Manifolded sampling valve assembly

An improved manifolded sampling valve assembly for sampling fluid and including:

• a valve block having two inlet passages and first and second intermediate flow passages;
• a pair of flow control valves, each valve selectively placing a separate inlet passage in flow communication with a separate intermediate flow passage;
• and wherein:
• flowing fluid is in the first intermediate flow passage;
• and
• fluid flows bi-directionally away from the first intermediate flow passage.

In a valve assembly for controlling flow of fluid and having a valve block with (a) at least two inlet passages, and (b) an outlet passage and wherein the assembly has a separate flow control valve for connecting each inlet passage to the outlet passage, the improvement wherein:

• each valve has a primary valving surface;
• each of the two inlet passages is selectively placed in flow communication with the outlet passage by positioning a said primary valving surface;
• the assembly includes a drain passage for each inlet passage;
• each of the primary valving surfaces abuts a separate valve face when the valve is closed;
• each inlet passage contains pressurized fluid;
• and
• the pressurized fluid urges the valving surface toward the valve face when the valve is closed.