DEMA 925N Rotomolded Portable Foam Units User Manual

USER MANUAL
MODEL NUMBER:
925N
925N-K
925N-V
AND RELATED UNITS
25 Gallon Air Operated Portable Foam
Equipment

READ ALL INSTRUCTIONS BEFORE OPERATING EQUIPMENT

WARNING Read this manual completely and understand the machine before operating or servicing it.

• Always wear protective clothing, gloves, and eyewear while operating or servicing unit.
• Avoid contact of cleaning agent with skin and eyes. If contact occurs, see Safety Data Sheet (SDS) sheet for further first aid measures.
• Follow safety instructions of chemical manufacturer SDS.
• Never point the discharge wand at anyone.
• Incoming air pressure cannot exceed 100 psi (7 bar).
• After each use, relieve all remaining pressure in the system by unplugging the air line from the unit and opening the discharge ball valve to prevent accidental discharge.
• After relieving the pressure from the unit, store the unit with the ball valve in the closed position.
• Be sure to flush the unit with fresh water for 5 minutes when switching from an alkaline to an acid or an acid to an alkaline.
• Do not exceed a fluid temperature of 100˚F (37˚C).
• Only use clean and dry air. Air must be filtered and free of moisture or pump life will be diminished. If needed, install an air dryer before unit.
• Do not use air lubricator before the unit.

PROTECT THE ENVIRONMENT
Please dispose of packaging materials, old machine components, and hazardous fluids in an environmentally safe way according to local waste disposal regulations. notice.
*** Always remember to recycle.
Specifications and parts are subject to change without

Specifications:
Hose ………… 30 feet reinforced hose, 3/4 inch inside diameter
(9 meters reinforced hose, 19 mm inside diameter)
Foam Output……………………………… 20 to 45 gallons/minute
(75 to 170 liters/minute)
Foam Distances …………………………. 25 to 30 feet (7 to 9 meters)
Liquid Temperature …………………… 40˚F to 100˚F (4.4˚C to 37˚C)
Noise Level……………………………….. Average 79 dB(A)
Discharge Wand Vibration Level ….. Maximum 2.5 m/s²
Dimensions:
Length ………………………………… 22 in (559 mm) approximately
Width …………………………………. 19 in (483 mm) approximately
Height ………………………………… 47 in (1194 mm) approximately
Weight, including discharge hose and wand:
(Empty) ………………………….. 50 lbs (23 kg) approximately
(Full) ………………………………. 223 lbs (101 kg) approximately
Requirements:
Compressed Air Pressure Requirements: Air regulator (R25) factory set at 50 psi (3.4 bar). Operating range is 40 to 80 psi (3 to 5 bar) with 5 to 10 CFM (141.64 to 283.30 l/min) Chemical requirements: follow all instructions from chemical manufacturer.
Air Operated Double Diaphragm Pump Models Offered:
P56: Polypropylene body with Santoprene diaphragm
P56V: Polypropylene body with Viton diaphragm
P56K: Polypropylene body with Kalrez diaphragm
Acceptable Products:
Alkaline cleaners, Caustic cleaners, Sanitizers, and Acids

• D-Limonene may only be used with Kalrez pump
• Chlorine may only be used with Viton or Kalrez pump
  DO NOT USE: All hydrocarbons

Operation Instructions:

1. Follow all instructions from chemical manufacturer.
   Fill the tank with water and the advised percentage of chemical concentrate.

2. With ball valve (HV60) in the closed position, plug an air line into the air fitting (AP25).

3. Slowly open the ball valve (HV60) completely.

4. Adjust the needle valve (NV14Y) to desired wetness or dryness of foam following the steps below:
   a. Close needle valve completely in clockwise direction.
   b. Open needle valve in counter-clockwise direction 3 complete turns.
   c. Continue to open valve in ¼ turn increments allowing 30 seconds between adjustments until proper consistency of foam is achieved.

After Use Instructions:

1. Flush the unit with fresh water for 5 minutes.
2. Disconnect the air line from the air fitting (AP25) and relieve any remaining pressure in the system by opening the discharge ball valve (HV60).
3. Close the ball valve (HV60) after all pressure has been relieved from the system.

