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ManualsBrandsCaleffi ManualsBoiler System AccessoriesDiscal Air Separator, 2-1/2" Flange Connections

DISCAL

air separator

series 551 and NA551

Function

Air separators are used to continuously remove the air contained

in the hydronic circuits of heating and cooling systems. The air

discharge capacity of these devices is very high. They are capable

of removing automatically all the air present in the system down to

micro-bubble level.

The circulation of fully de-aerated water enables the equipment to

operate under optimum conditions, free from any noise, corrosion,

localized overheating or mechanical damage. Micro-bubbles,

fusing with each other, increase in volume (get larger) until they

become large enough to rise to the top where they are

automatically released.

Technical specification

Brass Discal

Materials: - Body: brass

- Int. element (compact version): stainless steel

- Int. element: PA66GF30

- Seal: EPDM

Suitable fluids: water, glycol solution

Max percentage of glycol: 50%

Max working pressure: 150 psi (10 bar)

Temperature range: 32–250°F (0–120°C)

Connections: - Main: compact series: 3/4” sweat; 3/4” NPT female

3/4” - 1” - 1 1/4” - 1 1/2” - 2” NPT female

1” - 1 1/4” - 1 1/2" - 2" sweat

- Drain: 1/2” NPT female

Steel Discal

Materials: - Body: epoxy resin painted steel

- Int. element: stainless steel

- Seal: EPDM

Suitable fluids: water, glycol solution

Max percentage of glycol: 50%

Max working pressure: 150 psi (10 bar)

Temperature range: 32–250°F (0–120°C)

Connections:

- Flanged (ASME Registered): 2” – 6” ANSI B16.5 150 CLASS RF

- Flanged: 2” – 4” ANSI B16.5 150 CLASS RF

- Threaded: 2” – 4”

- Drain: 1” NPT male

CALEFFI

Product range

Series 551 DISCAL air separator in brass compact Sizes 3/4” sweat; 3/4” NPT female

Series 551 DISCAL air separator in brass Sizes 3/4” - 1” - 1 1/4” - 1 1/2” - 2” NPT female; 1” - 1 1/4” - 1 1/2" - 2" sweat

Series 551 DISCAL air separator in steel with flanged connections Sizes 2” – 6” ANSI

Series NA551 DISCAL air separator in steel with flanged connections designed and built in accordance with Section VIII,

Division 1 of the ASME Boiler and Pressure Vessel Code and tagged and registered with the National Board of

Boiler and Pressure Vessel Inspector Sizes 2” – 6” ANSI

Series NA551 DISCAL air separator in steel with threaded connections designed and built in accordance with Section VIII,

Division 1 of the ASME Boiler and Pressure Vessel Code and tagged and registered with the National Board of

Boiler and Pressure Vessel Inspector Sizes 2” – 4”

01060/10 NA

Replaces 01060/09 NA

ACCREDITED

ISO 9001 No. 0003

ISO 9001 FM 21654

Summary of content (4 pages)

PAGE 1
DISCAL® air separator CALEFFI series 551 and NA551 01060/10 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 Replaces 01060/09 NA Function Air separators are used to continuously remove the air contained in the hydronic circuits of heating and cooling systems. The air discharge capacity of these devices is very high. They are capable of removing automatically all the air present in the system down to micro-bubble level.
PAGE 2
Dimensions D C 6 6 5/8” 5/8” 7/8” 7/8” D C 5 3/4” 5 3/4” 6 9/16” 6 9/16” 6 9/16” 5 3/4” 6 5/16” 6 9/16” 6 9/16” C E B E B A A E B B 4 5/16” 4 5/16” 4 7/8” 4 7/8” 5 1/8” 5 1/16” 5 3/16” 5 3/4” 6 1/8” D 2.0 2.
PAGE 3
Operating principle Construction details The air separator uses the combined action of several physical principles. The active part consists of an assembly of concentric mesh surfaces. These elements create the whirling movement required to facilitate the release of micro-bubbles and their adhesion to these surfaces. DISCAL devices are constructed in such a way as to allow maintenance and cleaning operations to be carried out without having to remove the valve body from the pipework.
PAGE 4
6” 5” 4” 3” 2 1/2” 2” 2” Steel 1 1/2" 1 1/4" Installation 1" ∆P (ft of wtr) 1 3/4" 3/4" C Hydronic characteristics (ft of wtr) (kPa) 1 3 0.9 0.8 0.7 0.9 0.8 0.7 2,5 2,0 0.6 0.6 0.5 0.5 0.3 0.3 0.25 0.25 0.2 0.2 0.12 0.12 0.1 0.1 0.06 0.06 0.05 0.05 0.035 0.03 0.035 0.03 0.025 0.025 0.02 0.02 0.45 0.4 0.35 0.45 0.4 0.35 0.18 0.16 0.14 0.18 0.16 0.14 0.09 0.08 0.07 0.09 0.08 0.