M4
FLEXFLO® Peristaltic Metering Pump
Experience next-level chemical metering with the FLEXFLO® M4 Peristaltic Metering Pump. The M4 combines accurate metering at discharge pressures up to 125 PSI, intuitive icon-based touchscreen controls, and IP-rated M12 connection ports that protect against moisture, dust, vibration, and any temperature change.
M4 remote control signal options include Pulse, 4-20mA, Modbus TCP, EtherNet/IP, and PROFIBUS for enhanced supervision and automation for critical metering and transfer applications.
Technical Overview:
GPH
.0028 - 158.5
LPH
.0108 - 600
mL/min
.1800 - 10000
Pressure
125 PSI (8.6 Bar)
Enclosure Rating
NEMA 4X (IP66)
Standards
cETLus, CE, NSF61
Control Methods
Manual, Remote Analog/Digital, EtherNet/IP, Modbus TCP/IP, Profibus
Power Supply
100 to 240VAC-50/60Hz
Literature
M4 Literature
Instruction Manuals
M4 Instruction Manual – 80000-617Technical Data Sheets
M4 Technical Data Sheet – 85000-158Guides
Tubing Selection GuideEngineering Specifications
M4 Engineering SpecificationsBrochures
M3 | M4 Brochure – 80000-714Catalog
Municipal Catalog 2023
3D Visualizer
Features and Benefits
Features
Benefits:
- Self-priming – even against maximum line pressure. By-pass valves are not required. Cannot vapor lock or lose prime. 30ft of suction lift. Gentle low shear pumping action.
- Tube Failure Detection (TFD) senses tube rupture by detecting chemical in the pump head. No false triggering – Patented
- Optional dual channel tube design for optimum performance and pressure capability
Communication and Interface:
- 5” touchscreen color LCD display
- User-friendly configurations
-
Control Methods:
- Manual Control
- 4-20mA Input
- Remote Start/Stop
- Pulse Input
- Frequency Input
- EtherNet/IP
- Modbus TCP/IP
- PROFIBUS
- Alarm Outputs
- FVS
- Relay Ouput
Superior Design:
- 5 Year Warranty
- 10,000:1 turndown ratio
- NEMA 4X (IP66) wash-down, chemically resistant enclosure
- Heavy duty rotor means no flexing and increased accuracy with no metal springs or hinges to corrode.
Safety Features:
- Tube Failure Detection (TFD) senses tube rupture preventing hazardous chemical spills
- Security programmable 6-digit password to prevent tampering
Optional Components Available:
- Mounting Extended Brackets (72000-380) – 1 Pair, SS, 4 SS Screws
What’s Included:
- M4 Peristaltic Metering Pump
- Two tube assemblies
-
With “B” ½” hose barb and “M” M/NPT type connections:
- Suction foot valve / strainer
- Tube installation tool
- Mounting hardware kit
Output
| Tube Material / Size | Feed Rate | MaxSpeed | MaxPressure | MaxTemperature | Required Roller Assembly | ||
| GPH | LPH | ML/Min | RPM | PSI (bar) | °F (°C) | Code | |
| Flex-A-Prene® | |||||||
| NH | .0028 – 28.5 | .0108 – 108 | .180 – 1800 | 125 | 125 (8.6) | 185 (85) | A4-MNH-R |
| NHL | .0028 – 28.5 | .0108 – 108 | .180 – 1800 | 125 | 65 (4.5) | 185 (85) | A4-MNH-R |
| NK | .0050 – 50.7 | .0192 – 192 | .320 – 3200 | 125 | 80 (5.5) | 185 (85) | A4-MNH-R |
| NHH | .0054 – 54.4 | .0204 – 204 | .340 – 3400 | 125 | 100 (6.9) | 185 (85) | A4-MNH-R |
| NHHL | .0054 – 54.0 | .0204 – 204 | .340 – 3400 | 125 | 65 (4.5) | 185 (85) | A4-MNH-R |
| NL | .010 – 100.0 | .0378 – 378 | .630 – 6300 | 125 | 50 (3.4) | 185 (85) | A4-MNL-R |
| NP | .015 – 158.5 | .0600 – 600 | 1.00 – 10000 | 125 | 30 (2.1) | 185 (85) | A4-MNL-R |
| Flex-A-Chem® | |||||||
| TH | .0025 – 25.40 | .0096 – 96 | .1600 – 1600 | 125 | 30 (2.1) | 130 (54) | A4-MTH-R |
| TK | .0054 – 54.00 | .0204 – 204 | .3400 – 3400 | 125 | 30 (2.1) | 130 (54) | A4-MTH-R |
| TKK | .0126 – 126.0 | .0477 – 477.0 | .800 – 8000 | 125 | 30 (2.1) | 130 (54) | A4-MTH-R |
| Flex-A-Thane® | |||||||
| GH | .0039 – 39.6 | .0150 – 150 | .250 – 2500 | 125 | 65 (4.5) | 130 (54) | A4-MGH-R |
| GHH | .0071 – 71.0 | .0269 – 269 | .448 – 4480 | 125 | 65 (4.5) | 130 (54) | A4-MGH-R |
| GK | .0055 – 55.5 | .0210 – 210 | .350 – 3500 | 125 | 65 (4.5) | 130 (54) | A4-MGH-R |
| GKK | .010 – 100.0 | .0378 – 378 | .630 – 6300 | 125 | 65 (4.5) | 130 (54) | A4-MGH-R |
Specifications
Maximum Working Pressure (excluding pump tubes)
- 125 psig (8.6 bar)
- NOTE: See individual pump tube assembly max. pressure ratings.
Maximum Fluid Temperature (excluding pump tubes)
- 185 °F (85 °C)
- NOTE: See individual pump tube assembly max. temperature ratings.