Maintenance Instructions:
To keep your portable tank foamer operating properly, periodically perform the following maintenance procedures:

• Check the air pump (P56/P56K/P56V) for wear and leaks.
• Inspect hoses for leaks or excessive wear. Make sure all hose clamps are in good condition and properly secured.
• Replace filter (AFR25) in regulator (R25) as needed.
• Check the suction tube and screen for debris and clean as needed.
• Drain compressor tank on a regular basis to ensure proper operation of pump.

Troubleshooting Instructions:

• Check to ensure the discharge hose is uncoiled properly, and that there are no kinks that could obstruct fluid flow.

• Check air regulator bowl (ABR25) for debris such as water, oil, or rust particles. Clean by unthreading the air regulator bowl from the air regulator (R25).

• If needle valve (NV14Y) valve is open too far, the pump (P56/P56K/P56V) will cycle improperly due to lack of air pressure. If this occurs, reset needle valve as described in Operation Instruction #4.

• Make sure proper foaming chemical and concentration is being used.

• If air passes through the pump (P56/P56K/P56V) without cycling, the pump needs to be replaced.

• If foam solution backs up into air regulator bowl (ABR25), the check valve (CV38) needs to be replaced.

• If foam comes out wet, no matter where the needle valve (NV14Y) is positioned, the check valve (CV38) may need to be replaced.

• Check for proper air pressure on air gauge (AG100). Air regulator (R25) is factory set at 50 psi (3.4 bar). Operating range is 40 to 80 psi (3 to 5 bar) with 5 to 10 CFM (141.64 to 283.30 l/min)

• If the unit foams at a reduced pressure:

  • Check the air compressor supplying the unit. If the pressure is less than 40 psi, turn the foam unit off until the compressor can catch up.
  • If the air supply is 50 psi (3.4 bar) or above, check the AG100, which should read near 50 psi (3.4 bar). If the AG100 is more or less than 50 psi (3.4 bar), adjust the pressure by turning the knob on the top of the air regulator (R25).
  • If both of the above are okay, the stainless steel mixing mesh (SS-MESH) could be plugged. Remove and clean it by following the instructions below:
    1. Be sure the foam unit is not plugged into an air supply and be sure to relieve all stored pressure in the unit by having the ball valve (HV60) in the open position.
    2. Remove the stainless adaptor (SSA12) from the tee fitting (SST12HB38).
    3. Remove the screen and the mixing mesh from inside the tee fitting (SST12HB38).
    4. Clean any particles from the mixing mesh and the screen.
    5. Replace the mixing mesh and then the screen into the back of the tee and screw the stainless adaptor back into the tee. It is recommended to use a pipe thread sealant when reinstalling the stainless adaptor back into the tee fitting (SST12HB38). If the mixing mesh has a lot of foreign particles in it, make sure the strainer (STR38-IL) is still in place.

• Check for plugged strainer (STR38-IL). Replace strainer if necessary. Strainer must be used.

