Knight Foam Clean 25-95 User manual

0901154 Rev: A (04/10) Page 1 of 12
Foam Clean 25-95
Instruction Manual

Page 2 of 12 0901154 Rev: A (04/10)
CAUTION: Wear protective clothing and eyewear when dispensing chemicals or
other materials. Observe safety handling instructions (MSDS) of chemical mfrs.
CAUTION: When installing any equipment, ensure that all national and local
safety, electrical, and plumbing codes are met.
TABLE OF CONTENTS
Introduction........................................................................................................... 3
Applications .......................................................................................................... 3
Requirements ....................................................................................................... 3
Specifications ....................................................................................................... 3
Safety Precautions ............................................................................................... 4
After Use .............................................................................................................. 4
Maintenance ......................................................................................................... 4
Operation.............................................................................................................. 5
Troubleshooting.................................................................................................... 6
Mobil Cart Parts Diagram ..................................................................................... 8
Pump & Plumbing Parts Diagram ......................................................................... 9
European Parts Diagram .................................................................................... 10
Replacement Parts List ...................................................................................... 11
Warranty Information .......................................................................................... 12
Knight Locations ................................................................................................. 12

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INTRODUCTION
Foam cleaning is recognized as an effective method for removing oil and heavy soils from all types of surfaces. It is
used for cleaning throughout the food processing, dairy, transportation, industrial and agricultural industry. Due to it’s
characteristics, cleaning with foam is safe and cost effective. Foam can adhere to irregular surfaces and provide
better coverage than liquid cleaning chemicals. Foam stays in place longer to actively lift dirt and oil from surfaces
until it is rinsed off.
Knight’s Foam Clean system dispenses a rich lather of foam up to 65 GPM with a distance of up to 30 feet. With a
built-in 4 GPM (15 ltr/min) air operated pump, you’ll get consistent foaming quality for clean results. Simply turn a
knob and you can adjust the dryness or wetness of the foam for different cleaning applications.
APPLICATIONS
Food Processing Plants: Process Food, Beverage, Dairy, Baking, Poultry, Smoke Houses, Seafood.
Transportation: Trucking, Aviation, Transit, Automotive, Military, Ships, Construction Equipment.
Industrial: General Cleaning, Machinery Degreasing, Paint Manufacturers, Paper Mills.
Agricultural: Dairy, Poultry, Farm Equipment, Hog.
REQUIREMENTS
 Minimum 60 PSI clean, dry air at 5 –10 CFM during operation of the foamer.
 Chemical requirement: Most foam cleaning dilution rates operate at 3 to 5 oz/gal (24 to 39 ml/ltr) —consult your
chemical supplier for the proper foaming product and mixing ratio to use.
SPECIFICATIONS
Foam Output 65 gal/min (246 ltr/min)
Foaming Distance 25—30 feet (7.5—9 meters)
Chemical Compatibility Santoprene: All acids, corrosives, and petroleum products
Viton: Alkalines, soaps, mild acids, sodium hypochlorite
Air Operated Pump Materials Polypropylene Body w/ Santoprene Seals and Diaphragm
Polypropylene Body w/ Viton Seals and Diaphragm
Air Consumption 60-80 psi, 5-10 scfm
Hose Portable: 25 feet (7.6 meters) reinforced hose, 3/4‖ ID with wand

Page 4 of 12 0901154 Rev: A (04/10)
SAFETY PRECAUTIONS
 Read and understand the MSDS sheets for the cleaning chemicals that will be used —consult your chemical
supplier if you have any questions.
 Always wear safety goggles and protective gloves while operating the foam unit.
 Avoid contact of cleaning agents with skin and eyes. If contact occurs, rinse affected area with water for 15
minutes, and seek medical attention, if needed.
 Drain fluid contents of unit and flush out tank if using different types of chemicals from operation to operation.
 Never point the Discharge Foam Wand at anyone.
 Be sure to flush unit with fresh water when switching from alkaline to acid, or acid to alkaline product.
 Never leave unit unattended while discharge hose is under pressure.
 Never foam directly into an uncovered electrical outlet or electrical panel.
 Stand far enough away from surface being foamed to prevent foam from splashing on you.
AFTER-USE
(1) Fill the tank with fresh water and rinse thoroughly. With discharge valve ―open‖, allow pump to run until all
chemical has been pumped through discharge hose, and air has been purged.
(2) Close the Air Inlet Valve and relieve all remaining pressure on the unit by opening the valve on the discharge
hose and leave in the ―open‖ position.
(3) Open the drain plug on the bottom of the tank to remove any remaining liquid from the tank. The drain plug is 1‖
NPT with a 1.375‖ hex head.
MAINTENANCE
 Periodically check the air pump for leaks or evidence of wear/breakdown.
 Periodically replace filter media in filter/dryer.
 Periodically check the pickup tube for blockage, and flush to clean.

