I. Working Principle

Plan72 (Buffer Gas System)

Clean and dry nitrogen is supplied from an external source and injected between the primary and secondary seal at a pressure slightly lower than the process pressure.

It provides isolation, purging, and dilution of leaked process fluid, maintaining a stable and clean operating environment for the dry gas seal.

Plan76 (Vented Leakage Recovery System)

Collects process gas and buffer gas leaked from the secondary seal, and routes them to a flare, incinerator, or recovery system. This ensures zero atmospheric emission, safe disposal,

and enables leakage monitoring and alarm.

II. Key Features

Tandem dual seal structure: secondary seal acts as a reliable backup if primary seal fails Ideal for volatile, flammable, toxic, and hazardous fluids Zero/low emission design compliant with environmental and VOCs regulations Stable operation, long service life, low maintenance cost Supports leakage detection, pressure monitoring, and remote alarm

III.Typical Applications

Light hydrocarbon pumps, LPG pumps, ethylene / propylene pumps

Refining applications: gasoline, naphtha, aromatics, etc.

Flammable, toxic, and volatile fluids in chemical processes

If you need to know the detailed parameters, customization plan or quotation of the P72+P76 seal support system, please feel free to contact us. Our professional team will provide you with one-on-one service in a timely manner to help you smoothly achieve your procurement needs.