Marsh Bellofram's regulator can handle inlet pressures up to 400 psi.

Type P38 is suitable for applications requiring a consistent, stable flow of propane or natural gas such as grain drying, high BTU burners, and transmission applications requiring a pounds-to-pounds regulator. The unit from Marsh Belloframcan handle inlet pressures up to 400 psi and outlet pressure between 0 and 125 psi. Flow rates up to 220 scfm are obtained with the 0.5" inlet/outlet connections and 100 psi inlet pressure.