It is used together with choke manifold for deprivation of free gas in drilling fluid and has application in under-balance drilling and treatment of drilling fluid containing hydrogen sulfide gas. Model YQ1000 YQ1200 FYQ Diameter of tank shell (mm) 1,000 1,200 1,200 Diameter of flow-feeding pipe (mm) 125 150 150 Diameter of air outlet pipe (mm) 200 200 200 Diameter of discharging tube (mm) 200 250 250 Tank bearing pressure (MPa) 1.0 1.2 1.2 Handling capacity of liquid (m3/h) 200 340 340 Remarks (null) (null) Sulfur-resisting Type