PIN
DFP7-C| 7 INCH FILL CAP POLYPRO BLACK
DFP7-F| 7 INCH TANK LID FLANGE POLYPRO
DFP7-PIN| HINGE PIN FOR DFP7-C & DFP7-C
DFP7-C-BL| 7 INCH FILL CAP POLYPRO BLUE PANTONE
DFP7-C-GN| 7 INCH FILL CAP POLYPRO GREEN PANTONE
DFP7-C-RD| 7 INCH FILL CAP POLYPRO RED PANTONE
DFP7-C-YL| 7 INCH FILL CAP POLYPRO YELLOW PANTONE
DP-A| DRAIN PLUG ASSEMBLY INCLUDES DRAIN PLUG & GASKET
DP| FRONT DRAIN PLUG FOR PORTABLE UNIT POLYPRO
DP-G| FKM LATHE CUT 60 DUROMETER FKM
DP-INSERT| 304 STAINLESS DRAIN PLUG INSERT
EC14-2| OETIKER CLAMP 13.8
EC75| OETIKER CLAMP-12/04/07
F3455-L| SS CRIMP FERRULE 1.90inches X 1.5 inches LONG
FW38X78| FLAT WASHER 3/8X7/8 X.050
FWAX15| FLAT AXLE WASHER
FWP12| 7/8 ID X 1.50D X0.05 THK SSFW
FWP14| C-816 1/2in SS WASHER
H14B-H| 1/4 INCH BLUE HOSE – Available per ft.
H34B-H| 3/4 INCH BLUE HOSE – Available per ft.
H38B-H| 3/8 INCH BLUE HOSE – Available per ft.
HBSS1234| STAINLESS HOSE BARB 1/2 X 3/4
HBSS1438| STAINLESS HOSE BARB 1/4 MPT X 3/8 BARB
HBSSEL1438| S.S. HOSE BARB ELBOW 1/4 INCH NPT X 3/8 HOSE BARB
HBSSEL1814| 304 S.S. ELBOW 1/8 INCH NPT X 1/4 INCH HOSE BARB
HHPB3414| HEX HEAD POLY REDUCER BUSHING 3/4 X 1/4
---|---
HHSB1238| HEX HEAD S.S. REDUCER BUSHING 1/2in X 3/8
HV60| 1/2in STAINLESS BALL VALVE – w/ WELDED NUT
NV14Y| FLOW CONTROL VALVE- INCLUDES BLACK KNOB
NV14Y-HIVOL| KNOB FOR 2839-1/4 NEEDLE VALVE
P56| 5700 PUMP WITH SANTOPRENE SEALS – INCLUDES HOSE BARBS, AIR FITTING, AND AIR PORT
P56K| 5700 PUMP WITH KALREZ SEALS – INCLUDES HOSE BARBS, AIR FITTING, AND AIR PORT
P56V| 5700 PUMP WITH VITON SEALS – INCLUDES HOSE BARBS, AIR FITTING, AND AIR PORT
2075610313| Polypro G57 Air Port x HB Straight, w/ Viton o-ring
HB14P| 1/4in BRASS HB AIR FITTING /G57/P56
H85638| HOSE BARB FOR P56 PUMP
H85638K| HOSE BARB FOR P56K PUMP
HB5638V| HOSE BARB FOR P56V PUMP
P56-BRKT| PUMP BRACKET- STAINLESS STEEL
P56-BRKT-SCREW| HI LO SCREW FOR RETAINING P56-BRKT
PLPF| PORTABLE FOAM ER BACK PLATE W/ HINGE AND HOLES
PLPF-PIN| 302 STAINLESS PORTABLE PLATE HINGE PIN
PVCV34FM| PVC VALVE 3/4in FPT X 3/4in MPT
PW10| 3/4in BLACK POLY PRO X 10in – FPTBE – SCH.80
R25| AIR REGULATOR INCLUDES AIR FILTER AND BOWL
AFR25| AIR FILTER for R25
ABR25| METAL AIR BOWL for R25
5142058-VS| 1/4-20 X 5/8 PHIL TRUSS MACHINE SCREW 18-8 W/#516 VIBRASEAL ORANGE PATCH
S5161812| 5/16-18 x 1/2 Phil Pan 18-8
SN1212| 1/2in HEX STAINLESS STEEL NIPPLE
SSA14| S.S. 304 MALE/FEMALE ADAPTOR 1/4 NPT X 1/4 NPT
SSAXLE20.5| S.S. AXLE 20.5 INCHES LONG BY 5/8 INCH IN DIAMETER DRILLED AND BEVELED
SSC38| WORM GEAR CLAMP, S/S (.25-.63)
SST12HB38| STAINLESS TEE COMBO Inin FPT X 3/8 in BARB WITH SSST AND S.S. MESH
SS-MESH| STAINLESS STEEL MESH WITH SSST FOR REPLACEMENT
SW| SCREEN DISC .687 DIA. 10 X 10 MESH @ .020 DIA.
SSP12| STAINLESS STEEL AXLE PLATE – 2.5 inch X 1 inch – 2 HOLE
5T80203| VEEJET NOZZLE, 80200
STR38-IL| IN LINE STRAINER 3/8 BARB 20 MESH 304 SS EDPM GSKT
TANK-25N| 25 GALLON PORTABLE UNIT NATURAL IN COLOR
TW916| 1/2 INT TOOTH L/W 410SS
W15| NONMARKING WHEEL FOR PORTABLE UNITS
W387| S.S. 304 SPRAY WAND 3/8in MPT X Tin LONG – THREAD ON ONE END
WS-20CFM| TSUNAMI WATER SEPARATOR 20 CFM

Model Number: 925N, 925N-K, 925N-V and related units
11042014

References

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