221-4010 - Miller Smith Silverline 220 Series High Purity Two-Stage Regulator, CGA 590, 0-60 PSI

Miller Smith Silverline Series: The Standard for Purity

Welders Supply is proud to offer the Miller Smith 221-40-10, a premium two-stage regulator from the renowned Silverline 220 Series. Designed for high-purity applications, this regulator is the ideal choice for professionals requiring precise gas control for non-corrosive pure gases and mixtures. Whether you are setting up a calibration station or managing carrier gases for analytical instruments, the 221-40-10 provides the reliability and accuracy associated with the Miller Smith name. The unit features a CGA 590 inlet connection and delivers a precise output range of 0-60 PSIG, making it versatile for various low-pressure applications.

Advanced Two-Stage Technology

For applications where steady pressure is non-negotiable, a single-stage regulator often falls short due to the "decay" effect—where delivery pressure rises as the cylinder pressure falls. The Miller Smith 221-40-10 solves this with its two-stage architecture. The first stage reduces the high cylinder pressure (up to 3500 PSIG) to an intermediate level, allowing the second stage to deliver a rock-steady output pressure to your equipment. This ensures that from a full cylinder down to a nearly empty one, your flow rates and pressure settings remain consistent without constant manual adjustment.

Built for Durability and Safety

The construction of the 221-40-10 reflects Miller's commitment to quality. The regulator features a stainless steel diaphragm, which is superior to rubber or neoprene alternatives for high-purity applications as it does not off-gas or absorb contaminants. The seat is filtered to prevent debris from entering the high-velocity gas stream, significantly extending the service life of the regulator. Externally, the brass bar stock body, bonnet, and gauges are fully plated, offering a durable finish that resists tarnishing and corrosion. Additionally, the regulator includes an automatic reseating safety relief valve to protect against over-pressurization, ensuring operator safety in the shop or laboratory.

• High Purity Design: Stainless steel diaphragm and filtered seat for analytical grade performance.
• Two-Stage Precision: Constant delivery pressure throughout the life of the cylinder.
• Robust Build: Plated brass bar stock construction for industrial durability.
• Clear Readout: Large 2.5-inch gauges for easy monitoring.