They rotate at half engine speed and lack the inertia forces of reciprocating valve mechanisms.

Finally, consider the valve mechanism inside the faucet, because it can affect the price and reliability of the fixture.

Most modern demand valves use a downstream rather than an upstream valve mechanism.

These spheres were connected to a single manifold that connected to a valve mechanism.

He got down, and began to dismantle the valve mechanism on the cylinder.

Functionally, the second piston replaces the valve mechanism of a conventional engine.

The trip point of the valve mechanism, and therefore the cut-off, would be adjusted either manually or automatically by the governor.

This could be due to dirt in the valve body or just a bad valve mechanism.

If it does not, then chances are that the ballcock assembly (the inlet valve mechanism) needs to be replaced.