CALEFFI. DISCAL deaerator. 551 series 01060/17 GB. replaces dp 01060/14 GB

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1 ISL deaerator series RI ISO 900 M 654 LI 0060/7 G replaces dp 0060/4 G unction eaerators are used to continuously remove the air contained in the hydraulic circuits of heating and cooling systems. he air discharge capacity of these devices is very high. hey are capable of automatically removing all the air present in the system down to micro-bubble level. he circulation of fully deaerated water enables the systems to operate under optimal conditions, free from any noise, corrosion, localised overheating or mechanical damage. In the threaded versions it is available for installation on horizontal pipes, and with adjustable -fitting for installation on horizontal and vertical pipes. langed and weld-end ISL deaerators are supplied complete with hot pre-formed shell insulation to ensure perfect heat insulation when used in both hot and chilled water systems. Optional insulation is available for the threaded model with 3/4 and drain. Only applicable to threaded versions Product range series ISL deaerator for horizontal pipes, compact version size N (3/4 ) series ISL deaerator for horizontal pipes with olive fittings, compact version size N (Ø ) series ISL deaerator for horizontal pipes with drain sizes N (3/4 ); N 5 ( ); N 3 ( /4 ); N 40 ( / ); N 50 ( ) series ISL deaerator for horizontal and vertical pipes, compact version with adjustable -fitting sizes N (3/4 ), N 5 ( M and ) series ISL deaerator for horizontal and vertical pipes, compact version with adjustable -fitting sizes N (Ø ), N 5 (Ø 8) series ISL deaerator for horizontal pipes with flanged connections and insulation with drain sizes N 50 N 50 series ISL deaerator for horizontal pipes with flanged connections and floor-mounted supports sizes N 0 N 300 series ISL deaerator for horizontal pipes with weld-end connections and insulation with drain sizes N 50 N 50

2 echnical specifications series threaded flanged and weld-end Materials ody: brass N 65 W67N epoxy resin coated steel Internal element: P66G30; stainless steel compact version stainless steel loat: PP PP loat guide: brass N 64 W64N brass N 64 W64N Stem: brass N 64 W64N brass N 64 W64N loat lever: stainless steel N (ISI 30) stainless steel N (ISI 30) Spring: stainless steel N (ISI 30) stainless steel N (ISI 30) -fitting locking nut (7 series): brass N 4 W67N -fitting (7 series): brass N Hydraulic seals: PM PM rain cock: - brass N 65 W67N, chrome plated Performance Media water, non-hazardous glycol solutions water, non-hazardous glycol solutions excluded from the scope of directive 67/548/ excluded from the scope of directive 67/548/ Max. percentage of glycol: 50% 50% Max. working pressure: 0 bar 0 bar Max. discharge pressure: 0 bar 0 bar Working temperature range: onnections Main: - 3/4,, /4, /, N 50-N 50, PN 6 - with compression ends for Ø mm copper pipe; N 0 N 300, PN 0 - with adjustable -fitting for copper pipe; to be coupled with flat counterflange N 09- Ø and Ø 8 mm; N 50 N 50 weld-end - with adjustable -fitting 3/4, and M Probe holder: N 0 N 300, / inlet/outlet rain: / (with cap) N 50 N 50, M (with cap) N 0 N 300, Insulation technical specifications for threaded models codes 005/9 closed cell expanded P-X 0 mm ensity: - inner part: 30 kg/m 3 - outer part: 80 kg/m 3 hermal conductivity (ISO 58): - at 0 : 0,038 W/(m K) - at 40 : 0,045 W/(m K) oefficient of resistance to water vapour (IN 565): >.300 Working temperature range: 0 0 Reaction to fire (IN 40): class echnical specifications of insulation for flanged models from N 50 to N 00 Inner part rigid closed cell expanded polyurethane foam 60 mm ensity: 45 kg/m 3 hermal conductivity (ISO 58): 0,03 W/(m K) Working temperature range: 0 05 Head covers Heat moulded material: PS xternal cover embossed unfinished aluminium 0,7 mm Reaction to fire (IN 40): class echnical specifications of insulation for flanged models N 5 and N 50 Inner part closed cell expanded P-X 60 mm ensity: - inner part: 30 kg/m 3 - outer part: 80 kg/m 3 hermal conductivity (ISO 58): - at 0 : 0,038 W/(m K) - at 40 : 0,045 W/(m K) oefficient of resistance to water vapour (IN 565): >.300 Working temperature range: 0 00 Reaction to fire (IN 40): class xternal cover embossed unfinished aluminium 0,7 mm Reaction to fire (IN 40): class

