Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


plan 53b and 53c difference?

plan 53b and 53c difference?

plan 53b and 53c difference?

dear all,

I'd like to ask you what's the difference between plan 53b and plan 53c, we know that plan 53b has bladder accumulator, what's the function of bladder accumulator?and why use bladder accumulator?
thank you

RE: plan 53b and 53c difference?

Not really sure what information you are looking for.
Like you said the 53b uses a bladder accumulator. The barrier is pressurized using a gas, and this bladder isolates the gas from barrier fluid (unlike a 53a).
The 53c uses a piston accumulator to pressurize the barrier fluid.

Generally you use the bladder if you are pressurising barrier above 10 bar. I believe the 53c piston system is better but costs more

RE: plan 53b and 53c difference?

above certain pressure N2 will dissolve in barrier liquid and might cause foaming, therefore separation of barrier gas and barrier liquid by means of bladder/piston

RE: plan 53b and 53c difference?

Another complication with a bladderless accumulator is the need to install a level guage and level switch to alert the plant operator to top up, while a bladder type accumulator only needs a pressure guage / pressure switch, which is arguably less prone to failure than a level switch. A bladder type accumulator amy also save you on pressurisation gas for the plan 53b alternate.

RE: plan 53b and 53c difference?

[left][i][right]Plan 53C is the most complex, and least standardized of
the three. It is sometimes called a pressure boosting or pressure
intensifying system. It contains moving parts that regulate the
barrier pressure as a function of the pump’s product pressure.
The moving part is a sealed piston pressurized with the pumped
medium. On the other side of the piston, the barrier fl uid is pressurized in a hydraulic cylinder to a pressure that is higher
than the reference or pump pressure. The difference is driven
by the piston ratio in the cylinder. The typical input/output
pressure ratio is 1:1.1 or about a 10 percent increase or boost.
These systems can have an internal cooling coil or an external
cooler in the loop as in Plan 53B. With an internal coil,
their cooling capacity is typically limited to 4 kW. The makeup
volume is typically limited to approximately 1 gallon with a
maximum operating pressure of roughly 1,000 psig. Plan 53C
is typically used in applications where the pressure differential
across the inner seal must be maintained within a narrow range.
Use is limited to clean pumping fl uids since fi ne abrasives may
cause the piston seal to malfunction and the system to fail due
to lost pressure differential. Any leakage of pumped fl uid is
contained within the system.
The greatest benefi t of this system is that no external
energy is required to pressurize the barrier fl uid. Plan 53C systems
require periodic maintenance and, in general, are not as
reliable as Plans 53A or B.

A well phrased question has answers in itself!!!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close