scope:

This standard covers cast-iron and ductile-iron body, rubber-seated, tight-closure butterfly valves, 3-72 in. in size, with various body types and body ends for maximum shutoff pressures and operating torques, as indicated in Table 1, and for fresh water having a pH greater than 6 and temperatures generally less than 125°F (52°C). Valves covered by this standard are furnished in four body types and in classes (as listed in Table 1) as follows:

Wafer valves. Class 15013, in sizes through 20 in.

Short-body flanged valves. All classes, in sizes 3-72 in.

Long-body valves. Class 75A, 7513, 150A, and 15013, in sizes 3-72 in.

Mechanical-joint-end valves. Class 15013, in sizes 3-24 in., and all classes in sizes 30-48 in.