Technology in today’s boiler design has caused a change in system set-up. An ever-increasing number of high efficiency boilers are currently designed to run with positive pressure, both in the fire box area, as well as the breech. In pressure fired applications, one of two air tube flange configurations must be used. The preferred method is to use a welded air tube flange. This will have the insertion depth pre-set and the bolt pattern of the flange will be designed especially for a specific boiler.

If the welded air tube flange is not available a universal pressurized flange is the second option. This pressurized flange has holes designed to match a multitude of applications. It is important to note that you must seal around this flange where it attaches to the air tube using high temperature silicone. With the universal pressurized flange you must set the insertion depth. The end of the air tube should be flush to a maximum of ¼ back from the chamber. (Never insert air tube into the chamber.) The following is a partial list of Carlin burner applications where pressurized flanges are a must:

BOILER MFG / MODEL #

BURNER MODEL
AIR TUBE & COMB. HEAD
FLANGE/
GASKET
PUMP PRESS.
(PSI)
MISC.
Burnham
V904, 905 301CRD-PA
8″ B-Style
Press. Flange
150
Press. Augmentor
V906 301CRD-PA
8″ C-Style
Press. Flange
150
Press. Augmentor
V907-911 702CRD
10″ STD.
Press. Flange
100/300
V912 801CRD
10″ STD.
Press. Flange
150
 
Peerless
704,705FDA 301CRD
6″ B-Style
N/A
100
706,710FDA 701CRD
10″ STD.
Press. Flange
150
711-717FDA 801CRD
10″ STD.
Press. Flange
150
718-721FDA 1050FFD
STD.
Press. Flange
100
Use 4″ Spacer
722-724FDA 1150FFD
STD.
Press. Flange
100
Use 4″ Spacer
 
Peerless
J06-J09FDA 201CRD
7″ STD.
N/A
100
J010FDA 301CRD-PA
Special “T”-Style
N/A
100
Press. Augmentor
JOTW75-125 EZ-1HP
5″ EZ-1
Universal
150
JOTW75-175 99FRD
7″ WS
Universal
100
Kit #65524
JOTW200&250 99FRD
7″ STD.
Universal
100
Kit #65516
JOTW275&300 102CRD
7″ B-Style
Universal
100
 
H.B. Smith
19 4-6 301CRD-PA
8″ B-Style
N/A
150
Press. Augmentor
19 7-11 702CRD
10″ STD.
N/A
100/300
19 12 801CRD
10″ STD.
N/A
150
28 4-5 701CRD or 702CRD
10″ STD.
Press. Flange
150 or 100/300
See Below*
28 6-8 801CRD
10″ STD.
Press. Flange
150
28 9-10 1050FFD
STD.
Press. Flange
100
Use 4″ Spacer
28 11-14 1150FFD
STD.
Press. Flange
100
Use 4″ Spacer
New York City Requirement: We Can Only Sell Up To The 28-13!!!
 
Weil McLain
378 EZ-3 HP
7″ EZ-3
N/A
150
H.P.
478 201CRD-PA
7″ STD.
N/A
150
Press. Augmentor
5-6 78 301CRD-PA
6″ C-Style
N/A
150
Press. Augmentor
7-11 78 702CRD
10″ STD.
Press. Flange
100/300
12 78 801CRD
10″ STD.
Press. Flange
150
 
Weil McLain
4-5 88 702CRD
10″ STD.
Press. Flange
100/300
6-8 88 801CRD
10″ STD.
Press. Flange
150
9-10 88 1050FFD
STD.
Press. Flange
100
Use 4″ Spacer
11-14 88 1150FFD
STD.
Press. Flange
100
Use 4″ Spacer

*701 Used Before 702

Any questions you may have as to specific applications can be answered by calling our Technical Hot Line


Technical Hot Line 1-800-989-2275