An S200 Series regulator with an H or K (Figure 3) in the type number can deliver air or gas at a higher outlet pressure setting than the basic Type S201 (see Table 3). S200 Series regulators with an H or K in the type number have a heavy diaphragm plate, while most other S200 Series regulators have a light diaphragm plate. However, a regulator with a P in the type number will have a light diaphragm plate for outlet pressure ranges under 1 psig / 0.07 bar and a heavy diaphragm plate outlet pressure ranges over 1 psig / 0.07 bar.
