Plan 53A

Position:

Between inner and outer seal (double seal)

Description:

An external reservoir provides a suitable pressurized barrier fluid for the inner and outer seal. The pressure of this barrier fluid is at least 1.4 bar (0.14 MPa) above the pressure in the seal chamber.

The system is pressurized with a gas cushion directly above the barrier fluid.

The circulation of the barrier fluid is carried out by a pump device in the mechanical seal.

Common use:

• To eliminate leakage of the medium to be sealed to the atmosphere
• For dirty, solid containing or polymerizing media to be sealed
• In applications where sealing operation by the medium to be sealed itself is not possible
• At moderate pressures in the seal chamber
• At constant pressure in the seal chamber
• To prevent dry running of the process-side (inner) seal
• For cooling the process-side (inner) mechanical seal
• For cooling the non-process-side (outer) mechanical seal

Application example:

Sealing of slurries with abrasive components in pumps with double-acting mechanical seals to eliminate leakage (medium to be sealed) to the atmosphere, as well as for lubrication and cooling of the seal faces.