3000616 - Harris 25GX-250-580 Single-Stage Nitrogen Purging Regulator CGA 580

Technical Overview of the Harris Model 25GX-250-580

The Harris Model 25GX-250-580 is a single-stage pressure regulator engineered specifically for medium to heavy-duty applications involving inert gases, primarily nitrogen. This unit is a staple in the HVAC industry, designed to facilitate precise nitrogen purging, pressure testing, and blanketing operations. The regulator is built around a forged brass body which provides substantial resistance to corrosion and mechanical stress, ensuring longevity in industrial environments. A key structural component is the chrome-plated zinc bonnet, which adds an extra layer of durability while maintaining a professional aesthetic.

At the core of the 25GX series' performance is its advanced seating mechanism. Harris utilizes a one-piece encapsulated seat design that integrates an internal filter. This configuration is critical for protecting the PTFE (Teflon®) seat from particulate contamination, which is a common cause of regulator failure. By preventing debris from embedding in the seat, the regulator maintains a positive seal and prevents creep, thereby extending the maintenance interval and overall service life of the device. The flow coefficient (Cv) of 0.17 ensures adequate flow rates for standard purging tasks without compromising pressure stability.

Pressure regulation is managed by a robust neoprene diaphragm. Unlike stainless steel diaphragms used in ultra-high purity applications, neoprene offers excellent sensitivity and resilience for general industrial gas control, allowing for smooth pressure adjustments via the brass T-screw handle. The regulator is calibrated for a delivery pressure range of 0-250 PSIG, making it versatile for various testing protocols. The unit is equipped with 2.5-inch steel dual-scale gauges, providing clear readings of both cylinder and delivery pressures. The inlet connection is a standard CGA 580, compatible with nitrogen, argon, and helium cylinders. This product is UL listed and meets CGA E-4 standards, reflecting its adherence to rigorous safety and performance criteria.