

1750

1000

6

2

2

2

Big

Yes

500

2500

1440

6H

2

22BigYes

600

3000

1440

8

2.5

2.5

n/a(1)

n/a(1)

n/a(1)

1000

5000

n/a(3)

Notes:

(1) Standard metering for 8" ratio controllers is accomplished with a 2" npt ported control valve and 2" orifice tube for each of two proportioning rates.

(2) NFPA 1906

(3) No NFPA listing for 8" discharges.

(4) Based on 8" ratio controller midrange flow of 3000 gpm.

(5) For 1 x 3 applications 3% = 1% orifice size of .561" plus second orifice size of .688".

(6) For 3 x 6 applications 6% = 3% orifice size of .983" plus second orifice size of 1.010".

Ordering Information

Advent System Part Number

Model

Base Unit Single Tank ControlDual Tank Control
Advent 12 (PTO)/12 VDC116911170111706
Advent 12 (PTO)/24 VDC11692
Advent 12E (230 VDC)/12 VDC11693
Advent 12E (230 VDC)/24 VDC11694
Advent 30/12 VDC116951170311708
Advent 30/24 VDC11696
Advent 60/12 VDC116971170411709
Advent 60/24 VDC11698
Advent 120/12 VDC116991170511710
Advent 120/24 VDC11700

Advent Ratio Controller Kits

Part NumberDescription
11711Advent RC kit, 2”
11712Advent RC kit, 2.5”
11713Advent RC kit, 3”
11714Advent RC kit, 4”
11715Advent RC kit, 5”
11716Advent RC kit, 6”

Notes:

Complete Advent System consists of base unit, choice of either single or dual tank controls, and required size(s)/quantity of ratio controller kits.

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