Lubrication system standby pump and vapor extractor

[M.Saad]

Can any one tell me why the lubrication stand by pump must be of motor driven type instead of shaft driven using the lubricated system output power

Consider that I answered that it is used

another question is what can lubrication oil vapor do as a negative effect in the oil tank beside fire hazard. (in another way why do we use oil vapor extractor in lub oil tanks)

 

[Artisi]

1.Are you saying that the standby lubrication pump is a complete seperate unit - a pump and motor together?
2. Are you asking why the standby lubrication pump can not be driven by the main system?
3. How is the No1 lubrication pump driven?

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[JJPellin]

I prefer to avoid a shaft driven lube oil pump whenever possible. There are a number of reasons for this:

1. The auto-start feature cannot be fully tested.
2. There are limited possibilities to troubleshoot any oil pressure concerns.
3. This usually places the oil pump above the tank level which requires a foot valve and creates a possible loss of prime.
4. The little drive couplings are typically low-tech and prone to failure without warning.

Johnny Pellin

 

[JJPellin]

Oil vapor coming from an oil reservoir creates a mess, a potential fire hazard and a potential safety hazard from slip and fall. A vapor extractor can solve these problems

Johnny Pellin