Maximum Viscosity
- 12,000 Centipoise
Maximum Suction Lift
- 30 ft. Water, 0 psig (9.14 m, 0 bar)
Ambient Operating Temperature
- 14 °F to 115 °F (-10 °C to 46 °C)
Ambient Storage Temperature
- -40 °F to 158 °F (-40 °C to 70 °C)
Operating Voltage
- 115VAC/60Hz, 1ph (2.0 Amp Maximum)
- 230VAC/60Hz, 1ph (1.0 Amp Maximum)
- 220VAC/50Hz, 1ph (1.0 Amp Maximum)
- 240VAC/50Hz, 1ph (1.0 Amp Maximum)
- 230VAC/50Hz, 1ph (2.0 Amp Maximum)
Power Cord Options
- 115V60Hz = NEMA 5/15 (USA)
- 230V60Hz = NEMA 6/15 (USA)
- 220V50Hz = CEE 7/VII (EU)
- 240V50Hz = AS 3112 (Australia/New Zealand)
- 230V50Hz = BS 1363/A (UK)
Motor Brushless
- DC, 1/4 H.P.
Motor Speed Adjustment Range
- 10,000:1 (0.01% – 100% motor speed) Max RPM = 125
Motor Speed Adjustment Resolution
- 0.1% increments > 1% motor speed and < 100%
- 0.01% increments < 1% motor speed
Display
- 5” touchscreen color LCD, UV resistant.
Display Languages
- English, Spanish, French, German, and Portuguese selectable
Maximum Overall Dimensions
- 12-1/8”W x 15-1/4”H x 16-1/2”D (30.8W x 38.8H x 41.9D cm)
Product Weight
- 45.5 lb. (20.64 Kg)
Security
- Programmable 6-digit password
Approximate Shipping Weight
- 50 lb. (22.68 Kg)
Enclosure
- NEMA 4X (IP66) wash-down, chemically resistant enclosure
RoHS Compliant
- Yes
Standards
- cETLus, CE, NSF61
Videos
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Replacement Parts
| Image | Catalog Number | Description | Price | Buy |
|---|
Downloads
| Title | |||
|---|---|---|---|
|
Case Study: Water Treatment Plant Successfully Makes the Switch from Gas to Liquid Chlorine |
538.23 KB | March 13, 2023 | Download |
|
FLEXFLO Pump EDS File |
11 KB | February 21, 2024 | Download |
|
FLEXFLO Pump GDS File |
2 KB | February 21, 2024 | Download |
|
FLEXFLO® Municipal Comparison Chart |
4.10 MB | May 15, 2025 | Download |
|
M3 | M4 Brochure – 80000-714 |
4.02 MB | March 7, 2023 | Download |
|
M3 M4 Instruction Manual – 80000-465 [LEGACY] |
6.3 MB | April 15, 2024 | Download |
|
M3 M4 Technical Data Sheet – 85000-108 [LEGACY] |
591.92 KB | April 15, 2024 | Download |
|
M4 Engineering Specifications |
882.50 KB | November 4, 2024 | Download |
|
M4 Instruction Manual – 80000-617 [Deutsch] |
17.59 MB | June 20, 2025 | Download |
|
M4 Instruction Manual – 80000-617 [Español] |
15.81 MB | June 20, 2025 | Download |
|
M4 Instruction Manual – 80000-617 [Français] |
20.00 MB | June 20, 2025 | Download |
|
M4 Instruction Manual – 80000-617 [Nederlands] |
24.75 MB | June 20, 2025 | Download |
|
M4 Instruction Manual – 80000-617 [Português] |
16.54 MB | June 20, 2025 | Download |
|
M4 Instruction Manual – 80000-617 |
11.50 MB | May 5, 2025 | Download |
|
M4 Instruction Manual [Deutsch] – 80000-617 |
9.64 MB | December 22, 2022 | Download |
|
M4 Instruction Manual [Français] – 80000-617 |
35.07 MB | March 24, 2023 | Download |
|
M4 Replacement Parts List |
583.44 KB | February 10, 2022 | Download |
|
M4 Technical Data Sheet – 85000-158 [Deutsch] |
660.78 KB | March 7, 2025 | Download |
|
M4 Technical Data Sheet – 85000-158 [Español] |
672.63 KB | March 7, 2025 | Download |
|
M4 Technical Data Sheet – 85000-158 [Français] |
819.26 KB | March 7, 2025 | Download |
|
M4 Technical Data Sheet – 85000-158 [Nederlands] |
797.29 KB | March 7, 2025 | Download |
|
M4 Technical Data Sheet – 85000-158 [Português] |
759.18 KB | March 7, 2025 | Download |
|
M4 Technical Data Sheet – 85000-158 |
999 KB | April 15, 2024 | Download |
|
M4 Technical Data Sheet [Deutsch] – 85000-158 |
966.53 KB | December 22, 2022 | Download |
|
M4 Technical Data Sheet [Français] – 85000-158 |
568.95 KB | March 24, 2023 | Download |
|
Municipal Accessories Guide – 85000-178 |
1,021.20 KB | November 4, 2024 | Download |
|
Municipal Catalog 2025 – 80000-708 |
13.09 MB | May 16, 2025 | Download |
|
Municipal Products Brochure |
3.10 MB | May 9, 2025 | Download |
|
Municipal Tubing Selection Guide – 85000-119 |
985 KB | May 5, 2025 | Download |
|
New A4 M4 Roller Assembly |
8.69 MB | November 22, 2022 | Download |
|
Peristaltic Pump Tubing Brochure – 80000-726 |
3.75 MB | April 16, 2024 | Download |
|
Pump to Skid Adapter Kits – 85000-198 |
340.02 KB | August 6, 2024 | Download |
