Q-MAX MAX-FLO MY1-25 METAL Series User manual

AIR-OPERATED DOUBLE DIAPHRAGM PUMP
Assembly, Installation & Operation Manual
V1.0 2021
MY1 METAL & NON-METAL SERIES
25
MAX-FLO

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
2
TABLE OF CONTENTS
1. Read Me First ................................................................................................... 3
Chemical Reaction Disclaimer
Safety Precautions
Caution
2. Pump Specications ........................................................................................ 4
Explanation of Pump Nomenclature

Performance Curve

3. Recommended Installation Guide ................................................................... 6
4. Troubleshooting Guide ..................................................................................... 7
5. Dimension Drawing .......................................................................................... 9
6. Exploded View (AL Center Block) ................................................................. 10
Non-Metal
Aluminum
Stainless Steel
7. Part List (AL Center Block) ............................................................................ 11
8. Exploded View (PP Center Block) ................................................................. 13
Non-Metal
Aluminum
Stainless Steel
9. Part List (PP Center Block) ............................................................................ 14

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 3
READ ME FIRST - IMPORTANT INFORMATION
CHEMICAL REACTION DISCLAIMER
The user must exercise primary responsibility in selecting the product’s materials of
             
The user may consult manufacturer and a manufacturer’s representative/distributor agent to
󰀨
chemical compatibility.
However neither manufacturer nor a gent shall be liable for product damage or failure, injuries,
󰀨

with the product’s components.
SAFETY PRECAUTIONS
READ THIS MANUAL COMPLETELY BEFORE INSTALLING AND OPERATING THIS PUMP.
FAILURE TO FOLLOW THESE PRE-CAUTIONS CAN RESULT IN SERIOUS INJURY OR
DEATH.
WARNING:

WARNING: Do not exceed maximum pressure stated on the pump serial number sticker. Pump
exhaust may be loud and contain particles. Wear appropriate ear and eye protection. In the
󰀪
hazardous or toxic pipe exhaust to appropriate safe area.
WARNING: Chemical Hazard. This pump is used for transferring many types of potentially
dangerous chemicals. Always wear protective clothing, eye protection and follow standard safety
procedures when handling corrosive or personally harmful materials. Proper procedures should
be followed for draining and decontaminating the pump before disassembly and inspection of
the pump. There may be small quantities of chemicals present during inspection.
WARNING: Before maintenance or repair, close the compressed air supply valve, bleed the
pressure and disconnect air line from the pump. Discharge line may be pressurized. Any
pressure must be relieved before service.
CAUTION
1. To help avoid unnecessary damage to the pump, do not allow pump to run dry for long
periods of time.
2. Use only genuine Pump-Fit replacement parts to assure compatible pressure rating and
longest service life.
3. 
each use to prevent damage.
4. nstall the pump in a vertical position or the pump may not prime properly.
5. Re-torque all fasteners before operation. Creep of housing and gasket materials may cause

6. Unpack the pump and examine for any signs of shipping damage. If damage is detected,
save the packaging and notify the carrier immediately.

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
4
PUMP SPECIFICATIONS
EXPLANATION OF PUMP NOMENCLATURE
TECHNICAL SPECIFICATIONS
Max ow (l/min) 157
Max head (m) 84
Max air inlet pressure (bar) 8.4
Max particle size (mm) 4
Suction lift (mwc)
Dry:
Wet:
4
8
Fluid ports connection (inch) Plastic:
Metal
1” ANSI #150 Flange
1” 
Air inlet port (inch) 
Wetted end (weight) Polypropylene:
PVDF:
Aluminium:
Stainless steel:
9 kg
12 kg
11 kg
16 kg
PERFORMANCE CURVE
0
2
4
6
8
Pressure (bar)
0
28
56
84
112
10 140
Pressure (psi)
020 40 60 80 100 120 140
05.2 10.4 15.6 20.8 26.0 31.2 36.4
160
41.6
Q (l/min)
Q (usgpm)
Measured with 20°C Water Air Consumption (m3/min)Air Pressure (bar)
1.12m3/min (40scfm)
0.84m3/min (30scfm)
0.28m3/min (10scfm)
0.56m3/min (20scfm)
MAX-FLO
Special
Code
-//
25 - 1”
CONNECTION SIZE
X X
CENTER BLOCK
P - Polypropylene
A - Aluminium
P - Polypropylene
K - PVDF
A - Aluminium
4 - SUS304
6 - SUS316
L - SUS316L
WETTED BODY
X X X
B - Buna-N
H - Hytrel
R - Santoprene
V - Viton
T - PTFE
DIAPHRAGM
H - Hytrel
R - Santoprene
V - Viton
T - PTFE
VALVE BALL
P - Polypropylene
K - PVDF
H - Hytrel
R - Santoprene
V - Viton
A - Aluminium
4 - SUS304
6 - SUS316
L - SUS316L
VALVE SEAT
- 25MY1

