Wall provides the answer
Free 18-in. X 27 1/2 -in. wall chart includes industrial regulators on one side and natural gas regulators on the other, with photos of the products. Smaller wall charts — 8 1/4 in. X 12 1/2 in. — feature each of the two products, with selection guides on the back. The guides include reduced pressure ranges, relief set points, end connection sizes, and maximum inlet pressures.