631-4110 - Miller Smith Silverline 630 Series Two-Stage Lecture Bottle Regulator CGA 590

Precision Control for Specialty Gases

The Miller Smith 631-41-10 Silverline High Purity Two Stage Lecture Bottle Regulator is engineered to meet the rigorous demands of laboratory and analytical applications. Designed specifically for lecture bottles where space is at a premium, this regulator does not sacrifice performance for size. As part of the renowned Silverline 630 Series, it provides a reliable solution for controlling non-corrosive specialty gases with exceptional precision.

Two-Stage Regulation Technology

One of the critical challenges in using small cylinders, such as lecture bottles, is the rapid decay of inlet pressure as the gas is consumed. A standard single-stage regulator would allow the delivery pressure to rise as the cylinder pressure falls, requiring constant manual adjustment. The 631-41-10 utilizes a true two-stage design: the first stage (brass piston) steps down the high inlet pressure to an intermediate level, while the second stage (stainless steel diaphragm) regulates it to the final delivery pressure. This configuration ensures that your output remains stable at the set 10 PSI (adjustable 0-15 PSI) throughout the life of the cylinder, providing consistent flow for sensitive instrumentation.

High Purity Construction

Contamination is the enemy of analytical accuracy. This regulator features a 1-inch 316 stainless steel diaphragm in the second stage. Unlike rubber or neoprene diaphragms, stainless steel prevents off-gassing and absorption, maintaining the purity of the gas stream. The body is machined from rugged brass bar stock and finished with chrome plating on the body, bonnet, and gauges. This not only provides a professional aesthetic suitable for lab environments but also offers superior protection against external corrosion and wear. Internal sintered brass filters further protect the seating mechanism from particulate damage, extending the service life of the unit.

Safety and Specifications

Safety is paramount when handling high-pressure gases. The Miller Smith 631-41-10 includes a built-in capturable preset safety relief valve, which vents excess pressure safely away from the diaphragm in the event of a failure. The unit is rated for a maximum inlet pressure of 3500 PSI and connects via a CGA 590 fitting, commonly used for industrial air and specific inert gas mixtures. The large adjusting knob allows for fine-tuning of pressure, while the 1-1/2" chrome-plated gauges provide clear, easy-to-read monitoring of both cylinder and delivery pressures.