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 5
YOUR PUMP INFORMATION
Record the model number and serial number below for future reference. This is important
information when ordering replacement parts or when technical assistance is required.
Your Pump Model #:
Your Serial #:
MATERIAL PROFILE
Diaphragm Material
CAUTION: Operating temperature limitations are as follows:
Operating Temperature
Max. Min.
Viton: 
 177°C -40°C
PTFE (Teon): 


176°C 4°C
Santoprene: Good abrasion resistance, chemical resistance and heat resistance, suitable for
general acid and alkali, not suitable solvent. Can replace the EPDM/EPR material. 104°C -29°C
Hytrel: 
materials. 104°C -29°C
EPDM: Abrasion resistance, aging resistance, ozone resistance , suitable for general acid and
alkali. 122°C -40°C
Buna-N: Widely used in gasoline and other oil products. Suitable for use at room temperature. 100°C -40°C
GE: Better abrasion resistance than Hytrel, the same chemical resistance as Buna-N. 104°C -29°C
Note: The maximum and minimum temperature is the limited operating temperature of these materials. Temperature and
pressure will a󰀨ect the diaphragm life. Operating within suggested maximum and minimum temperature will maximise
the lifespan of the pump.
Pump Body Material
CAUTION: Operating temperature limitations are as follows:
Operating Temperature
Max. Min.
PP: Medium abrasion resistance, good chemical resistance, good versatility, especially for
common acid-base. 80°C -4°C
POM: Good solvent resistance, abrasion resistance. Low friction, low moisture absorption. 176°C 4°C
PVDF: Strong chemical resistance, crush resistance, abrasion resistance. good corrosion
resistance for acid, alkali and variety of organic solvents. 93°C 4°C

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
6
RECOMMENDED INSTALLATION GUIDE
1
2
3
Surge Suppressor
Pressure Gauge
󰀨
Check Valve
Pipe Connection

󰀪

Vacuum Gauge
Flexible Connector
󰀨
Drain Port
Suction
Unregulated Air
Supply to Surge
Suppressor
󰀨
Filter Regulator
P/N: 020.V107.000
Discharge
Air Inlet
Air Dryer
Flexible Connector
Drain Port
CAUTION: The air exhaust
should be piped to an area
for safe disposition of the
product being pumped, in the
event of a diaphragm failure.
Available Accessories:
1. Surge Suppressor
2. Filter/Regulator
3. Air Dryer
Note: Surge Suppressor and
Piping must be supported

INSTALLATION AND START-UP: Locate the pump as close to the product being pumped as
                
suction line diameter.
AIR SUPPLY: 󰀩
achieve desired performance. A pressure regulating valve should be installed to insure air supply
pressure does not exceed recommended limits.
AIR VALVE LUBRICATION:The air distribution system is designed to operate WITHOUTlubrication.
This is the standard mode of operation. If lubrication is desired, install an air line lubricator set to

consumes. Consult the Performance Curve to determine air consumption.
AIR LINE MOISTURE:Water in the compressed air supply may cause icing or freezing of the
exhaust air, causing the pump to cycle erratically or stop operating. Water in the air supply can be
reduced by using a point-of-use air dryer.
AIR INLET AND PRIMING:󰀨


󰀩

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 7
TROUBLESHOOTING GUIDE
Symptom: Potential Cause(s): Recommendation(s):
Pump Cycles
Once

meets or exceeds air supply

Increase the inlet air pressure to the pump. Pump is designed for 1:1

Air valve or intermediate gaskets
installed incorrectly. Install gaskets with holes properly aligned.
Bent or missing actuator plunger. Remove pilot valve and inspect actuator plungers.
Pump Will Not
Operate / Cycle
Pump is over lubricated. Set lubricator on lowest possible setting or remove. Units are designed
for lube free operation.
 

