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School > Seals > Flashcards

Seals Flashcards

1
Q

With pressure sealing, gaskets are usually subject to what?

A

Compression and Internal Pressure

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2
Q

What two types of O-rings are there?

A

Dynamic and Static

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3
Q

What are two main catagories of Dynamic Seals? Give examples for each.

A
  • Contact: Packing, Lip, Diaphram, Mechanical Seals
  • Clearance: Bushings, Annulus, Slinger, Labyrinth Seals
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4
Q

Are Dynamic Seals Positive or Non-Positive?

A

Can be either.

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5
Q

Is Packing Positive or Non-Positive Sealing?

A

Either

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6
Q

What is Inside and Outside Packed?

A
  • Inside is packing installed in the moving unit.
  • Outside is packing installed in the stationary unit. Ex..Stuffing box
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7
Q

What is Automatic Packing?

Name some examples.

A
  • Sealing which uses system pressure to improve its sealing action.
  • U-ring, V-ring, O-ring, Cup packing
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8
Q

Is Cup Packing Balanced or Unbalanced?

A

Unbalanced as it has one lip and seals only one diameter

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9
Q

A balanced seal is what?

A

A seal the seals on two diameters.

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10
Q

A Cup packing is usually found as a what?

A

Piston Seal

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11
Q

What is the purpose of a rod wiper?

A

Wipe off contaminants during the retract stroke.

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12
Q

A Lip Seal will only withstand a maximum pressure of about what?

A

5 PSIG

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13
Q

The width of standard O-ring grooves are usually machined out to what % of O-ring cross sectional diameter.

A

40% greater than the O-ring cross sectional diameter.

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14
Q

What type of Gasket is this?

A

Flat

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15
Q

What type of Gasket is this?

A

V - U-Shaped

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16
Q

What type of Gasket is this?

A

Spiral-wound

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17
Q

What type of Gasket is this?

A

Corrugated or Embossed

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18
Q

What type of Gasket is this?

A

Jacketed with filler material core

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19
Q

What type of Gasket is this?

A

Flexi-metallic has a metallic inner ring and non-metallic outer ring.

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20
Q

What is 1 miro-inch in microns?

A

1 micro-inch = 0.0254 microns

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21
Q

What is this?

Label it.

A

Lip Seal

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22
Q

What type of seal is this?

A

Lip Seal, Inclusion Position

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23
Q

What type of seal is this?

A

Lip Seal, Exclusion Position

24
Q

What type of seal is this?

A

Double Lip Seal

25
Q

What is this?

A

Annulus Seal, Concentric Grooves

26
Q

What is this?

A

Annulus Seal, Helical Gooves

27
Q

What is this?

A

Slinger Seal

28
Q

What is this?

A

Labyrinth Seal

29
Q

What is this?

A

Flat Diaphragm Seal

30
Q

What is this?

A

Rolling Diaphragm Seal

31
Q

What is this?

Label it.

A

Mechanical Seal

32
Q

What is this?

A

Annulus Seal, Concentric

33
Q

What is this?

A

Annulus Seal, Helical

34
Q

What is this?

A

Slinger Seal

35
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Answer.

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57
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School (46 decks)

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