U2 Seal Oil

Question 1

What are the AC Air Oil Pump auto starts?

Answer 1

• Air Oil supply press < 4.0# higher than H2 press

- Low Dicharge # at 15#

Question 2

What are the U2 DC Air Oil Pump Seal auto starts?

Answer 2

Has a 5 Sec delay:

• Air Oil supply press < 4.0# higher than H2 press
• Low Dicharge # at 15#

Question 3

What are the U2 Vacuum Oil Pump trips for U2 Seal oil?

Answer 3

• Trip on Lo Vac Oil Tank Level after 10 sec delay

- Will restart once level is restored

Question 4

What are the U2 Vacuum Oil Vacuum Pump trips for U2 Seal oil?

Answer 4

• Trips on High Vacuum Oil Tank Level (10 sec delay) i Will restart when level recovers

Question 5

What are the U2 H2 Oil pump trips for U2 Seal oil?

Answer 5

• Trips on Lo suction level at (10 sec time delay)

- Restarts when level recovers

Question 6

At what # do we maintain Air Oil at?

Answer 6

• 7# > Machine Gas #

Question 7

If LRV-608 fails closed, what happens to Air Oil?

Answer 7

• LRV-610 maintains a constant Air Oil # at 75 #

Question 8

What maintains Level in the H2 Seal Oil System?

Answer 8

• LRV-606/607

Question 9

If you get a high level in the H2 seal oil system, what happens?

Answer 9

• LRV-603 opens to maintain level from getting backed up into generator

Question 10

If you lose H2 Seal oil system, what will maintain it and what happens?

Answer 10

• Vacuum Seal oil will supply it and losing H2 Seal oil will reduce H2 purity

Question 11

If you lose Vacuum Seal oil system, what will maintain it and what happens?

Answer 11

• Air Seal Oil will maintain both H2 and Vacuum Seal oil at Air Oil #

Question 12

If you lose Air Seal Oil system, what will maintain it and what happens?

Answer 12

• Nothing can maintain it, and you’ll have to trip

Question 13

At what temp does H2 Seal Oil try to Maintain?

Answer 13

• 110-130°F with an auto bypass around the cooler to maintain this temp

Question 14

At what pressure is Vacuum Seal Oil maintained?

Answer 14

• 6# > Air Oil (by SV-601/602)

Question 15

At what pressure is H2 Seal Oil maintained?

Answer 15

• It follows vacuum oil #

Question 16

On a diaphram failure, which way does LRV-608 fail?

Answer 16

• Fails Closed

Question 17

If the H2 sensing line fails (sensing line of machine gas pressure), how will LRV-608 react?

Answer 17

• Fails open filling up the Vac-Oil Tank (loss of Air-Oil)

Question 18

How does LRV-609 the Vacuum Oil Tank Lvl Cntrl Vlv react to a diaphram failure?

Answer 18

• Fails Open

Question 19

What happens if LRV-603, H2-Oil overflow valve) fails open?

Answer 19

• results in rapid release of H2 gas to H2 detraining siphon

Question 20

What happens if LRV-603, H2-Oil overflow valve) fails closed?

Answer 20

• result in oil backing

up into the Generator

Question 21

What happens on a loss of U2 H2 Seal Oil?

Answer 21

• Lowers purity and is then supplied by Vacuum Seal Oil

Question 22

What happens on a loss of U2 Vacuum Seal Oil?

Answer 22

• H2 Oil # will be maintained by Air-Oil (Follows what it sees on the Vacuum oil header which would be the Air Oil # that has moved over)