Check air distribution system. Disassemble and inspect main air distribution valve, pilot valve and pilot
valve actuators.
Discharge line is blocked or
clogged manifolds.
Check for inadvertently closed discharge line valves. Clean discharge
manifolds/piping.

meets or exceeds air supply

Increase the inlet air pressure to the pump. Pump is designed for 1:1

󰀪 󰀪

󰀪
Disassemble pump chambers. Inspect for diaphragm rupture or loose
diaphragm plate assembly.
Pump chamber is blocked. 
obstructions.
Pump Cycles and
Will Not Prime or
No Flow
Cavitation on suction side. 
Check valve obstructed. Valve

sticking.
Disassemble the wet end of the pump and manually dislodge
obstruction in the check valve pocket. Clean out around valve ball cage
and valve seat area. Replace valve ball or valve seat if damaged. Use
heavier valve ball material.





or attacked by product. Check Chemical Resistance Guide for compatibility.
Check valve and/or seat is worn
or needs adjusting.
Inspect check valves and seats for wear and proper setting. Replace if
necessary.
Suction line is blocked. 
strainers.
Excessive suction lift. 
the pump in most cases.
Suction side air leakage or air in
product. Visually inspect all suction-side gaskets and pipe connections.

󰀪
Disassemble pump chambers. Inspect for diaphragm rupture or loose
diaphragm plate assembly.
Pump Cycles
Running Sluggish
/ Stalling, Flow
Unsatisfactory
Over lubrication. Set lubricator on lowest possible setting or remove. Units are designed
for lube free operation.
Icing. 󰀪
drier.
Clogged manifolds. 

meets or exceeds air supply

Increase the inlet air pressure to the pump. Pump is designed for 1:1

Cavitation on suction side. 
 Check the air line size, length, compressor capacity.
Excessive suction lift. 
the pump in most cases.

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
8
Symptoms Potential Cause(s): Recommendation(s):
Pump Cycles
Running Sluggish
/ Stalling, Flow
Unsatisfactory
(cont.)
Air supply pressure or volume
exceeds system hd.


Undersized suction line. Meet or exceed pump connections.
Restrictive or undersized air line. Install a larger air line and connection.
Suction side air leakage or air in
product. Visually inspect all suction-side gaskets and pipe connections.
Suction line is blocked. 
strainers.

󰀪
Disassemble pump chambers. Inspect for diaphragm rupture or loose
diaphragm plate assembly.
Check valve obstructed. Disassemble the wet end of the pump and manually dislodge
obstruction in the check valve pocket.
Check valve and/or seat is worn
or needs adjusting.
Inspect check valves and seats for wear and proper setting. Replace if
necessary.
Entrained air or vapor lock in

Purge chambers through tapped chamber vent plugs. Purging the
chambers of air can be dangerous.
Product Leaking
Through Exhaust
Diaphragm failure, or diaphragm
plates loose.
Replace diaphragms, check for damage and ensure diaphragm plates
are tight.
Diaphragm stretched around
center hole or bolt holes.
Check for excessive inlet pressure or air pressure. Consult Chemical
Resistance Chart for compatibility with products, cleaners, temperature
limitations and lubrication.
Premature
Diaphragm Failure
Cavitation. Enlarge pipe diameter on suction side of pump.

pressure.
Move pump closer to product. Raise pump/place pump on top of tank to

Add accumulation tank or pulsation dampener.


