Model 401 PTFE Flo-Controller 
Description
The Model 401 sets the standard in flow automation. Imagine a unit, deep in your system,
that will control flow rates remotely. No adjusting manual needle valves every few hours.
No waste of expensive chemicals. Your interface (maybe hundreds of feet away) can provide
the Model 401 with a proportional 4-20 mA signal, and the 401 will do the rest. If your
pressure fluctuates, the Model 401 automatically opens and closes its internal valve to
maintain a constant flow rate. Only Teflon® PTFE brand resin, Kal-Rez®, and sapphire
wetted parts - compatible with solvents, acids like hydrofluoric, or alkalines. Imagine
blending chemicals with incredible precision, never wasting a drop. Imagine never again
having to make small, abstract adjustments to your valves. Imagine a system so easy to
integrate that you’ll never look back. The Model 401 Flo-Controller...because smart
companies need smart tools.
The Model 401 has two components - the valve unit and the control unit. The valve unit is sealed and all flow connections are made to it. The control unit connects to the valve unit via the standard 10 foot cable. This control unit has a terminal strip where all electrical connections are made. A DIN rail clip is provided for easy mounting of the control unit. An integrated digital display and status LED’s inform the user of flow rate, setpoint, error conditions, etc.
Wetted Parts
Wetted Parts:Teflon®
PTFE brand resin, Kal-Rez®,
and sapphire.
Ranges
| Model Number | Flow Range | Typical Diff. Pressure Range | Standard Fittings | Valve Unit Dimensions |
| 401-A100 | 15-100 mL/minute | 12-30 psi | 1/4" male flare | 4.8"x8.3"x3.3" |
| 401-A500 | 50-500 mL/minute | 12-30 psi | 3/8" male flare | 4.8"x8.3"x3.3" |
| 401-A1000 | 100-1000 mL/minute | 12-30 psi | 3/8" male flare | 4.8"x8.3"x3.3" |
| 401-A2000 | 0.2-2.0 L/minute | 12-30 psi | 3/8" male flare | 4.8"x8.3"x3.3" |
| 401-A5000 | 0.4-5.0 L/minute | 12-35 psi | 1/2" male flare | 4.8"x8.3"x3.3" |
| 401-A8000 | 0.6-8.0 L/minute | 12-35 psi | 1/2" male flare | 4.8"x8.3"x3.3" |
| 401-A10000 | 1.0-10.0 L/minute | 12-35 psi | 1/2" male flare | 4.8"x8.3"x3.3" |
Options and Accessories
Available Signal Configurations for
the Model 401- Three signal configurations are available:
| Configuration Suffix | Power Requirement | Input/Output Signal Type |
| None | 24 VDC, 1.0 A | 4-20 mA |
| 401-Axxxx-5 | 24 VDC, 1.0 A | 1-5 VDC |
| 401-Axxxx-10 | 24 VDC, 1.0 A | 0-10 VDC |
Example: To order a Model 401 for
200-2000 mL/minute with 0-10 VDC inputs and outputs, order a 401-A2000-10.
To order a Model 401 for 15-100 mL/minute with 4-20 mA inputs and outputs, order a 401-A100.
Custom Cable Lengths - Standard
valve units come with 10 feet of cable; order custom lengths (up to 25 feet) to suit
your needs
Kal-Rez - Reg TM
E.I. Dupont de Nemours Co.
Teflon® is a registered trademark of
DuPont. Only DuPont makes Teflon®.