isolation valve造句怎么写

The bypass line shall consist of a meter, a small diameter double check assembly with test cocks and isolation valves.

Wafer-style held in place between two pipe flanges. Easy to install but cannot be used as isolation valve.

A butterfly isolation valve cannot be installed directly to the valve inlet flange, as the disc will contact the orifice plate.

On the top of figure 2-1, the isolation valve separates the left and right halves of the system.