Consult Chemical Resistance Chart for compatibility with products,
cleaners, temperature limitations and lubrication.
Incorrect diaphragm plates or
plates on backwards, installed
incorrectly or worn.
Check Operating Manual to check for correct part and installation.
Ensure outer plates have not been worn to a sharp edge.
Unbalanced
Cycling
Excessive suction lift. 
the pump in most cases.
Undersized suction line. Meet or exceed pump connections.

󰀪
Disassemble pump chambers. Inspect for diaphragm rupture or loose
diaphragm plate assembly.
Suction side air leakage or air in
product. Visually inspect all suction-side gaskets and pipe connections.
Check valve obstructed. Disassemble the wet end of the pump and manually dislodge
obstruction in the check valve pocket.
Check valve and/or seat is worn
or needs adjusting.
Inspect check valves and seats for wear and proper setting. Replace if
necessary.
Entrained air or vapor lock in
 Purge chambers through tapped chamber vent plugs.
TROUBLESHOOTING GUIDE (CONT.)

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 9
DIMENSION DRAWING
NON-METAL
Discharge 1” ANSI
#150 Flange
Air inlet

Suction 1” ANSI
#150 Flange
Air outlet

STAINLESS STEEL
Discharge
1” BSPT/NPT
Air inlet

Suction
1” BSPT/NPT
Air outlet

ALUMINUM
Discharge
1” BSPT/NPT
Air inlet

Suction
1” BSPT/NPT
Air outlet


MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
10
EXPLODED VIEW (AL CENTER BLOCK)
NON-METAL
M02
M03
M04
M05
M06
M07
M08
M09
M10
M11
M12
M15
M14 M13 254
M16M17
M19
M18
M01
2507
251-1
251-2251-3A
2509 2506 2505 2504
2501
253-1
2502
2503
252
ALUMINUM
M02
M03
M04
M05
M06
M07
M08
M09
M10
M11
M12
M15
M14 M13 254
M16M17
M19
M18
M01
2507
251-1
251-2251-3P
2509 2506 2505 2504
2501
253-1
2502
2503
252

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 11
EXPLODED VIEW (AL CENTER BLOCK) (CONT.)
PART LIST (AL CENTER BLOCK)
STAINLESS STEEL
Air End Parts
Part Number Description Quantity
M01-AL Air valve cap 1
M02-ST Air valve cap gasket 1
M03-PM Reversing switch 1
M03-CM
M04-SS Reversing pin 2
M05-VT Reversing pin O-ring 2
M06-PM Piston 2
M07-VT Piston V-ring 2
M08-AL Upper pilot valve 1
M09-VT Pilot valve O-ring 1
M10-PM Bottom Pilot valve 1
M10-CM
Air End Parts
Part Number Description Quantity
M11-CM Valve plate 1
M11-SS
M12-ST Valve plate gasket 1
M13-ST Air chamber gasket 2
M14-PM Reversing pin bushing 2
M15-PM Piston bushing 2
M16-PM Rod bushing 2
M17-VT Rod V-ring 2
M18-AL Center block 1
M19-PP 󰀪 1
M02
M03
M04
M05
M06
M07
M08
M09
M10
M11
M12
M15
M14 M13 254
M16M17
M19
M18
M01
2507
251
2509 2506 2505 2504
2501
253
2502
2503
252

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
12
Wet End Parts
Part Number Description Quantity
251-SS Discharge Manifold 1
251-LL
251-1-PP
Upper Elbow 2251-1-AL
251-1-KV
251-2-PP
TEE 2251-2-AL
251-2-KV
251-3P-HY
Cylinder O-Ring
 4
251-3P-ST
251-3P-TF
251-3A-HY
 4251-3A-ST
251-3A-TF
253-SS Suction Manifold 1
253-LL
253-1-PP
Bottom Elbow 2253-1-AL
253-1-KV
252-KV
Fluid Chamber 2
252-PP
252-AL
252-SS
252-LL
254-AL Air chamber 2
2501-TF
Valve Ball 4
2501-ST
2501-HY
2501-BN
2501-EP
2501-SS
2501-LL
2501-CM
Wet End Parts
Part Number Description Quantity
2502-PP
Valve Seat 4
2502-AL
2502-TF
2502-ST
2502-HY
2502-BN
2502-EP
2502-VT
2502-SS
2502-LL
2503-TF
Seat O-Ring 4
2503-BN
2503-EP
2503-VT
2504-KV
Plate 2
2504-PP
2504-AL
2504-SS
2504-LL
2505-TF  2
2506-STR Supporting Diaphragm 2
2506-ST
Rubber Diaphragm 2
2506-HY
2506-BN
2506-EP
2506-VT
2506-GE
2507-AL Inner Plate 2
2509-SS Diaphragm Rod 1
PART LIST (AL CENTER BLOCK) (CONT.)

