Archives: Documents

Description: Plan 21 is recirculation from pump discharge through an 1/8” minimum flow control orifice (when necessary), and seal flush cooler, then into the seal chamber. Objective: Cool the process in the seal chamber, improving lubricity and increasing the vapor margin. Reduce coking. Advantages: Provides cooling through a seal flush cooler. When used with a […]

Description: Plan 14 is recirculation from pump discharge through a properly sized flow control orifice (when necessary), to the seal chamber and from the seal chamber through a properly sized flow control orifice (when necessary), to the pump suction. (A combination of Plan 11 and Plan 13) Objective: Remove seal generated heat and vent vertical […]

Description: Plan 13 is recirculation from the seal chamber or gland through an 1/8” minimum flow control orifice (when necessary), back to the pump suction. Standard flush plan for vertical pumps. Objective: Remove seal generated heat and vent vertical pumps. Advantages: Used in applications where the seal chamber pressure is greater than suction pressure. Can […]

Description: Plan 01 is an integral recirculation from the pump discharge to the seal chamber. This is an internal version of Plan 11. Recommended for clean process only. Advantages: No exposed plumbing around pump. Reduces risk of freezing or polymerization of process. Not recommended for vertical pumps. Description: Plan 11 is recirculation from pump discharge […]

Description: Plan 03 is a dead‐ended seal chamber with an open throat, tapered seal chamber and flow modifiers to generate product circulation. Objective: Dissipate seal generated heat, vent and drain the seal chamber, and aid in the removal of solids. Advantages: Little to no maintenance. Process solids will not collect as they do in a […]

Description: Plan 02 is a dead‐ended seal chamber with no recirculation of flush fluid. Objective: Often used with a jacketed seal chamber to control temperature in high temperature processes. Use only when adequate vapor margin is present in the seal chamber. Advantages: Little to no maintenance. Process solids are not continuously introduced into seal chamber. […]