Danfoss DBC Air Eliminators Data sheet

Data sheet DBC

Air Eliminators
For Heating and Cooling Systems

Features:

Performance Principal /
Induced Turbulence:

DBC air eliminators allow hydronic heating and
cooling systems to operate at their maximum
performance by quickly removing dissolved gas
particles and microscopic air bubbles from the
system. This translates to reduced corrosion,
higher system efficiencies, quicker start-ups and
decreased maintenance call backs.

As system fluid enters the air separating
chamber containing a metal lattice matrix,
the flow of the fluid becomes turbulent. The
turbulent flow causes variations in velocity and
pressure resulting in the accumulation of micro­air bubbles on the surface of the lattice.

As the bubbles merge, the buoyancy force
on the bubbles cause them to float to the
upper chamber of the air eliminator where it is
regulated and released by a float mechanism.

Vent Chamber:

Installation Examples:

The float mechanism maintains a proper
air chamber at the top of the unit allowing
maximum performance of the vent valve.

VDFMA122 © Danfoss 05/09

1

Data sheet

DBC
Air Eliminators
For Heating and Cooling Systems

System Connections:

Servicing:

Service Connections:

Ordering Information:

Size Connection

3/4” to 2” FNPT

2-1/2” to 4” ANSI Flange

The construction of DBC air eliminator allows
maintenance and cleaning without removal of
eliminator from the system. Brass models allow

Feature Size

Drain Plug (Models 3/4” - 2”) 1/2”

Drain Plug (Models 2-1/2” - 4) 1”

Purge Connection (Models 2-1/2” - 4”) 3/8”

Removable Vent (All Models)

Code Size Connections

551045DNF 3/4” NPT

551046DNF 1” NPT

551047DNF 1-1/4” NPT

551048DNF 1-1/2” NPT

551049DNF 2” NPT

551060DNF 2-1/2” ANSI Flange

551080DNF 3” ANSI Flange

551100DNF 4” ANSI Flange

for complete access to working internals. Steel
units allow access to vent assembly and blow
down valve for internal flushing.

Installation:

Preferred Location of
Separator:

Air Separator:

2

Orientation

DBC air eliminators are designed to be installed
with the float chamber in the vertical position.

Heating

Upstream of the circulator (Suction Side), down­stream of the boiler. (ie: highest temperature,
lowest pressure)

Lattice Matrix Material Stainless Steel - All Models

Removable Lattice Brass Models Only

Rapid Manual Venting Ball valve on 2-1/2” to 4” models

VDFMA122 © Danfoss 05/09

Cooling

Upstream of the circulator (Suction Side) and
chiller (Return Side). (ie: highest temperature,
lowest pressure)