Mechanical seals and flushing/cooling systems

(Diagram Courtesy Flowserve) Mechanical seals need to be understood by plant operators for their proper operation. Many times, the operations and maintenance personnel are at loggerheads because many of the operation personnel do not fully understand the principles of seal flushing/cooling systems. Flowserve has a very good mechanical seal piping plan document in this link which clearly explains the functioning for various types.