FLEXFLO® Peristaltic Metering Pump

Experience next-level chemical metering with the FLEXFLO® A4 Peristaltic Metering Pump. The A4 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.

A4 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 .01 – 158.5 Enclosure Rating NEMA 4X (IP66)
LPH .04 – 600 Standards CE, cETLus
mL/min .6667 – 10000 Control Methods Manual, Remote Analog/Digital, EtherNet/IP, Modbus TCP/IP, PROFIBUS
Pressure 125 PSI (8.6 Bar) Power Supply 100 to 240VAC-50/60Hz



  • 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
    • Alarm Outputs
    • FVS
    • Relay Ouput

Superior Design:

  • 2 Year Warranty
  • 2,500:1 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:

  • A4 Peristaltic Metering Pump
  • Two tube assemblies
  • Discharge injection fitting with check valve
  • With “B” ½” hose barb and “M” M/NPT type connections:
    • Suction strainer
    • #5 hose clamp (“B” only)
  • Tube installation tool
  • Mounting hardware kit
  • Junction box connectors


Maximum Working Pressure
125 psig (8.6 bar)
Note: see individual pump tube assembly maximum pressure ratings.
Maximum Fluid Temperature
3/8” OD x 1/4” ID tubing connections: 130 °F (54 °C)
M/NPT connections: 185 °F (85 °C)
Note: see individual pump tube assembly max temperature ratings.
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)

Maximum Viscosity
12,000 Centipoise
Maximum Suction Lift
30 ft. Water at sea level (14.7 atm psi)
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)
Brushless DC
Motor Speed Adjustment Range
2,500:1 (0.04% – 100%) Max rpm = 125 rpm
Motor Speed Adjustment Resolution
0.1% increments > 1% motor speed and < 100%
0.04% increments < 1% motor speed
5” touchscreen color LCD, UV resistent
Display Languages
English, Spanish, French, German, and Portuguese selectable
Programmable 6-digit password
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)
Approximate Shipping Weight
50 lb. (22.68 Kg)
NEMA 4X (IP66) wash-down, chemically resistant enclosure
RoHS Compliant
cETLus, CE