EVQ API Plan 52/53A Mechanical Seal Support Systems

PRODUCT FEATURES

•The EV system is a complete barrier fluid system that provides fast and trouble-free field installation for most application scenarios. These systems are pre-assembled and include all necessary components and accessories.

•Part of the medium in the pressure system is the barrier fluid , which is then pressurized through a connection to the plant's gas supply. The system can also be pressurized by moving a nitrogen cylinder. The seal is cooled by a "thermosiphon" effect.

APPLICABLE INDUSTRIES

•Process pumps

•Arduous applications demanding pressurized barrier fluid

•Mixer and agitators

•Wide range of applications requiring high reliability across oil and gas, chemical and general Industry, and high-purity and organics

•High abrasives content

•Slurries

PRODUCT APPLICATION

For API Plan 53A

•EV series thermosiphon system is used with the double seals of arrangement 3 seal , that is, the pressure of the isolation fluid is higher than the maximum pressure of the seal chamber and at least 0.14MPa (20psi) higher, which can be achieved by flushing nitrogen at the top of the reservoir.

•This scheme is usually used in services where no leakage to atmosphere can be tolerated, It may also be selected for applications where the pump may be operated dry or the pump process fluid may be damaging to the seal faces.

•Plan 53 is usually chosen over Plan 52 for dirty, abrasive or polymerizing products that would either damage the seal faces or cause problems with the buffer liquid system if Piping Plan 52 were used.

•The clean barrier liquid provides lubrication to the seal faces, but the barrier liquid that passes across the inner seal faces will enter the pumped process stream. Therefore, the process liquid shall be compatible with the barrier liquid and be able to tolerate a small amount of contamination from the barrier liquid.

SYSTEM PARAMETERS

SYSTEM MATERIALS