Lafferty Equipment Manufacturing, LLC

Installation & Operation Instructions

Model # 920120QD · Pump Fed Sanitize / Foam Hose Drop Station W/ QDs

Requirements

Ready-to-Use Chemical Solution
Temperature up to 160°F
Pressure 35 to 125 PSI
Flow 1.7 GPM @ 40 PSI
Supply Line 1/2"
Compressed Air up to 4 CFM
Hose
Sanitize 1/2" ID x 50'
Foam 3/4" ID x 50'
Nozzle
Sanitize 2520
Foam 50250

Options

Stainless Steel Hose Racks
Large Stainless Steel Hose Rack# 224150
Foam Solution Check Valves & Strainer
Check Valve, PP, 1/2'' (EPDM)# 491409
Check Valve, PP, 1/2'' (Viton)# 491411
Check Valve, 316SS, 1/2", MF (Teflon)# 491348SS-T
Strainer, "Y", SS, 1/2" MF# 150350-1
Alternate Air Check Valve - EPDM Standard
Check Valve, Air, SS, 1/4" MM (Viton / Hast)# 491306
Stainless Steel Foam Wand (Upgrade)
Convert PP Wand to SS (New Units)# 536603-X
920120QD
Warning! Read All Instructions Before Using Equipment!

Overview

The Pump Fed Sanitize / Foam Hose Drop Station is a combination applicator for projecting one ready-to-use chemical as foam and another as a sanitizing spray through two quick-disconnect hoses. This unit receives 2 separate ready-to-use chemical solutions from separate central chemical feed systems. Rich, clinging foam is created by injecting compressed air into the foaming solution to greatly increase volume and coverage ability. Foam is then projected through the foam hose and fan nozzle on to any surface up close or at distances up to 12 feet. Sanitizer solution, or any other chemical, is projected through a separate hose as a fan pattern spray.

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.
  • For pressures over 100 PSI, remove the discharge valve or lower pressure
  • Follow the chemical manufacturer’s safe handling instructions.
  • Turn off solution supply and air when unit is not in use for extended periods.

To Install (refer to diagram on next page)

A check valve is required on the foamer solution inlet to prevent air from going back into the solution line. (See Options)

  1. Mount the unit to a suitable surface.
  2. Connect the discharge hoses as shown in the diagram and close the ball valves.
  3. Install a solution check valve on the foamer solution inlet(s) and connect pre-mixed solution supply.
  4. To prevent blocking the small jets, flush any new plumbing of debris before connecting. (And/or install a strainer)
  5. Connect compressed air supply. If piping is older and has known contaminants, install a filter.

To Operate

Always make sure the discharge is closed or pointed in a safe direction before turning inlet valve on. Discharge can be shut off at any time during operation but should not be left off for long periods of time with the inlet valve on.

TO FOAM

  1. With wand in hand open the inlet ball valve, and the air ball valve.
    • Wait a few seconds and observe foam consistency.
    • Use the least amount of air needed to achieve good foam quality to prevent solution  pressure fluctuations from affecting performance. Air pressure must be kept lower than solution pressure.
    • To adjust the foam consistency pull out on the air regulator knob, turn slightly clockwise for dryer foam and counterclockwise for wetter foam. Wait a few seconds to see each adjustment.
    • Medium wet foam will give the best cleaning results! Dry foam will NOT clean as well!
    • You may also have to try different chemical ratios and air settings until foam consistency and cleaning results are acceptable. Once this is set and desired foam consistency is achieved push lock the knob. you are ready to start application.
  2. When foaming is completed, close the discharge ball valve, return to the unit and close the solution and air ball valves. Briefly re-open the discharge ball valve to relieve pressure in the hose. Rinse before the foam dries.

TO SANITIZE

  1. With discharge wand in hand open the inlet ball valve. Then open the discharge ball valve to begin application.
  2. When sanitizing is completed, close the discharge ball valve then close the inlet ball valve.
  3. Briefly re-open the discharge ball valve to relieve pressure in hose. If applicable, rinse the work surface before solution dries.

Unit Flow Rates

PSIGPM
SanitizeFoam
351.591.59
401.701.70
501.901.90
602.082.08
702.252.25
802.402.40
902.552.55
1002.692.69
1102.822.82
1202.942.94
1253.013.01
920120QD.jpg
Troubleshooting Guide
Problem Possible Cause / Solution
StartupMaintenance
A) Foam surges and/or hose "bucks"
B) Foam too wet
C) Foam does not clean properly
D) Air backing up into foam solution line
E) Chemical solution backing up into airline
1, 2, 3, 4, 5, 7, 8
2, 3, 4, 7, 8
1, 4, 9
10, 11, 14
12, 14

14
13

Problem Possible Cause / Solution
StartupMaintenance
A) Sanitizer has weak spray
2, 3, 6, 7

10, 11

Possible Cause / Solution
StartupMaintenance
  1. Air pressure too high
    • Adjust the air regulator slowly counterclockwise until output stabilizes or foam is "wetter"
  2. Solution pressure or volume too low/inlet piping too small causing poor chemical pick up
    • Increase pressure
    • Reduce number of stations being used at one time
  3. Inlet or discharge ball valve not completely open
    • Completely open the inlet and discharge ball valves
  4. Not enough chemical or improper chemical
    • ​​​​​​​Increase chemical concentration
    • Ensure product is recommended for foaming and the application
  5. Foam nozzle has been changed- too small
    • ​​​​​​​Replace nozzle with correct size
  6. Sanitizer nozzle has been changed- too large
    • ​​​​​​​Replace nozzle with correct size
  7. Discharge hose too long or wrong size or kinked
    • ​​​​​​​Straighten the hose or replace hose with correct size and length​​​​​​​
  8. Air pressure too low / use of an oiler in the airline will cause poor foam quality
    • ​​​​​​​Adjust the air regulator slowly clockwise
    • Use only clean, dry air
  9. Soil has hardened on surface, rinse foam before it dries
    • ​​​​​​​​​​​​​​Reapplication may be necessary
  1. Inlet orifice clogged
    • Clean / clean inlet orifice / DO NOT DRILL OUT
    • Install a strainer
  2. Chemical build-up may have formed in the body causing reduced flow.
    • Carefully remove fittings and soak entire body in descaling acid
  3. Air regulator failed
    • Clean or replace
  4. Air check valve failed
    • ​​​​​​​Clean or replace
  5. No solution check valve installed or failed
    • ​​​​​​​Install a check valve in the inlet
    • Clean or replace
PREVENTIVE MAINTENANCE: When the unit will be out of service for extended periods, run water through the system to flush the chemical and help prevent chemical build-up.