3 I-IRIONL max 0 max 05 Pmax 0 bar Pmax 0 bar imensions ode 003 3/ Mass (kg) 0,9 ode â 05/3 06/3 08/3 N 50 N 65 N /3 N /3 N /3 N Mass (kg) " 5,5 " 5,5 " 8,5 " 30,5 " 48,5 " 53,5 ode N N N Mass (kg) Size Volume (l) N 50 7 N 65 7 N 80 8 N 00 8 N 5 5 N ,0 Size N I-IRIONL max 0 Pmax 0 bar ode 00 Size N Ø Mass (kg) 0,9 N 0 N N ode Size Mass (kg) 005 N 3/ /",7 006 N 5 " /",7 007 N 3 /4" /" 008 N 40 /" /",, 009 N 50 "zz /",5 / ode Size 705 N 3/4" ,5 706 N 5 40,6 30 4,5 9 9 Mass (kg),05,38 ode Size 70 N 703 N 5 Ø Ø8 / / Mass (kg) 3 6,5 4,5 9, ,5 9, ode 76 Size Mass (kg) N ,5 9,07

4 he air formation process he amount of air which can remain dissolved in a water solution depends on the pressure and temperature. his relationship is known as Henry s law; the graph below allows us to quantify the physical phenomenon of releasing the air contained in the medium. or example: at a constant absolute pressure of bar, if the water is heated from to 80, the amount of air released by the solution is equal to 8 l per m 3 of water. ccording to this law, it may be noted how the amount of air released by the solution increases as the temperature rises and the pressure decreases. his air is in the form of micro-bubbles with diameters in the order of tenths of a millimetre. In circuits of air-conditioning systems there are specific points where this micro-bubble formation process takes place continuously: inside boilers and devices which operate under conditions of cavitation. Graph of solubility of air in water avitation micro-bubbles Micro-bubbles develop where the speed of the medium is particularly high, with a corresponding reduction in pressure. hese points are usually the pump impellers and the water orifices of the regulating valves. hese microbubbles of air and steam, the formation of which is accentuated in non-deaerated water, may subsequently implode as a result of the cavitation effect. Pressure Seat-obturator distance Steam pressure Pressure Implosions avitation micro-bubbles Speed Speed N Maximum amount (in litres) of dissolved air per m 3 of water (l/m 3 ) bsolute pressure 3 bar 4 bar 5 bar 6 bar 7 bar 8 bar bar bar Operating principle he deaerator utilises the combined action of several physics principles. he active part consists of a set of concentric metal mesh surfaces (). hese elements create the swirling motion required to facilitate the release of micro-bubbles and their adhesion to the surfaces. he bubbles, fusing with each other, increase in volume until the hydrostatic thrust is sufficient to overcome the force of adhesion to the structure. hey then rise towards the top of the device and are expelled through a float-operated automatic air vent valve (). It is designed in such a way that the direction in which the medium is flowing inside it makes no difference. Water temperature ( ) oiler micro-bubbles Micro-bubbles form continuously on the surfaces separating the water from the combustion chamber due to the high temperature of the medium. his air, carried by the water, collects at critical points of the circuit, from which it must be removed. Some of it is reabsorbed where it meets colder surfaces. lame temperature 000 ombustion chamber wall LM Wall temperature 60 oundary layer WR Micro-bubbles oundary layer temperature 56 verage water temperature 70

