The standby header is provide a check valve shall be installed to prevent backflow.
<h3>What is instrument air?</h3>
The phrase “Instrument Air” is a term that connote a thoroughly clean supply of compressed air that is said to be very free from any kind of contaminations such as particles.
Note that a system often utilize instrument air for different kinds of pneumatic tools, also that of valves and electrical controls.
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Instrument Air system that employ a standby header shall be permitted to have a simplex cooler and dryer. Where a standby header is provided, a ___________ shall be installed to prevent backflow.
answer choices
one way valve
two way check valve
check valve
Isolation valve
Learn more about Instrument from
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Answer:
Voice refers to the form of a verb that indicates when a grammatical subject performs the action or is the receiver of the action. When a sentence is written in the active voice, the subject performs the action; in the passive voice, the subject receives the action.
Both can be the same thing
