721C125580E - Harris HP721C High Purity Regulator - CGA 580, 0-125 PSI, 1/4" Tube

Reliable Specialty Gas Control

When your shop or facility moves beyond standard industrial welding and into the realm of specialty gases and precision work, the Harris HP721C Regulator is the tool you need. While built to laboratory standards, this regulator carries the legendary durability that Harris is known for in the welding industry. It is designed for CGA 580 cylinders—commonly used for Argon, Nitrogen, and Helium—and provides a steady, reliable delivery pressure of 0-125 PSI.

The standout feature for technicians and fabricators is the stainless steel diaphragm. In standard regulators, rubber diaphragms can wear out or absorb impurities over time. The metal diaphragm in the HP721C ensures that your gas flow remains pure and your pressure settings stay locked in, day after day. The body is machined from solid brass and chrome-plated, offering superior resistance to wear and corrosion compared to standard forged bodies. It looks professional and performs even better.

This model comes ready to plumb into your custom setups with a 1/4" tube fitting outlet, perfect for hard-piping into machines, purge kits, or testing rigs. The large, easy-to-read 2-inch gauges allow you to monitor tank levels and delivery pressure at a glance. Whether you are setting up a laser cutting station, a specialized TIG purging system, or simply need a high-quality regulator for nitrogen pressure testing, the HP721C delivers the accuracy you need with the toughness you expect. Backed by Harris's 7-year warranty, it is an investment in quality that pays off in consistent performance.

Key Features for the Pro

• Solid Construction: Chrome-plated brass barstock body handles the rigors of daily use.
• High Precision: Metal diaphragm ensures consistent pressure without fluctuation.
• Versatile Connection: 1/4" tube fitting adapts easily to various hoses and lines.
• Safety First: Built-in external relief valve protects your equipment.
• Industry Standard: Fits all standard CGA 580 inert gas cylinders.