Airgas Model E444B590 Stainless Steel High Purity Two Stage Positive Seal Regulator With 1/4" FNPT Connection High Flow Pressure The check valve cylinder connection

The check valve cylinder connection prevents air and contaminants from entering the gas stream during cylinder change out

The optional bonnet vent adapter allows venting of hazardous gases in the event of diaphragm failure

thus not allowing any dropout regardless of differences in specific weight of the various compounds within the mixture

Heavy duty zipper on Aramid tape

These unique patented general-purpose two-stage regulators are recommended for analyticalnon-corrosive

Airgas Model E444B590 Stainless Steel High Purity Two Stage Positive Seal Regulator With 1/4" FNPT Connection High Flow Pressure The check valve cylinder connectionThese two stage positive seal regulators feature convoluted, Hastelloy C 22 diaphragms that provide maximum sensitivity, minimum droop and a leak tight bonnet seal. Type 316 stainless steel internal components are ultra sonically cleaned and electropolished to a 32 Ra surface finish for applications where a contamination free flow stream is critical. Optional 15 Ra electropolished with faceseal. A rugged, mechanical linkage connecting the diaphragm