IM-P537-01
EMM Issue 1
12
Pressurised Thermophysical deaerator with operator manual for the control unit
2.1 Description
The thermophysical deaerator is used in most systems requiring removal of gases that can damage boilers
and pipes.
The theories involved in the removal of gases dissolved in liquids are based on tables and chemical principles,
such as Dalton's and Henry's Law. All gases become soluble when the water steam pressure and the dissolved
gas pressure exceed the pressure imposed on the system. Water cannot contain dissolved gases at 100
°C saturation temperature at atmospheric pressure or 120.4 °C at 1 bar (assuming sea level conditions).
2. General product information
Fig. 1
The PDA unit consists of the following main parts:
1.
Primary steam assembly
2.
Thermophysical deaerator and instrumentation/accessories/protection/safety devices
3.
Make-up water assembly
4.
Electrical control panel
For detailed parts list and specifications, refer to the P&ID and documentation provided with the unit.
Notes:
1.
For further information regarding each particular element of the system, refer to the specific technical
documentation (TI) for each product.
2.
Further technical information regarding PDA thermophysical pressurised deaeration solutions can be
found in the TI-5B.175-E.
