A sample valve of each size shall be cycled 50,000 times, at a rate not exceeding 6 cycles per minute,
through its full range of travel in a static air environment. This test shall be conducted at atmospheric
(0 psi, 0 kPa) conditions. After the completion of the cycling test, the valve shall be disassembled. Parts
shall be visibly examined for signs of excessive wear, damage or failure. This test, or a portion thereof,
may be waived at the option of the examining engineer if a design and calculation review are satisfactory