5 - When cleaning, simply unscrew the portion of the body containing the automatic air vent valve (4). On threaded models without drain and in the 7 series with adjustable -fitting, this part is 4 not removable (5). 4 langed and weld-end deaerators are equipped with a cock () which performs the dual function of releasing large amounts of air while the system is being filled and eliminating any impurities floating on top of the water. he lower part is fitted with a plug () which can be connected to a drain valve, for the elimination of any impurities which have collected at the bottom of the deaerator. 5 onstruction details he automatic air vent valve, located at the top of the device, is equipped with a long chamber for float movement. his feature prevents any impurities in the water from reaching the seal seat. he special construction of the ISL deaerator allows maintenance and cleaning procedures to be performed without removing the device from the system. Note in particular: - ccess to the moving parts controlling the air vent is attained by simply removing the top cover (3). 3 ir separation efficiency ISL devices are capable of continuously removing the air contained within a hydraulic circuit, with a high degree of separation efficiency. he amount of air that can be removed from a circuit depends on different parameters: it increases as the circulation speed and the pressure decrease. s illustrated on the graph below, after just 5 recirculations at the maximum recommended speed, almost all the air artificially released into the circuit (blue curve on the graph) is eliminated by the deaerator, with percentages which vary on the basis of the pressure within the circuit. he small amount which remains is then gradually eliminated during normal system operation. In conditions where the speed is slower or the temperature of the medium is higher, the amount of air separated is even greater. ir introduced - ir removed - (%) bar bar 3bar No. of recirc ime (s) V = m/s - = constant

6 Insulation langed (N 50 N 50) and weld-end ISL devices are supplied complete with hot pre-formed shell insulation. he threaded models codes can be equipped with hot pre-formed shell insulation as an option. his system ensures not only perfect thermal insulation, but also the tightness required to prevent water vapour entering the device from the ambient. or this reason, this type of insulation may also be used in chilled water circuits as it prevents condensation from forming on the surface of the valve body. Hydraulic characteristics p (mm w.g.) ,5 3,5,8,6,4, 0,9 0,8 0,7 0,6 0,3 p (kpa) 0,5 0,45 0,4 0, ,5 0,6 0,7 0,8 0,9,,4,6,8, ,5 4 4, ,5 0, 0,8 0,6 0,4 0, 0, G (m 3 /h) 50 Ø (00) 3/4" (003) Ø - Ø 8-3/4" - djustable version 3/4" " /4" /" N 50 N 65 N 80 N 00 N 5 N 50 N 0 N 50 N 300 N 5 /5 djustable version onnection Ø - 3/4 3/4 Ø - Ø 8-3/4 - /4 / Kv (m 3 /h) 0,0 6,,0 8, 48,8 63, 70,0 N Kv (m 3 /h) 75,0 50,0 80,0 80,0 450,0 7, ,0 500,0 he maximum recommended flow speed at the device connections is ~, m/s. he following table shows the maximum flow rates in order to meet this requirement. N / 5 adjustable 5 adjustable onnections Ø - 3/4 Ø - 3/4 Ø 8 - /4 / l/min,7,7 35,8 35,8 57,85 90,33 36,6 m 3 /h,36,36,, 3,47 5,4 8, N l/min 4, 38,6 36,5 564,8 980,0 436,6 433,0 3866,0 546,0 m 3 /h) 8,47 4,3,69 33,89 58,8 86, 46,0 3,0 35,0

