The Welding Superstore Our eBay Store About Us Contact Us Add to Favorite Sellers Please note the shipping delivery estimate before placing your order! Miller Smith Part # 121-0003 • General purpose regulator for Inert and non-corrosive gases (Air, Nitrogen, CO2, Argon) • Filtered seat for added gas stream purity and extended service life • Large 1 – 7/8″ diaphragm for precise control of pressure • Rugged brass construction with bar stock body • Plated body, bonnet, and gauges for superior protection General purpose two stage regulators are recommended for control of inert and noncorrosive pure gases in laboratories, general plant and maintenance shops where constant delivery pressures are required. These regulators are not recommended for applications where inboard diffusion of air or outgassing of elastomeric components would adversely affect the work being done. A preset safety relief valve vents to atmosphere, which makes this regulator suitable for only nonhazardous gases. Filtered seat for added gas stream purity and extended service life. Large 1 – 7/8″ diaphragm for precise control of pressure and large 2 – 1/2″ easy to read single scale gauges. Rugged brass construction with bar stock body. Plated body, bonnet, and gauges for superior protection. Body is tapped for rear panel mounting. Sure-Seat technology for maximum life and gas purity. Series: 120 Silverline Division: Gas: Inert, Air, Nitrogen, CO2, Argon Delivery Range:  0-60 Max Inlet Pressure: 3500 CGA Fitting: CGA 326