2.5 Valves Flashcards
What valve is used primarily to stop, start, and throttle fuel?
Globe Valve
What valve is never to be used in throttling flow?
Gate Valve
What component of the Gate Valve provides leverage to open/close the valve and is held in place by the yoke sleeve nut?
Hand wheel
What component of the Gate Valve turns with the hand wheel, causing the stem to move up or down?
Yoke Sleeve
- also has internal threads, which mate with the steam threads.
The _____________ is a metal collar that fits around the stem and applies pressure to the packing to prevent leakage along the stem.
Packing Gland
What provides a passage for fluid flow?
Body
What moves up or down when the hand wheel is turned?
Stem
What consists of short lengths of flexible material fitted around the stem and compressed into the stuffing box?
Packing
In the Gate Valve what is used to keep the gate aligned with the seats?
Guide Ribs
What valve allows the flow in one direction only?
One-way check valve
In the Gate Valve what is used to keep the gate aligned with the seats?
Guide Ribs
What is connected to the valve body and is used to support the stuffing box?
Bonnett
Turning the handle of the butterfly valve ____ degrees to the valve body will cause the disk to seat, closing the valve.
90
On the Globe Valve the _______ works with the seat to control fluid flow and is connected to the stem by the disk stem ring.
disk
On the Gate Valve the ________ are cast, machined, or threaded into the valve body to form a metal-to-metal fluid tight seal when the gate is sealed.
seats
On the Gate Valve the _________ is attached to the stem and raised or lowered to open or close the valve.
gate
On the Globe Valve the __________ is cast into the valve body to direct flow through the valve, and to support the seat.
bridge wall
On the Globe Valve the __________ (metal ring) has a machined surface which mates with the disk.
body seat
On the ______________ opens on fluid flow; closes on reverse or no fluid flow.
One-way Check Valve (swing type)
The ______________ screws into the valve body of the One-way Check Valve and provides a stop for the arm to prevent the disc from jamming in the open position.
angle plug
On the Butterfly Valve the _________________ protects the seat from abrasion and erosion.
body insert
