Overview of Primary Product

ManualsBrandsCaleffi ManualsAir Valves1/2" NPT Male Service Check Valve

CALEFFI

ISO 9001 No. 0003

ACCREDITED

ISO 9001 FM 21654

DISCAL

air separator

551 series

01060/18 NA

Function

The DISCAL

air separator is used to continuously remove the air

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

discharge capacity is very high. They automatically remove all the air

present in the system down to micro-bubble level with low head loss

due to the special internal shape of the separator body. Flow direction

of the DISCAL air separator is bidirectional; ﬂow in either direction is

permitted.

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

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

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.

Product range

551 series DISCAL air separator for horizontal pipes, in brass compact with drain ..........................connections ¾" integral sweat; ¾" NPT female

551 series DISCAL air separator for horizontal pipes, in brass with drain .......................................connections ¾", 1", 1¼", 1½" and 2" NPT female

1", 1¼", 1½ " and 2" integral sweat

1", 1¼", 1½" and 2" integral press

551 series DISCAL air separator for horizontal pipes, in steel with ﬂanged connections and drain .................................. connections 2" to 6" ANSI

551 series DISCAL air separator for horizontal pipes, in steel with threaded connections and drain ......connections 2" and 2½" integral NPT male

NA551 series DISCAL air separator for horizontal pipes, in steel with ﬂanged connections with drain, ASME and CRN .... connections 2" to 12" ANSI

5517 series DISCAL air separator for horizontal or vertical pipes with rotating collar, in brass with drain....................................................................

connections ¾" and 1" sweat union, press union and NPT male union

Technical specications

Brass air separator

Materials - body: brass

- internal element (compact & rotating collar versions):

304 stainless steel

- internal element: glass reinforced nylon PA66GF30

- air vent ﬂoat: PP

- seal: peroxide-cured EPDM

- air vent ﬂoat linkages: stainless steel

- air vent ﬂoat guide pin: stainless steel

Performance

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)

Air separation efﬁciency: 100% removal to micro-bubble level

Connections - main:

compact series: ¾" integral sweat; ¾" NPT female

horizontal: ¾", 1", 1¼", 1½" and 2" NPT female

1", 1¼", 1½" and 2" integral sweat

1", 1¼", 1½ " and 2" integral press

rotating collar version, 5517 series:

¾" and 1" sweat, press and NPT male union

- lay length (press connections): see page 2

- drain: ½" NPT female

5517 series: ½" straight female

Steel air separator

Materials - body: epoxy resin coated steel

- internal element: 304 stainless steel

- air vent ﬂoat: PP

- seal: peroxide-cured EPDM

- air vent ﬂoat linkages: stainless steel

- air vent ﬂoat guide pin: stainless steel

- side drain shut-off valve: brass

Performance

Suitable ﬂuids: water, glycol solution

Max. percentage of glycol: 50%

Max. working pressure: sizes 2 - 6 inch: 150 psi (10 bar)

sizes 8 - 12 inch: 200 psi (14 bar)

Temperature range (vessel): 32–270°F (0–132°C)

Air separation efﬁciency: 100% removal to microbubble level

Connections - ﬂanged: 2"– 12" ANSI B16.5 150 CLASS RF

- drain pipe: sizes 2 - 6 inch: 1" NPT male

sizes 8 - 12 inch: 2" NPT male

- side drain shut-off valve: ¾" GHT

- thermo well tap (8 - 12" only):

-inlet/outlet ﬂanges: ½" NPT female

Agency Approval

NA551 series is 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

Inspectors, stamped for 150 psi (10 bar) working pressure for 2 - 6

inch, 200 psi (14 bar) for 8 - 12 inch, with ASME U stamp and CRN

registered (CRN pending for 12 inch, consult Calefﬁ).

Replaces 01060/16 NA

Summary of content (8 pages)

PAGE 1
DISCAL® air separator CALEFFI 551 series 01060/18 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 Replaces 01060/16 NA Function The DISCAL® air separator is used to continuously remove the air contained in hydronic circuits of heating and cooling systems. The air discharge capacity is very high. They automatically remove all the air present in the system down to micro-bubble level with low head loss due to the special internal shape of the separator body.
PAGE 2
B A C D A E 1 7 1 551007A* 1 ⁄4" NPT 4 ⁄8" 2 ⁄16" 6 ⁄16" 8 ⁄4" 551008A* 11⁄2" NPT 47⁄8" 2 3⁄16" 6 9⁄16" 81⁄4" 1 551009A* F B 2" NPT 51⁄8" 2 3⁄16" 6 9⁄16" F 81⁄4"G 3 9 A 551028A* 1" SWT 5 ⁄16" 2 ⁄16" 5 ⁄4" B 71⁄2" 551035A* 11⁄4" SWT 5 3⁄16" 2 3⁄16" 6 5⁄16" 81⁄4" 551041A* 11⁄2" SWT 5 3⁄4" 2 3⁄16" 6 9⁄16" 81⁄4" 551054A* 2" SWT 61⁄8" 2 3⁄16" 81⁄4" 1 C 3 3 6 9⁄16" ⁄2" 3.7 3.7 ⁄2" 4.9 ⁄2" 5.5 A D E D A E F Wt (lb) F ⁄4" press B 63⁄8" 31⁄2" 4.
PAGE 3
Dimensions F J E D G D A A E D C WALL G 38466.
PAGE 4
The process of air formation Operating principles The amount of air which can remain dissolved in a water solution is a function of pressure and temperature. This relationship is governed by Henry’s Law and the graph below demonstrates the physical phenomenon of the air release from water. As an example, at a constant absolute pressure of 30 psi (2 bar), if the water is heated from 65ºF (18ºC) to 170ºF (75ºC), the amount of air released by the solution is equal to 1.
PAGE 5
51 and NA551 steel series A replacement air vent assembly for the DISCAL brass 551 series (except rotating collar and compact versions) is code 59829; for the DISCAL steel 551 and NA551 series is code 59756. 4 3 2 59829 A 59756 1 6 The moving parts that control air venting are accessed simply by removing the upper cover (5). Replacement cap and float assembly for all versions of the brass DISCAL 551 and 5517 series is code F39807.
PAGE 6
Air separation efficiency DISCAL air separators continuously remove entrained air in hydronic systems with very high separation efficiency. The amount of air removed from a system varies depending on fluid velocity and temperature. As illustrated on the graph, at the 4.0 feet per second fluid velocity, all the air artificially introduced into the system is gradually eliminated during normal system operation by the DISCAL air separator.
PAGE 7
Insulation shells Accessories Insulation shells for brass DISCAL series for horizontal pipes. These are not designed for the compact or 517 series rotating collar DISCAL. Code Item Size CBN551005 For ¾" and 1" CBN551007 For 1¼" and 1½" CBN551009 For 2" Insulation Material: closed cell expanded PE-X Thickness: 25/64" (10 mm) Density - inner part: 1.9 lb/ft3 (30 kg/m3) - outer part: 3.1 lb/ft3 (50 kg/m3) Thermal conductivity (DIN 52612) - at 32ºF (0ºC): 0.263 BTU·in/hr·ft2·ºF (0.
PAGE 8
Application diagram CHILLER VENT SPECIFICATION SUMMARIES DISCAL® 551 series – Compact Air separator in brass complete with brass automatic air vent containing pinned float. Connections for horizontal pipes, 3/4" NPT female threads or 3/4" sweat. Brass body. Peroxide-cured EPDM seals. 304 stainless steel internal mesh element. PP float. Stainless steel float linkages. Stainless steel float guide pin. Bottom 1/2" NPT female thread for drain. Models available with pre-installed service check valve.