7 Installation ISL devices may be used in both heating and cooling circuits, to guarantee progressive elimination of the air which forms continuously. hey should preferably be installed after the boiler, on the pump suction side, as this is where the formation of micro-bubbles is most prolific. he ISL deaerator must be installed vertically and preferably upstream from the pump where, due to the high speed of the medium and the ensuing drop in pressure, micro-bubbles of air develop more easily. In ISL devices, the thermal medium can flow in either direction, except on the 7 series adjustable version, for which the correct direction of flow is shown by the arrow on the -fitting. In the 7 series, turn the -fitting by hand to adapt the connections for use with horizontal or vertical pipes. It is recommended that the air vent valve cap is replaced with a aleffi 56 series hygroscopic safety cap if the device is installed in a location that cannot be inspected. HILLR pplication diagram P Shut-off valve low switch Safety thermostat est pocket nti-vibration joint all valve LLSOP emperature gauge ifferential by-pass valve Zone valve Pump UOLOW low rate metering device emperature probe P Regulator xpansion vessel 3-way cock Pressure switch Gas filter Gas regulator Y-strainer uel shut-off valve Pocket Safety relief valve ackflow preventer utomatic filling unit

8 SPIIION SUMMRY ISL series eaerator for horizontal pipes, version with drain. Size N (N to N 50); 3/4 connections (3/4 to ) (ISO 8-). rain / (with plug). rass body. P66G30 internal element. PP float. rass float guide and stem. Stainless steel float lever and spring. PM hydraulic seals. Rigid closed-cell expanded polyurethane foam insulation shell available as an option for codes Medium water and non-hazardous glycol solutions excluded from the guidelines of directive 67/548; maximum percentage of glycol 50%. Maximum working pressure 0 bar. Maximum discharge pressure 0 bar. Working temperature range 0 0. ISL series eaerator for horizontal pipes, compact version. Horizontal size N, 3/4 connections (ISO 8-); size N, Ø connections with compression ends. rass body. Stainless steel internal element. PP float. rass float guide and stem. Stainless steel float lever and spring. PM hydraulic seals. Medium water and non-hazardous glycol solutions excluded from the guidelines of directive 67/548; maximum percentage of glycol 50%. Maximum working pressure 0 bar. Maximum discharge pressure 0 bar. Working temperature range 0 0. ISL series eaerator for horizontal or vertical pipes, compact version with adjustable -fitting. Size N, 3/4 connections (ISO 8-); size N 5, M (and ) connections (ISO 8-); size N (and N 5), Ø (and Ø 8) connections with compression ends for copper pipe. rass body. Stainless steel internal element. PP float. rass float guide and stem. Stainless steel float lever and spring. PM hydraulic seals. Medium water and non-hazardous glycol solutions excluded from the guidelines of directive 67/548; maximum percentage of glycol 50%. Maximum working pressure 0 bar. Maximum discharge pressure 0 bar. Working temperature range 0 0. ISL series eaerator. langed connections N 50 (from N 50 to N 50) PN 6, flanged connections N 0 (from N 0 to N 300) PN 0, to be coupled with flat counterflange N 09-. Weld end connections N 50 (from N 50 to N 50). M brass drain valve with cap (from N 50 to N 50), (from N 0 to N 300). poxy resin coated steel body. Stainless steel internal element. PM hydraulic seals. Medium water and non-hazardous glycol solutions excluded from the guidelines of directive 67/548; maximum percentage of glycol 50%. Maximum working pressure 0 bar. Maximum discharge pressure 0 bar. Working temperature range 0-0. utomatic air vent: brass body, PP float, brass float guide and stem, stainless steel float lever and spring. Rigid closed-cell expanded polyurethane foam insulation for sizes up to N 00 (closed-cell expanded P-X for N 5 and N 50) and embossed unfinished aluminium external cover. Working temperature range 0 05 (0 00 for N 5 and N 50). We reserve the right to make changes and improvements to the products and related data in this publication, at any time and without prior notice. aleffi S.p.. S.R. 9 no ontaneto d gogna (Novara) Italy el ax info@caleffi.com opyright 7 aleffi