Brochure
Air separators for solar heating systems
DISCAL SOLAR
251 series
Product range
Code 251003A Air separator for solar heating systems with drain size 3/4” F NPT
Technical specifications
Materials: - body: brass chrome plated
- cover: brass chrome plated
remylop ecnatsiser hgih :taolf -
leets sselniats:tnemele lanretni -
- float guide: brass
- valve stem: dezincification resistant brass
leets sselniats:revel taolf -
leets sselniats:gnirps -
- seals: high resistance elastomer
snoitulos locylg ,retaw:muideM
%05:locylg fo e
gatnecrep .xaM
Working temperature range: -20 to 320ºF (-30 to 160ºC)
Max. working pressure: 150 psi (10 bar)
Max. discharge pressure: 150 psi (10 bar)
F NPT ”4/3Connections: - Main
Dimensions
Function
Air separators are used to continuously eliminate air from the primary circuits of
solar heating systems. The air vent capacity of these devices is extremely high.
They are able to automatically remove all the air from the solar circuits, including
microbubbles. The circulation of fully separated fluid allows the system to work under
optimal conditions without any trouble with noise, corrosion, local overheating and
mechanical damage.
This particular series of air separaots has been specifically designed to work at high
temperature with a glycol medium, which is typical of solar heating systems.
A
3/4"
B
3”
C
2
1/8”
D
5
5/8
”
F
6
7/8”
Code
251
003A
Weight (lb)
2.0
CALE FFI
General
The removal of dissolved gases from a solar primary circuit is an essential process in
a solar heating system. The presence of dissolved oxygen in a solar circuit causes rapid
localized corrosion in collectors and heat exchangers. Carbon dioxide will dissolve in
water, resulting in low pH levels and the production of corrosive carbonic acid. Low pH
levels in a solar circuit causes severe acid attack throughout the solar heating system.
While dissolved gases and low pH levels in the solar circuit can be controlled by the
addition of chemicals, it is more economical and thermally efficient to remove these
gases mechanically. This mechanical process is known as air separation and will
increase the life of a solar heating system dramatically.
- Drain: 1/2” F NPT
C
A
D
B
E
A
T
max
= 160°C / 320°F
P
max
= 10 bar / 150 psi
F
E
1/2”