Blue-White - Chemical metering and fluid measurement solutions; chemical metering pumps, peristaltic pumps, diaphragm pumps, multi-diaphragm pumps, flow meters, flowmeters, variable area flow meters, paddlewheel flow meters, ultrasonic flow meters, engineered skid systems, single skid system, duplex skid system, triplex skid system, water analyzers...


FLEXFLO® Peristaltic Metering Pump

Simplify chemical feed with the FLEXFLO® A2 Peristaltic Metering Pump.  This rugged and compact pump features a gentle, low-shear pumping action, making it an ideal choice for dosing shear-sensitive or gaseous fluids.  The A2 does not require check valves, seals, or other ancillary equipment to function, reducing maintenance intervals and process downtime.

Remote control signal options include Remote Start/Stop, Flow Verification, Pulse, and 4-20mA.

Technical Overview:

.02 - 21.23
.07 - 80.4
1.1667 - 1340
125 PSI (8.6 Bar)
Enclosure Rating
NEMA 4X (IP66)
CE, cETLus, RoHS
Control Methods
Manual, Remote Analog/Digital
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:
  • Operator friendly digital controls with backlit LCD displays motor speed, input signal values, service, and alarm status
  • Inputs include: 4-20mA and pulse inputs for remote external speed control and either powered 6-24 VDC or non-powered dry contact closure for remote start/stop
  • Outputs: one 250V/3A relay to monitor TFD (Tube Failure System) and FVS (Flow Verification System), one 4-20mA analog signal scalable to the motor speed and one relay output for run status
  • Compatible with Blue-White’s output Flow Verification Sensor (FVS) system. Sensor is sold separately
Superior Design:
  • 2 Year Warranty
  • 100:1 turndown ratio
  • NEMA 4X (IP66) wash-down, chemically resistant powder coated 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
Optional Components Available:
  • Mounting Extended Brackets (72000-380) – 1 Pair, SS, 4 SS Screws
What’s Included:
  • A2 Peristaltic Metering Pump
  • Two tube assemblies
  • Discharge injection fitting with check valve
  • With “S” 3/8” OD x ¼” ID tubing compression type connections:
    • Suction tube – clear PVC – 10′ length (3/8″ OD, 1/4″ ID)
    • Suction strainer
    • Suction ceramic weight
    • Discharge tube – opaque polyethylene – 10′ length (3/8″ OD, 1/4″ ID)
  • With “B” ½” hose barb and “M” MNPT type connections:
    • Suction strainer
    • #5 hose clamp (“B” Only)
  • With “C” Tri-clamp and “Q” Quick Disconnect connections:
    • No accessories provided
  • Tube installation tool
  • Mounting hardware kit
  • Junction box connectors


Maximum Working Pressure
  • 125 psig (8.6 bar)
Maximum Fluid Temperature
  • 185 °F (85 °C)
Maximum Ambient Temperature
  • 14 °F to 115 °F/ -10 °C to 46 °C
Maximum Viscosity
  • 12,000 Centipoise
Maximum Suction Lift
  • 30 ft. Water at sea level (14.7 atm psi)
Operating Voltage
  • 115VAC/60Hz, 1ph (1.5 Amp Maximum)
  • 230VAC/60Hz, 1ph (0.7 Amp Maximum)
  • 220VAC/50Hz, 1ph (1.0 Amp Maximum)
  • 240VAC/50Hz, 1ph (1.0 Amp Maximum)
  • 230VAC/50Hz, 1ph (1.0 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)
  • Brushed DC, 1/8 H.P.
Duty cycle
  • Continuous
Motor Speed Adjustment Range
  • 100:1, (1.0% – 100% motor speed) Max. rpm = 130
  • Backlit LCD, UV resistant
  • Eight button positive action tactile switch keypad
Maximum Overall Dimensions
  • 7-1/2” W x 10-1/4” H x 14” D (19 W x 26 H x 35.6 D cm)
Product Weight
  • 28.4lb. (12.9 Kg)
Approximate Shipping Weight
  • 35 lb. (15.9 Kg)
  • NEMA 4X (IP66)
RoHS Compliant
  • Yes
  • cETLus, CE



Replacement Parts

ImageNameCatalog Number


A2 Instruction Manual – 80000-480
5.06 MB March 8, 2023
A2 M2 Firmware Update Instructions – 80000-494
5.15 MB February 8, 2022
A2 Replacement Parts List
513 KB February 10, 2022
A2 Technical Data Sheet – 85000-114
726.55 KB January 3, 2023
Flex-A-Prene Technical Data Sheet – 85000-123
248.83 KB February 8, 2022
Flex-Pro – A2 Engineering Spec Sheet
158.00 KB February 10, 2022
Flex-Pro A2F Firmware Update v2.14
9.59 MB February 10, 2022
Flex-Pro A2V Firmware Update v2.14
9.59 MB February 10, 2022
FLEXFLO Industrial Comparison Chart
3.31 MB July 20, 2022
Industrial Accessories Guide – 85000-179
994.07 KB June 2, 2022
Industrial Catalog 2023 – 80000-707
17.00 MB February 9, 2023
Industrial Tubing Selection Guide – 85000-120
0.98 MB February 8, 2022

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