Butterfly Valve Installation Instructions

butterfly valve
A valve consisting of a pair of semicircular plates that are attached to a spindle across a pipe and hinged to allow flow only one way
A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off.
A valve consisting of a disk rotating on an axis across the diameter of a pipe to regulate the flow, as in the throttles of many engines
a valve in a carburetor that consists of a disc that turns and acts as a throttle
(Butterfly Valves) A valve consisting of a cylindrical body with a rotating vane to control flow. Tight Shutoff is obtained by an elastomer body liner into which the vane seats.

installation
The action or process of installing someone or something, or of being installed
A large piece of equipment installed for use
initiation: a formal entry into an organization or position or office; "his initiation into the club"; "he was ordered to report for induction into the army"; "he gave a speech as part of his installation into the hall of fame"
A thing installed, in particular
facility: a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility"
the act of installing something (as equipment); "the telephone installation took only a few minutes"

instructions
A code or sequence in a computer program that defines an operation and puts it into effect
(instruction) education: the activities of educating or instructing; activities that impart knowledge or skill; "he received no formal education"; "our instruction was carefully programmed"; "good classroom teaching is seldom rewarded"
A direction or order
(instruction) direction: a message describing how something is to be done; "he gave directions faster than she could follow them"
Directions to a lawyer or to a jury
instruction manual: a manual usually accompanying a technical device and explaining how to install or operate it