Airgas Model N140FHF Brass Specialty High Purity High Flow Pressure Regulator With 1/2" FNPT Connection Single Stage They feature a brass piston

They feature a brass piston sensor in the first stage

galvanized steel with a powder-coat paint finish

Convoluted stainless steel diaphragms with metal-to-metal seals provide excellent regulating characteristics and allow for internal vacuum purging

This analytical series of high-purity brass single-stage regulators is recommended for non-corrosive analytical and process applications where precise pressure control is not required

These regulators have aunique design to reduce weight and make the regulatormore durable

Airgas Model N140FHF Brass Specialty High Purity High Flow Pressure Regulator With 1/2" FNPT Connection Single Stage They feature a brass pistonThis series of regulators is used for applications requiring high gas flow rates and a compact design. These regulators can handle flows up to 250 liters per minute of nitrogen with only a 5 psig pressure drop. In addition, these units will handle hydrogen flow up to 1,000 liters per minute without the resonance problems associated with other regulators in this same application.