Pressurisation set 0 pages

Pressosmart
Pressurisation set
Alfa Laval manufactures and sells a complete line of
pressurisation
sets: the Pressosmart range. With a simple,
unique design and very high reliability, these pressurisation
sets allow control and efficiency, steadily maintaining constant
pressure in a closed water loop. Pressurisation sets can
be used in a very wide range of applications in heating, air
conditioning and industrial fields where low temperature, high
pressure, overheated
or chilled water closed loop systems are
being used as heating or cooling sources.
When installed in a closed loop water system where temperature
variations occur, the Pressosmart pressurisation set
performs four main functions automatically:
- Maintenance of a constant and steady pressure
- Expansion
- Filling-up
– Disconnection
Operating principle
When water temperature rises:
The internal pressure of the closed loop water system
increases until it exceeds the pressure control valve setting
value, which then opens and lets water flow back to the open
expansion vessel.
When water temperature decreases:
The closed loop water system internal pressure falls until it
reaches the pressure controller set point which then activates
the pump(s).
Main components
A pressurisation set of the Pressosmart range consists of two
parts delivered separately that the contractor has to reassemble
together on site:
A ‘‘pump module’’ with a painted base frame fitted with:
- One or two pumps (depending on model)
- One or two pressure control valves (depending on model)
- A set of black steel connecting pipes
- An electronic pressure transducer (or pressure switches)
- The electrical panel including the pressure controller,
contactors
and overload protections for the pump motors
A PPH (polypropylene) open expansion vessel fitted with:
- A drain port
- An overflow port
- A port for connecting the automatic fill-up solenoid valve
(delivered loose – 230V / 1Ph / 50 Hz coil)
- Two ports for fitting the level control float devices
- Two ports for connection of the pump module
- A removable top cover enabling internal inspection of the
vessel and introduction of chemical treatment products