1-Way APV-MM Concrete Foamer

Lafferty Equipment Manufacturing, LLC

Installation & Operation Instructions

Model # 933605-V · 1-Way APV-MM Concrete Foamer

Requirements

Chemical Concentrate
Static Tank of Water
Compressed Air up to 6 CFM
Hose 3/4" ID x 50'
Nozzle 40150

Options

Stainless Steel Hose Racks
Large Stainless Steel Hose Rack# 224150
Stainless Steel Jug Racks Available
Drum & Tote Stick Lengths & Seal Materials
Drum Stick, 33" (Viton or EPDM)# 491643 / 491643-E
Drum Stick, 48" (Viton or EPDM)# 491648 / 491648-E
Drum Stick, 54" (Viton or EPDM)# 491645 / 491645-E
Tote Stick, 33" (Viton or EPDM)# 491653 / 491653-E
Tote Stick, 48" (Viton or EPDM)# 491654 / 491654-E
Tote Stick, 54" (Viton or EPDM)# 491656 / 491656-E
Alternate Seal Materials - Santoprene Standard
Viton Upgrade: Flojet Air Pump & Check Valves# 710756
Kalrez Upgrade: Flojet Air Pump & Check Valves# 710755

Weight & Dimensions

Single Package
Shipping Weight38 lbs.
Shipping Dimensions34" x 29" x 12"
933605-V
Acid_LC.jpg
Lafferty Equipment Logowww.laffertyequipment.com
501-851-2820
Warning! Read All Instructions Before Using Equipment!

Overview

The 1-Way APV-MM Concrete Foamer is a foam applicator for applying highly corrosive chemicals such as those used to remove concrete and for aluminum brightening. This acid-resistant system uses a 1/4" FloJet air-operated, double-diaphragm pump to draw chemical concentrate and water from static tanks and blend them to create dilution ratios from 10:1 to straight chemical. Compressed air is injected into the solution to create rich, clinging foam which is then projected through the hose, wand and fan nozzle on to any surface.
Lafferty Equipment Manufacturing, LLC • 8504 Mac Arthur Drive • North Little Rock, Arkansas 72118

Safety & Operational Precautions

  • For proper performance do NOT modify, substitute nozzle, hose diameter or length
  • Manufacturer assumes no liability for the use or misuse of this unit.
  • Wear protective clothing, gloves and eye-wear when working with chemicals.
  • Always direct the discharge away from people and electrical devices.
  • Follow the chemical manufacturer’s safe handling instructions.
  • DO NOT use chemicals that are not compatible with Viton diaphragms.

To Install (refer to diagram on next page)

  1. Mount the unit above chemical and / or water containers.
  2. Securely attach the suction tubes to the check valves as shown in the drawing.
  3. Place one tube/strainer in the chemical concentrate(s) and the other in a static container of water. (DO NOT use pressurized water!)
  4. Attach a compressed airline to the inlet ball valve. DO NOT TURN ON
How to Set Your Dilution Ratio:
  • The adjustment knobs allow you to achieve wide range of dilution ratios.
  • Turn adjustment knobs counterclockwise to increase flow or clockwise to decrease flow.
  • For a starting place turn the water knob completely clockwise (closed) then turn 2 turns counterclockwise (open).
  • Then turn the chemical knob completely clockwise (closed) then counterclockwise (open) in 1/4 to 1/2 turn increments until required dilution ratios are achieved.
  • If ratios can't be achieved with the chemical knob all the way counterclockwise start turning water knob clockwise to shift more draw to the chemical side.

To Operate

  • Always make sure the discharge ball valve is closed or pointed in a safe direction before turning the air on. Ball valve can be shut off at any time during operation but should not be left unattended for long periods of time. Expect a strong blast when re-opening ball valve.
  • The unit has been tested and is ready to operate, the air pressure preset at 60 PSI. This is the optimum pump pressure. Test "as is" before making any adjustments.
  • The foam consistency knob is pre-set at 1/2 turn. To adjust foam consistency, turn the foam consistency needle valve counterclockwise a maximum of 1 turn for dryer foam and clockwise for wetter foam. Wait several seconds after each adjustment to see the results.
  1. With the foam wand in hand direct the discharge in a safe direction and open the discharge ball valve and the air ball valve.
  2. Final chemical dilution and foam consistency adjustments will now have to be made. Make adjustments to the knobs based on results.
  3. If the solution seems to be too weak slowly turn the chemical knob counterclockwise.
  4. Continue opening till the solution is strong enough for the application
  5. If the flow of foam surges, the needle valve is open too much or the chemical concentration is too weak, reduce the air flow by turning the needle valve slowly clockwise until the foam flow stabilizes. Or add more chemical concentrate.
  6. A medium-wet foam will give the best cleaning results! Very dry foam will NOT clean as well!
  7. When foaming is complete:
    • Close the discharge ball valve.
    • Promptly return to the unit and close the air ball valve.
    • Briefly re-open the discharge ball valve to relieve pressure in the hose.
  8. Rinse the work surface before the foam dries.




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Troubleshooting Guide
Problem Possible Cause / Solution
StartupMaintenance
A) Air pump will not pump or runs with no output.
B) Foam surges and/or hose "bucks".
C) Foam output too wet.
D) Foam output too dry.
E) Cleaning results not acceptable.		1, 2, 3, 4, 7
1, 2, 3, 4, 5, 6, 7
1, 2, 3, 4, 5, 6
2
5, 6, 8		 9, 10, 12, 13, 14
9, 12, 13
9, 12, 13
Possible Cause / Solution
StartupMaintenance
  1. Inlet ball valve partially closed or air pressure too low.
    • Completely open air inlet ball valve.
  2. Foam consistency needle valve open too much
    • Adjust the needle valve slowly clockwise until foam stabilizes. Turn round handle slightly clockwise for wetter foam; open counterclockwise for dryer foam. Open a maximum of 1 turn.
  3. Discharge ball valve not completely open or Discharge hose kinked
    • Completely open the discharge ball valve / straighten hose
  4. Solution tube not completely immersed in chemical or container empty
    • Immerse tube or replenish chemical.
  5. Dilution too weak
    • Turn chemical needle valve counterclockwise or water needle valve clockwise for a stronger solution.
    • Turn chemical needle valve clockwise or water needle valve counterclockwise for a weaker solution.
  6. Improper chemical
    • Ensure product is recommended for foaming and/or the application
  7. Ice particles from condensation in air line — Air pump can periodically "freeze up” (stall) due to ice particles in the pump's exhaust (depending on air humidity & other factors)
    • WAIT several seconds to allow the ice particles to melt and blow out, at which time the pump will automatically resume pumping.
  8. Soil has hardened on surface
    • Always rinse foam before it dries.
  1. Solution strainer blocked
    • Clean or replace
  2. Air regulator failed
    • Clean or replace
  3. Air or water check valve(s) failed
    • Clean or replace
  4. Discharge hose wrong size or kinked (See REQUIREMENTS, page 1).
    • Straighten the hose
  5. Nozzle size too small or missing
    • See REQUIREMENTS, page 1.
  6. Problem with air pump
PREVENTIVE MAINTENANCE: When the unit will be out of service for extended periods, place chemical tube(s) in water and flush the chemical out of the unit to help prevent chemical from drying out and causing build-up. Periodically check and clean chemical strainer and replace if missing.