0901154 Rev: A (04/10) Page 5 of 12
Figure
E
Figure
C
Figure
D
Figure
B
Figure
A
OPERATION
(1) [Fig. A] Fill the foamer tank with a combination of
water and foaming chemical —consult your chemical
supplier for proper dilutions. Do not overfill tank.
(2) [Fig. B] Close Wet Foam/Dry Foam Valve completely
—turn clockwise until it stops.
(3) [Fig. C] Make sure the ball valve on the discharge
hose is closed!
(4) [Fig. D] Connect a clean, dry, air supply to the
5/16” quick connect fitting on the unit. Note: Unit
will operate when air supply is on.
(5) [Fig. C] Slowly open the ball valve on the discharge
hose while holding foam wand away from you.
Closing the ball valve will turn pump off.
(5) [Fig. E] Adjust air pressure regulator to achieve
desired pump flow rate (between 60—80 PSI for
optimum results).
(6) [Fig. B] Open Wet Foam/Dry Foam Valve in the
counter-clockwise direction four complete turns.
(7) [Fig. B] Continue to open the Wet Foam-Dry Foam
Valve in ¼ turn increments, allowing a few seconds
between adjustments, until the proper consistency
(dryness) of foam is achieved.

Page 6 of 12 0901154 Rev: A (04/10)
TROUBLESHOOTING
PROBLEM SOLUTION
(1) Unit will not operate. Check for proper air pressure (60 PSI or more into
unit). 60 PSI on Air Gauge.
Check Air Regulator Filter for obstruction such as
water, oil, or debris.
Check for plugged strainer and replace Air
Regulator Filter Assembly, if necessary.
(2) Unit will not make foam. Make sure the correct foaming chemicals and
concentrations are being used.
Checkvalve is installed backwards.
Packing is contaminated or degraded. See item #8
for details on how to service the packing.
(3) Wet Foam-Dry Foam Valve is opened too far
pump will not cycle properly due to lack of air
pressure.
If this occurs, close valve and follow the instruction
in Steps 5—7 under ―Operation‖ (page 3).
(4) Air passes through the pump without cycling. Repair or replace the pump.
(5) Foam Solution backs up into the air filter. Checkvalve needs replacing.
(6) Pump cycles but no liquid is discharged. Check to see if pump is primed.
Check footvalve/strainer orientation. Arrow must
point toward pump suction port.
Suction line leak.
Pump fittings loose or broken.
Suction line not submerged down into liquid.
If all of the above check out okay. Repair or replace the pump.

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PROBLEM SOLUTION
(7) Foam comes out wet regardless of where the Wet
Foam-Dry Foam is set.
Checkvalve may be plugged and needs replacing.
Ball valve may not be open all the way on foam
wand. This may happen if the operator is standing
too close to a wall and closing the ball valve slightly
to reduce splash of foam.
(8) Unit foams at reduced pressure. Check the air supply into the unit. If air pressure is
low, turn unit off until air supply can bring pressure
back up.
If you know the air supply is 60 PSI or higher, check
the internal air gauge which should read near 60 PSI
or higher. Adjust Pressure Regulator to required
minimum 60 PSI.
If both of the above check out okay, the S.S.
packing could be plugged. Remove and clean it
per the instructions to the right:
(i) Be sure to turn off air to unit and open the cut-off
valve on the discharge hose to remove back-
pressure on the unit.
(ii) Remove the hose barb from the Discharge Tee.
(iii) Remove the screen retainer and packing from inside
the tee.
(iv) Clean any particles from the packing and the screen
retainer.
(v) Replace the packing and screen retainer into the tee
and replace the hose barb fitting. Use a pipe thread
sealant to prevent leaks.
(9) Pump does not stop with ball valve (wand) turned
off.
Chemical lines not primed and/or air leaks in the
pump tubing.

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MOBILE CART & DISCHARGE HOSE

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PUMP & PLUMBING

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EUROPEAN PARTS
0800537
Air Supply Hose
50 ft (15.2m) European Plug
0800538
Air Supply Hose
25 ft (7.6m) European Plug
0800539
Foam Clean Hose
3/8 ID x 25 ft (7.6m)
0800545
3/8 ID x 40 ft (12m)
7649288-1
Front Wheel Kit
Steel with Brakes
7649288-2
Front Wheel Kit
Stainless Steel with Brakes
PVC Wand Assembly, 1/2‖ FPT
1400554-1 18in (46cm)
1400554-2 24in (61cm)
1400554-3 36in (91cm)
PVC Wand Assembly, 3/8‖ NPT
1400556-1 18in (46cm)
1400556-2 24in (61cm)
1400556-3 36in (91cm)
SST Wand Assembly, 3/8‖ NPT
1400557-1 18in (46cm)
1400557-2 24in (61cm)
1400557-3 36in (91cm)