2.5 Valves

Question 0

What valve is used primarily to stop, start, and throttle fuel?

Answer 0

Globe Valve

Question 1

What valve is never to be used in throttling flow?

Answer 1

Gate Valve

Question 2

What component of the Gate Valve provides leverage to open/close the valve and is held in place by the yoke sleeve nut?

Answer 2

Hand wheel

Question 3

What component of the Gate Valve turns with the hand wheel, causing the stem to move up or down?

Answer 3

Yoke Sleeve

• also has internal threads, which mate with the steam threads.

Question 4

The _____________ is a metal collar that fits around the stem and applies pressure to the packing to prevent leakage along the stem.

Answer 4

Packing Gland

Question 5

What provides a passage for fluid flow?

Answer 5

Body

Question 6

What moves up or down when the hand wheel is turned?

Answer 6

Stem

Question 7

What consists of short lengths of flexible material fitted around the stem and compressed into the stuffing box?

Answer 7

Packing

Question 8

In the Gate Valve what is used to keep the gate aligned with the seats?

Answer 8

Guide Ribs

Question 9

What valve allows the flow in one direction only?

Answer 9

One-way check valve

Question 10

In the Gate Valve what is used to keep the gate aligned with the seats?

Answer 10

Guide Ribs

Question 11

What is connected to the valve body and is used to support the stuffing box?

Answer 11

Bonnett

Question 12

Turning the handle of the butterfly valve ____ degrees to the valve body will cause the disk to seat, closing the valve.

Answer 12

90

Question 13

On the Globe Valve the _______ works with the seat to control fluid flow and is connected to the stem by the disk stem ring.

Answer 13

disk

Question 14

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.

Answer 14

seats

Question 15

On the Gate Valve the _________ is attached to the stem and raised or lowered to open or close the valve.

Answer 15

gate

Question 16

On the Globe Valve the __________ is cast into the valve body to direct flow through the valve, and to support the seat.

Answer 16

bridge wall

Question 17

On the Globe Valve the __________ (metal ring) has a machined surface which mates with the disk.

Answer 17

body seat

Question 18

On the ______________ opens on fluid flow; closes on reverse or no fluid flow.

Answer 18

One-way Check Valve (swing type)

Question 19

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.

Answer 19

angle plug

Question 20

On the Butterfly Valve the _________________ protects the seat from abrasion and erosion.

Answer 20

body insert