Condensation chambers are required for all high-displacement meter bodies (bellows-type controllers, indicators,
and recorders) and are recommended for all other steam flow meters.
Condensation chambers perform the following functions in steam metering:
• Their large volume provides a reservoir for supplying condensate to the impulse leads on high displacement flow meter bodies.
• Their large surface area permits the rapid generation of cool condensate for filling the impulse leads and permits the meter to be returned to service faster.
• Excess condensate backflushes the lines between the chambers and the root valves, preventing the concentration and crystallization of soluble salts in impulse lines.
Flow meters installed with condensation chambers may require winterizing protection to prevent freezing of impulse leads and meter bodies.