Miller | Smith Helium Flowmeter Regulator - CGA 580Features Filtered seats prevent contamination from entering the seating area, reducing repair costs and downtime. Filtered seats also reduce CO2 freeze up. Provides high argon flow capacity up to 55 SCFH. Sure Seat filtered high pressure seat assembly Series 20 single stage regulators are extremely durable and contain our exclusive Sure Seat filtered seat technology. Filtered seats prevent contamination from entering the seating area, reducing repair