Corrosive Service Regulators (part 2 of 2)

This article covers some specific examples of regulators for corrosive service, but it is not the complete story. Contact MATHESON, or visit our website for more details.

Standard Corrosive Service. We offer the 3630A Series and the high-purity 3610A Series for corrosive gases like Ammonia, Hydrogen Sulfide, Nitric Oxide and Sulfur Dioxide. Models 3510A and 3810A can also be used for corrosive service.

High Purity Miniature Regulators. These regulators are recommended for use with corrosive gases where stainless steel systems are required, and the gases are in lecture bottles. The proven, low maintenance design features a Kel-F® seat and Teflon® seals for wide media compatibility. Model 3570 or 3870 Series is recommended.

Deluxe Monel® Corrosive Service. Designed for the pressure control of corrosive halogen gases, the deluxe corrosive service regulators Model 3210A Series have all-wetted parts of either PCTFE®, or Monel® materials.

Fluorine Corrosive Service. Specifically designed for use in pure fluorine gas service the Model 3225A is recommended. This is a Monel® construction with bronze filled Teflon® seat and Kel-F® seals. The Model 3610A is recommended when mixtures 10% or below of fluorine gas are being used. Cross-Purge strongly recommended.

Specialty Line Regulators. We offer Model 3450A Series high flow line regulator for use with dichlorosilane, ammonia and amines. And the Model 3494 for absolute pressure delivery applications. Cross-Purge strongly recommended.

Cross-Purge Assemblies. Cross-purge assemblies Model 4774 and 4775 provide effective purging during cylinder change out. Hazardous gas traces are eliminated before opening the cylinder connection, and atmospheric gases are removed after reconnection.

The quarter-turn diaphragm valves allow easy, fast purge cycles, while the color-coded lever handles indicate gas flow and mode of operation. These assemblies are also designed to prolong the service life of regulators and other gas system components.

Each cross-purge assembly incorporates the use of an integrated check valve to prevent backflow of process gas into the purge line.

We'll cover more about cross-purge assemblies in a future article.