312-66210000 - Miller Smith 310 Silverline Stainless Steel Regulator, 1-Stage, 0-100 PSIG, CGA 326

High Purity Control for Corrosive Environments

The Miller Smith 312-66-21-00-00 is a premium component of the 310 Silverline Series, engineered specifically for the rigorous demands of high purity, corrosive, non-corrosive, and toxic gas regulation. This single-stage regulator is precision-machined from 316 stainless steel bar stock, ensuring that all wetted parts resist chemical attack and maintain the integrity of the gas stream. It is an essential instrument for laboratory, pharmaceutical, and industrial applications where contamination control is paramount.

At the core of this regulator is a specially designed convoluted stainless steel diaphragm. Unlike elastomeric diaphragms that can degrade or outgas, this metal-to-metal seal provides a leak-tight barrier that preserves system purity while offering exceptional sensitivity to pressure changes. The diaphragm's convoluted shape allows for a consistent response, delivering a stable output pressure of 0-100 PSIG even as cylinder pressure decays. The unit is rated for a maximum inlet pressure of 3500 PSIG, making it compatible with a wide range of high-pressure cylinders.

Safety and durability are built into every aspect of the design. The regulator features a captured vent port (1/16" FNPT) located in the bonnet, allowing operators to pipe hazardous gases away safely in the unlikely event of a diaphragm failure. The seat assembly utilizes 316 stainless steel with a PCTFE insert, a material chosen for its mechanical strength and resistance to cold flow and chemical degradation. This filtered seat design prevents particulate damage, extending the service life of the regulator. The unit comes equipped with a CGA 326 inlet connection and a 1/4" MNPT needle valve outlet for precise flow control.

Key Technical Specifications:

• Body Material: 316 Stainless Steel Bar Stock
• Diaphragm: Convoluted 316 Stainless Steel
• Seat Material: PCTFE
• Inlet Connection: CGA 326
• Outlet Connection: 1/4" MNPT Needle Valve
• Delivery Pressure: 0-100 PSIG
• Gauges: 2-1/2" Single Scale