A pressure regulator is a valve that controls the pressure of a fluid or gas to a desired value, using negative feedback from the controlled pressure. … A pressure reducing regulator is a control valve that reduces the input pressure of a fluid or gas to a desired value at its output. In this post, China’s reliable Air Compressors supplier, as one of the fast-growing “Direct Online Distribution networks” for reputable air compressors such as Ingersoll Rand (Doosan, CompAir, GD), Atlas Copco, Sullair, and all the genuine spare parts of these compressors. The company has been instructed to maintain, and operate such equipment in accordance with best practices and specific recommendation