Stimuli are signals that trigger the senses. Receptors detect the stimuli and neurons send the signals to the brain where they're interpreted. Each sense organ includes receptors that capture relevant stimuli for transmission to the brain. The receptors in the skin are mechanoreceptors and thermoreceptors.
AWWA Butterfly valves are quick opening valves that consist of a metal circular disc or vane with its pivot axes at right angles to the direction of flow in the pipe, which when rotated on a shaft, seals against seats in the valve body. They are normally used as throttling valves to control flow.
Valve Manifolds can be used for simple functions such as controlling automatic doors or dispensing drinks. Valve Manifolds can also be used in more complex applications such as patient gas monitoring in a hospital operating theatre or the monitoring dangerous gases in the brewing and diving industries.