Airgas Model C445B320 Supelcoat™ Coated Stainless Steel High Purity Two Stage Pressure Regulator With 1/4" FNPT Connection And Threadless Seat regulator and the threaded-seat design allows

and the threaded-seat design allows for internal vacuum purging

The metal-to-metal diaphragm seal prevents contamination by eliminating the need for a soft seal and provides a leak-rate design of less than 2 x 10–8ccs helium

Preset Safety Relief Valve - prevents excessive pressure buildup

two-stage analytical series and high-purity stainless steel regulators are ideally suited for lecture bottles and other small cylinders

These regulators have a unique design to reduce weight and make the regulator more durable

Airgas Model C445B320 Supelcoat™ Coated Stainless Steel High Purity Two Stage Pressure Regulator With 1/4" FNPT Connection And Threadless Seat regulator and the threaded-seat design allowsThis series of 316 stainless steel two stage high purity regulators is designed for non corrosive analytical, mildly corrosive and process applications requiring precise, stable delivery pressure control. The two stage design yields a delivery pressure change of less than 0. 01 100 psi inlet change. Convoluted Hastelloy C 22 diaphragms provide excellent regulating characteristics and allow for internal vacuum purging. The metal to metal diaphragm seal