Mechanical seal piping plan 11

Description

Product recirculation from pump discharge to seal through a flow control orifice.

Features

1. Prevents product from vaporizing by maintaining positive pressure above vapour pressure.
2. Becomes a self-venting plan for horizontal pumps.
3. Default API Plan for most single seals.

Use

1. In general, applications with clean non-polymerizing fluids with moderate temperatures.

Caution

1. Calculation of recirculation flow rate, heat removal and orifice size are required.
2. Orifice size should be at least 1/8” (3.2mm).
3. Check the margin between discharge pressure and seal chamber pressure to ensure proper flow of fluid.
4. Do not use with media containing solids and abrasives.

API pump seal plan 11 (single seal)