Gas-lubricated Mechanical Seal or
Dry Gas Seal

FEATURES:

How the Flexaseal GFR and GFL Operate

• Inert gas enters in the wide, deeper grooves on the OD of the rotating seal ring face.

• As the shaft rotates, the gas compresses as it passes through the narrowing of the seal ring’s spiral grooves.

• The resultant gas film pressure provides an opening force slightly greater than the net closing forces, which cause the faces to separate and not contact.

• Advantages of non-contacting dual gas seal versus a liquid-lubricated dual seal for API 682 Plans 53 and 54:

• Extended seal life due to non-contacting seal faces eliminating friction and wear

• Non-contacting faces significantly reduce the amount of heat buildup at the faces, external cooling is not necessary

• Designed to run dry; excellent for batch run operations like tank unloading when operators neglect to shut pump down

• No pumping ring is necessary to circulate barrier fluid

• Simple support system – utilizes API 682 Plan 74 instead of more complex Plans 53 or 54, lowering the cost of operation and maintenance of the seal support system

• Zero emissions just like seals using a pressurized liquid barrier fluid system

• 100% product purity: Nitrogen is clean and inert, eliminating product/barrier fluid compatibility issues

• Reduced power consumption