Plan 53A - Dual seals, pressurised - External reservoir pressurised liquid barrier

Features

Description: Plan 53A uses an external reservoir to provide barrier fluid for a pressurised dual seal arrangement. Reservoir pressure is produced by a gas, usually nitrogen. Flow is induced by a pumping ring.

Advantages: Reservoir  size can be optimized dependent on flow rate. Wear particles settle to bottom of reservoir and don’t get recirculated.

General: Heat is dissipated by reservoir cooling coils. Barrier fluid is subject to gas entrainment at pressures/temperatures above 300 psi/2500F.