Flow controllers provide a stable flow rate under varying pressure. VICI flow controllers are precision machined from aluminum or stainless bar stock to eliminate the contamination or porosity often found in die-cast parts. Positive flow shut-off is provided by an integral Viton®-sealed adjustment valve.
Standard materials of construction are aluminum body, brass operators, and Viton seals and diaphragm. A stainless steel body is available for use in ultrapure or corrosive systems, and either body may be ordered with a stainless steel diaphragm. Gas flow controller models include:
- Upstream-referenced flow controllers - to maintain the flow rate as long as the upstream (inlet) pressure is held constant.
- Adjustable span (Model 202)
- Fixed span (Model 100)
- Downstream-referenced flow controllers - to maintain a constant flow under constant downstream (outlet) pressure.
- Fixed span (Model 300)
NOTE: With all our flow controllers, the inlet pressure must exceed the outlet pressure by 10 psi
