Upstream-referenced adjustable span flow controller
The Model 202 maintains a constant flow rate as long as the upstream (inlet) pressure is held constant during downstream pressure fluctuations from column switching, temperature programming, sequence reversal, or backflushing even if the fluctuation is to within 10 psi of the supply pressure.
A user-variable span adjustment permits it to be used for a variety of flow ranges. The flow range is infinitely adjustable from a minimum flow as small as 5.0 mL/min up to a maximum flow of 1.6 L/min (N2 at 40 psi). After the span is adjusted, the flow controller has a full 10 turns of resolution between zero flow and the maximum rate. When equipped with a Spectrol digital dial, settings are reproducible to better than 1%.
The Model 202 comes standard with 1/8" NPT female pipe threads. Adapters to go from pipe to 1/16" OD tubing are included. Other fittings are available
NOTE: With all our flow controllers, the inlet pressure must exceed the outlet pressure by 10 psi.
|Type of knob/dial||Body material||Diaphragm material||Product No.|
|Standard control knob||Aluminum||Viton||FC22AV1K|
|Spectrol 3-digit dial||Aluminum||Viton||FC22AV1S3|
|Spectrol 4-digit dial||Aluminum||Viton||FC22AV1S4|