Aerated Column Patents (Class 417/108)
- With pumped fluid velocity or flow responsive valve operating means (Class 417/110)
- Plural serially actuated valves (Class 417/111)
- With flexible pressure responsive sensing element (i.e., bellows, diaphragm, etc.) (Class 417/112)
- With pilot valve (Class 417/114)
- Valve member actuated responsive to absolute gaseous motive fluid pressure or flow rate (Class 417/115)
- Controlled by means responsive to liquid level accumulation in column (Class 417/116)
- Valve biased open by static pressure of pumped fluid (Class 417/117)