Product Overview

ManualsBrandsCaleffi ManualsAir Eliminators2" NPT Female DISCAL Air Separator with Automatic 1/2" Check

CALEFFI

ACCREDITED

ISO 9001 No. 0003

ISO 9001 FM 21654

DISCAL

air separator

551–NA551–NA5519 series

01060/12 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 the

micro-bubble level.

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 3/4" sweat; 3/4" NPT female

551 series DISCAL

air separator for horizontal pipes, in brass with drain .............................. connections 3/4", 1", 1-1/4", 1-1/2" and 2" NPT female

1", 1-1/4", 1-1/2" and 2" sweat

551 series DISCAL

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

NA551 series DISCAL

air separator for horizontal pipes, in steel with ﬂanged connections with drain, ASME and CRN ..... connections 2" to 6" ANSI

NA5519 series DISCAL

air separator for vertical pipes, in brass ....................................................................... connections 3/4" and 1" integral sweat

Technical speciﬁcations

Brass air separator

Materials - body: brass

- internal element

(compact & vertical versions): 304 stainless steel

- internal element: glass reinforced nylon PA66GF30

- seal: EPDM

- 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)

Connections - main:

compact series: 3/4" sweat; 3/4" NPT female

horizontal: 3/4", 1", 1-1/4", 1-1/2" and 2" NPT female

1", 1-1/4", 1-1/2" and 2" sweat

vertical: 3/4" and 1" sweat

- drain valve: 1/2" NPT female

Steel air separator

Materials - body: epoxy resin painted steel

- internal element: 304 stainless steel

- seal: EPDM

- 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)

Connections - ﬂanged: 2"– 6" ANSI B16.5 150 CLASS RF

- drain pipe: 1" NPT male

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 Inspector, and CRN registered.

Summary of content (6 pages)

PAGE 1
DISCAL air separator ® CALEFFI 551–NA551–NA5519 series 01060/12 NA ACCREDITED ISO 9001 FM 21654 ISO 9001 No. 0003 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 the micro-bubble level.
PAGE 2
Dimensions G C C C D E ⁄4" 3 ⁄16" 2 ⁄16" 3 5 ⁄8" 7 6 ⁄8" 1 ⁄4" SWT 31⁄16" 2 3⁄16" 5 3⁄8" 6 7⁄8" 1 551003A* 3 3 F Wt (lb) Code ⁄2" 2.0 ⁄2" 2.0 ⁄2" ⁄2" NA551995 3 ⁄4" 5 ⁄16" 2 ⁄16" NA 9 ⁄16" 1 NA551996 1" 61⁄16" 2 3⁄16" NA 9 9⁄16" 1 1 3 3 B C 551005A* ⁄4" 4 ⁄16" 2 ⁄16" 551006A* 1" 4 5⁄16" 4.5 551007A* 4.5 551008A* 551009A* E D A A A A E D C F B F D WALL 38466.01 E D A 38466.
PAGE 3
Boiler micro-bubbles M i c ro - b u b b l e s a re formed continuously on the surface separating the water from the combustion chamber due to the f l u i d t e m p e r a t u re . This air, carried by the water, collects in the critical points of the circuit from where it must be removed.
PAGE 4
Construction details DISCAL air separators are designed to allow maintenance and cleaning without having to remove the valve body from the pipework. All DISCAL air separators (except vertical versions) come standard with a bottom connection for installing a drain valve. All internal air release control components are fully accessible in all the models. ® ® 5 The automatic air vent, located at the top of the units, has a long chamber for the movement of the float.
PAGE 5
Flow capacity Hydraulic characteristics The fluid velocity at connections for DISCAL 551 series air separators is recommended to not exceed 10.0 f/s. Above this speed, heavy internal P (ft of wtr) turbulence and noise can occur and air and dirt elimination efficiency 1 begins to fall measurably. Optimal air elimination performance occurs at fluid velocities of 4.0 f/s or less. See the 0.5 flow capacity charts below. Flow capacity — steel Size 2" 2 ⁄2" 3" 4" 5" 6" Optimal (4.0 f/s) GPM 37.3 63.
PAGE 6
Application diagram CHILLER SPECIFICATION SUMMARIES DISCAL 551 Series — Compact Air separator in brass. Connections for horizontal pipes, 3/4" NPT female threads or 3/4" sweat. Bottom 1/2" NPT female thread for drain. Models available with pre-installed service check valve. Brass body. Stainless steel float guide pin. EPDM seal. 304 stainless steel internal mesh element. Maximum working pressure 150 psi (10 bar), Temperature range 32 to 250°F (0 to 120°C). Glycol maximum 50%.