API 682 Seal Support Systems: Keeping Pump and Compressor Seals Running

At a glance. Pumps and compressors in hazardous service use double mechanical seals, and those seals depend on a clean, cool, pressurised barrier fluid. The Tech Inc. Seal Oil and Barrier Fluid System is built to the API 682 piping plan the seal maker specifies. For refineries and petrochemical plants, it is one of the best upgrades to make at turnaround.

The API 682 plans we build

Plan	What it is
Plan 52	Unpressurised seal pot with buffer fluid
Plan 53A	Seal pot pressurised with nitrogen
Plan 53B	Bladder accumulator with heat exchanger
Plan 53C	Piston accumulator referenced to seal chamber pressure
Plan 54	External circulating system with pump, cooler and filter

What is in the system

• Seal pot reservoir with level gauge and cooling coil

• Bladder or piston accumulator

• Circulating pump unit with cooler and filter (Plan 54)

• Hand refill pump

• Pressure and level transmitters and switches

• Isolation, vent and drain valves

Why it is one of the best things to happen to rotating equipment

• Seals that last. Clean, cool barrier fluid at the right pressure.

• The right plan. Built to the API 682 plan the seal maker specifies.

• Turnaround-ready. Packaged and tested before the shutdown.

• Matched builds. The same team builds our lube oil consoles and seal gas conditioning skids.

Frequently asked questions

Which plan does my seal need?

The seal maker specifies the plan. Tech Inc. builds to that plan and the plant's specification.

What is the difference between Plan 53B and 53C?

Plan 53B uses a bladder accumulator; Plan 53C uses a piston accumulator referenced to seal chamber pressure.

Can you supply a Plan 54 system?

Yes, with circulating pump, cooler, filter and instrumentation.

Send your seal plan, pump data and site specification to mail@techincresearch.com or call +1 (289) 622-1032 for a P&ID and quotation.