API Plan 53A

curve-down

Description

Pressurised barrier fluid circulation in outboard seal of dual seal configuration through a seal support system. Circulation is maintained by using pumping ring in running condition and with thermosyphon effect in stand still condition.

Features

1. In no case will media leak to atmosphere (Provided the seal support system pressure is not lost).

2. Clean fluid film formation between the inboard seal faces gives better seal life.

3. Works as a Plan 52 arrangement if barrier fluid pressure is lost.

Use

1. Applications where no leakage to atmosphere can be tolerated e.g. hazardous, toxic, inflammable media.

2. For dirty, abrasive or polymerizing products where media is unsuitable as a lubricant for inboard seal faces.

Caution

1. There will always be some leakage of barrier fluid into the product. Check compatibility of barrier fluid with product.

2. Always ensure that the pressure source maintains higher pressure at the seal support system so that process does not dilute the barrier fluid.

3. Vent the system properly before start up.

4. In certain cases the inert gas can dissolve in the barrier media.

5. Product quality can deteriorate due to barrier fluid contamination.

 
  • Read Our Water Savings Industry Guide

    This paper explains the problems associated with packing, how double mechanical seals with seal support systems solve these problems.

    Find Out More
  • API Piping Plan Booklet

    API Plans are standardized flushing piping arrangements that are widely used in industry. This downloadable pdf booklet describes both configurational parameters and application criteria

    Find Out More

Want an expert piping plan explanation?

Our API expert Richard Smith walks through some of the 4th Edition API Plans, providing expert analysis and explanation of each plan.

API video series thumbnail

Click to Watch

Did you know that you could see a return on investment whilst helping to save the environment?

Careful selection of configuration & product types can save your organisation and nature's valuable resources.

Take a Journey to 'Net Zero'