Downstream-referenced fixed 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 span valve can adjust the flow range 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 control stem has a full 10 turns of resolution between zero flow and the maximum rate. When the controller is 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.
Brand | Vici Valco |
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Diameter | 1/8'' |
Material | Aluminum |
Type | Gas Flow Controller |
Variety | External Fitting |