• USA - West Texas

    USA - West Texas

    For our client in West Texas we rapidly supplied API682 style Monel seals for hydrofluoric acid duties, rapidly helping restore the equipment to full functional performance.
  • Brazil


    Commissioned to undertake a large dual seal upgrade project for a customer in Brazil, we quickly configured and delivered 53A and 53B pressurised dual seal systems.
  • South Africa

    South Africa

    Asked to manage a reliability programme for a large population of seals, we delivered significant MTBR improvements at our customer's South African petrochemical facility.
  • UK – Aberdeen

    UK – Aberdeen

    For this offshore customer in Aberdeen, we designed, manufactured and delivered engineered high-pressure seals to replace obsolete OEM seals for its main oil line export pumps – all within 48 hours.
  • Middle East – Saudi Arabia

    Middle East – Saudi Arabia

    For this customer in Saudi Arabia, we managed seal repair and a reliability programme at a major petrochemical facility. As well as helping improve reliability, we also reduced the total cost of ownership.
  • Far East

    Far East

    We've won a significant contract in the Far East, giving us responsibility for bearing protection for a major global business in this territory.
  • Italy


    "We were delivered 2 incorrect seals for caustic soda applications that left us in a very uncomfortable situation. We contacted AESSEAL and they guaranteed 2 new seals within the fastest delivery time. AESSEAL are now involved in bids on all key projects in our plant."
  • South Africa

    South Africa

    "We receive 24hr support 365 days a year from AESSEAL. They not only solve our sealing problems through training and expert advice, they also use their extensive pump knowledge to provide significant savings in other areas. In short, they are servicing us to death."

API Plan 75

Leakage of condensate from inboard seal of a dual containment seal is directed to a liquid collector.

  1. Can be used with Plan 72 with buffer gas or with Plan 71 without buffer gas systems.
  2. Collection can be redirected to process fluid by using separate pumping device.
  3. Can be used in single containment seal also.
  4. Test connection is provided to check the inner seal by closing the block isolation valve while pump is in operation and noting the time / pressure build-up relationship in the collector.  
  1. Duties with condensing leakages.
  2. Hazardous, toxic fluids.
  3. May also be used for non-condensing leakages. In such cases, the collector can help in collecting condensate from the vapor recovery system.     
  1. Ensure that collection system is located below the seal drain with sloping pipelines.  
  2. Drain port should be at bottom of containment seal to allow the leakage to flow to the collection system  
  3. Collection system should always be vented releasing vapors of process liquid to vapor recovery system.  
  4. Valves that are installed should be accessible to operator relative to ground clearance and other obstructions.  
  5.  A flow control orifice is required to create back pressure on collection system and to have effective condensation of vapors.
  6. Pressure switch should be set at a gauge pressure of 0.7 bar.

Do you work with API qualified mechanical seals?


Our API Mechanical Seals Information Pack contains the best information we’ve been able to assemble. We are publishing and distributing this for free. Click here to download a copy.
Related Downloads
Product Literature
API Piping Plan Guide
Follow Us On:
AESSEAL on YouTube Follow AESSEAL on Twitter
Telephone Us
+44 (0)1709 369966