Ultra-miniature, single-stage diaphragm pressure regulators by Beswick Engineering Co, Inc, Greenland, NH, are designed for high flows. PRDHF is a 10-32 ported, non-relieving version and PRDHF8 is a manifold-mount version. PRDHF comes in brass, stainless steel, and aluminum. It controls output pressures from 0 to 30 psig and is suited to pressure regulation as low as ½ psig. PRDH8 is similar, but is only available in brass and stainless steel. The inlet is a 5/16-24 UNF external thread and the outlet port is through a 0.094-in. diameter hole at the base, which eliminates fitting and tubing connections.