The B838 is designed for large commercial and industrial applications where the added safety of twin sliding orifices and/or dual relief is desirable. The increased capacity inherent in parallel flow regulators enables the B838 to handle large loads even at delivery pressures of 2 and 5 PSIG. The 838 can thus address fixed factor needs while retaining all of the favorable characteristics of spring loaded regulators such as quick response, low lockup, and internal relief. Typical applications include hospitals, apartment buildings, hotels, high-rises, and public buildings.