Patent ID: 8740179
Filing Date: 2014-06-03
Classification: F16K

Abstract:
1. A fluid regulator, comprising: a regulator body; a first seat ring defining an orifice, the first seat ring to be disposed within the regular body, the first seat ring to provide a first fluid flow characteristic, the first seat ring being interchangeable with a second seat ring, the second seat ring to provide a second fluid flow characteristic, the first seat ring having first, second, and third annular surfaces spaced along a longitudinal axis of the regulator body that extends through the orifice, the second annular surface being between the first and third annular surfaces, a first circumferential wall being between the first and second annular surfaces, a second circumferential wall being between the second and third annular surfaces, the third annular surface to be sealingly engaged by a valve plug; and a first cage to provide a third fluid flow characteristic, the first cage being interchangeable with a second cage, the second cage to provide a fourth fluid characteristic, the first cage having an end and an inner wall, the end to engage the first annular surface and the inner wall is engage the first circumferential wall, the second annular surface defining a gap between the first and third annular surfaces to enable interchangeability of the first cage with the second cage.