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 13
EXPLODED VIEW (PP CENTER BLOCK)
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
MA11 MA12 MA13 MA14
MA15
MA16
MA17
MA10-25
MA1
2507
251-1
251-2 251-3P
2509
2506 2505 2504
2501
253-1
2502
2503
252
NON-METAL
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
MA11 MA12 MA13 MA14
MA15
MA16
MA17
MA10-25
MA1
2507
251-1
251-2251-3A
2509
2506 2505 2504
2501
253-1
2502
2503
252
ALUMINUM

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my
14
EXPLODED VIEW (PP CENTER BLOCK) (CONT.)
PART LIST (PP CENTER BLOCK)
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
MA11 MA12 MA13 MA14
MA15
MA16
MA17
MA10-25
MA1
2507
251
2509
2506 2505 2504
2501
253
2502
2503
252
STAINLESS STEEL
Air End Parts
Part Number Description Quantity
MA1-KV Air valve housing 1
MA2-SS Plug locking plate 2
MA3-PM Piston 1
MA4-VT Piston V-Ring 2
MA5-VT Plug O-Ring 2
MA6-KV Plug 2
MA7-PM Pilot valve 1
MA8-SS Valve plate 1
MA9-ST Air valve gasket 1
Air End Parts
Part Number Description Quantity
MA10-25-PP Center block 1
MA11-PM Reversing valve 5
MA12-VT Reversing shaft O-Ring 6
MA13-SS Reversing shaft 1
MA14-PM Rod locking plate 2
MA15-SS Snap ring 2
MA16-VT Rod V-Ring 2
MA17-PP 󰀪 1

MAX-FLO MY1-25 METAL & NON-METAL - Supreme Performance
Assembly, Installation & Operation Manual | www.qmax.com.my 15
Wet End Parts
Part Number Description Quantity
251-SS Discharge Manifold 1
251-LL
251-1-PP
Upper Elbow 2251-1-AL
251-1-KV
251-2-PP
TEE 2251-2-AL
251-2-KV
251-3P-HY
Cylinder O-Ring
 4
251-3P-ST
251-3P-TF
251-3A-HY
 4251-3A-ST
251-3A-TF
253-SS Suction Manifold 1
253-LL
253-1-PP
Bottom Elbow 2253-1-AL
253-1-KV
252-KV
Fluid Chamber 2
252-PP
252-AL
252-SS
252-LL
2501-TF
Valve Ball 4
2501-ST
2501-HY
2501-BN
2501-EP
2501-GE
2501-VT
2501-PC
2501-SS
2501-LL
2501-CM
Wet End Parts
Part Number Description Quantity
2502-PP
Valve Seat 4
2502-AL
2502-TF
2502-ST
2502-HY
2502-BN
2502-EP
2502-GE
2502-VT
2502-PC
2502-SS
2502-LL
2503-TF
Seat O-Ring 4
2503-BN
2503-EP
2503-VT
2504-KV
Plate 2
2504-PP
2504-AL
2504-SS
2504-LL
2505-TF  2
2506-STR Supporting Diaphragm 2
2506-ST
Rubber Diaphragm 2
2506-HY
2506-BN
2506-EP
2506-GE
2506-VT
2506-PU
2507-AL Inner Plate 2
2509-SS Diaphragm Rod 1
PART LIST (PP CENTER BLOCK) (CONT.)