Airgas Model C444B350 Supelcoat™ Coated Stainless Steel High Purity/Corrosive Service Cyclone Technology Single Stage Pressure Regulator With 1/4" FNPT Connection Switchover They feature an oversized “pancake”

They feature an oversized “pancake” body of magnesium alloy with a Buna-N diaphragm

Material: PVC

A sintered brass filter protects internal parts

which often can be a source of contamination

Airgas Model C444B350 Supelcoat™ Coated Stainless Steel High Purity/Corrosive Service Cyclone Technology Single Stage Pressure Regulator With 1/4" FNPT Connection Switchover They feature an oversized “pancake”Airgas unique line of Cyclone Technology pressure regulators are designed to preserve the specific gas mixture. These have a unique internal design to ensure all surfaces are continually swept, thus not allowing any dropout regardless of differences in specific weight of the various compounds within the mixture. These regulators also have a proprietary Supelcoat coating that prevent interaction of corrosive and volatile compounds in high purity gas