620-40000000 - Miller Smith 620 Series Silverline High Purity 2-Stage Regulator 1/4" FNPT

Precision Control for High Purity Applications

The Miller Smith 620 Series Silverline High Purity Brass Two Stage Regulator is engineered for applications where gas purity and pressure stability are paramount. Designed specifically for non-corrosive gases, this regulator features a robust nickel-plated brass bar stock body that provides excellent durability while maintaining a clean flow path. The core of its precision lies in the unique stainless steel diaphragm, which offers superior sensitivity compared to elastomeric alternatives and ensures that the gas stream remains uncontaminated by rubber or polymer off-gassing.

One of the critical challenges in specialty gas delivery is maintaining a constant outlet pressure as the supply cylinder drains. The 620 Series utilizes a two-stage reduction mechanism that effectively isolates the delivery pressure from fluctuations in the inlet pressure. This means that from a full 3500 PSI cylinder down to the last few pounds, your process receives a steady, unwavering flow. This feature is essential for analytical instrumentation, chromatography, and precise manufacturing processes where even minor pressure deviations can compromise results.

Safety and versatility are built into the design. The regulator includes capturable vent ports (1/16" FNPT) on the bonnet, allowing users to pipe vented gases away safely in the event of a diaphragm failure—a crucial feature when handling hazardous or asphyxiating gases. Additionally, the metal-to-metal seal between the body and diaphragm ensures a leak-tight integrity that can withstand internal vacuums, making this regulator suitable for purge cycles. With threaded bonnets for easy panel mounting and a filtered seat to protect against particulates, the Miller Smith 620 Series is the professional's choice for high-purity gas regulation.