Patent ID: 8997785
Filing Date: 2015-04-07
Classification: F16K,Y10T

Abstract:
1. A valve assembly including at least one passage along which fluid can be selectively allowed to pass, said assembly including a valve body in which the passage is formed and at least first and second balls located in the passage, each selectively movable between a first position in which a channel in the ball forms part of the passage and a second position in which the ball prevents fluid passing along the passage and wherein a sealing assembly is provided in a space in the valve body between said balls, said sealing assembly including a sealing ring for location with a face of a first ball and a sealing ring for location with a face of the other of said balls and wherein biasing means are provided with a first end of each of the biasing means located to act on the first sealing ring and a second end located to act on the second sealing ring, wherein at least a portion of the biasing means intermediate the ends of the same are located in a channel for each respective biasing means and said channels are located between the first and second sealing rings.