Description Smith 30 Series Oxygen Regulator, 20 PSI - 30-20-540 Series 30 single-stage regulators are extremely durable and contain our exclusive Sure Seat™ filtered seat technology for extended seat and regulator life. Filtered seats prevent contamination from entering the seating area, reducing repair costs and downtime. These highly accurate regulators are manufactured with a rugged forged body, corrosion-resistant bright nickel-plated bonnet and a highly durable neoprene composite diaphragm. External Relief Valve Protects regulator from damage do to inadvertent high-pressure surge. Relief valve will release excessive pressure and automatically reset. Sure-Seat filtered high-pressure seat assembly Series 30 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 costs and downtime. Nickel-Plated Bonnet The nickel-plated bonnet, along with brass body, protects against corrosion. Shatter-Resistant Gauge Lenses 2.0 inch corrosion-resistant polished brass gauges with shatter-resistant polycarbonate lenses. Color-Coded Labels Identifies supply performance capabilities, easy gas service identification and technical information. Neoprene Composite Diaphragm Highly durable neoprene composite diaphragm offers precise adjustment of outlet pressure and extended service life. Warranty 3 YearsMiller's Gas Equipment and Gas Control Warranty Industries and Applications Aerospace Construction Heavy Equipment Manufacturing Infrastructure Manufacturing Railcar Shipbuilding Boat / Yacht High Purity Processing Specifications Click the image below to view full spec sheet