311-00250000 - Miller Smith Silverline 310 Series High Purity Stainless Steel Regulator, 50 PSIG, CGA 660

Miller Smith Silverline High Purity Stainless Steel Regulator

The Miller Smith 311-00-25-00-00 Silverline Regulator is a premium-grade, single-stage pressure controller designed specifically for high-purity, corrosive, non-corrosive, and toxic gas applications. Engineered as part of the renowned 310 Silverline Series, this regulator is built to meet the rigorous demands of laboratory, industrial, and specialty gas environments where contamination control and material integrity are paramount. The unit features a robust body machined from 316 stainless steel bar stock, ensuring exceptional resistance to chemical attack and environmental corrosion.

At the heart of this regulator is a specially designed, convoluted 316 stainless steel diaphragm. This advanced diaphragm geometry provides maximum sensitivity and accuracy, allowing for stable regulation of delivery pressure even as cylinder pressure decays. The metal-to-metal seal between the diaphragm and the body eliminates the need for elastomeric seals in the gas stream, thereby maximizing leak integrity and preventing outgassing that could contaminate high-purity systems. Furthermore, the seat is constructed from 316 PCTFE and includes a filter to protect against particulate damage, ensuring a long service life and consistent performance.

Safety is a critical component of the Miller Smith 311-00-25-00-00 design. The bonnet includes a captured vent port (1/16 inch FNPT), which allows operators to pipe vented gases away to a safe location—a crucial feature when handling hazardous or toxic media. The regulator is also capable of withstanding an internal vacuum, making it suitable for purge cycles essential in maintaining system purity. With large, easy-to-read 2-1/2 inch single scale gauges and versatile mounting options (threaded bonnet for front panel, tapped body for rear panel), this regulator offers both precision and adaptability for complex gas delivery systems.

Key Features:

• Material Excellence: Full 316 Stainless Steel construction for wetted parts ensures compatibility with corrosive gases.


• Precision Control: Convoluted stainless diaphragm offers superior pressure stability and response.


• High Purity Design: Metal-to-metal seals and filtered PCTFE seats prevent contamination.


• Enhanced Safety: Captured vent port allows for the safe diversion of hazardous gas venting.