CAST IRON BURNER TIPS

 

AN RETENTION BURNER NOZZLESbt-an40.jpg (3780 bytes)

The AN tips are open type nozzles made of cast iron except the steel 15mm tip. These tips have excellent flame retention and high capacities at low gas pressures due to the large port area. All tips have correctly designed piloting retention holes arranged around the main port. Although AN burners are usually employed on low mixture pressures they have the ability to handle high drafts for greater capacities. They are generally used with the SPI inspirators for accurate control and are suitable for most commercially available gasses. If greater capacities with higher mixture pressures are required, the FR tips would be more appropriate. As they are open nozzles, adequate secondary air must be available around the tip to complete combustion.

ADVANTAGES

  • Cast iron construction
  • Large heat outputs for the pipe size
  • Ability to operate in drafts
  • Good flame retention
ankiln.jpg (14677 bytes)

AN Tips fitted to kiln

APPLICATIONS
  • Ceramic kilns using low pressure gasses
  • Boiler conversions
  • Air heaters
  • Immersion tube heaters
  • General Industrial heating

 

PART
NUMBER

SIZE
(BSPF)

TOTAL PORT
AREA (mm2)

DIMENSIONS (mm)

WEIGHT
kg

APPROX FLAME
LENGTH (mm)

Length Diameter "O" Port

AN15

15mm

152

33

27 12.6

.076

200

AN20

20mm

344

40

40 18.8

.175

250

AN25

25mm

504

44

49 23.6

.268

300

AN32

32mm

851

50

60 31.6

.458

350

AN40

40mm

1107

56

67 36.4

.660

400

AN50

50mm

1856

61

82 47.5

.900

500

AN65

65mm

3268

70

96 63.5

1.430

550

AN80

80mm

3995

80

113 70.4

2.100

700

AN100

100mm

5480

98

150 82.5

5.300

900

 

 

 

 

 

 

 

 

 

 

 

 

Always allow forward flame travel 1 1/2 times flame length.

ANlayout.jpg (9609 bytes)

CAPACITY

Note: The capacity will vary greatly depending on many factors such as the gas type, gas pressure, air/gas mixture or the amount of draw available. The typical atmospheric furnace would have a minimal draw of approx. .01"wc.

PART
NUMBER

CAPACITIES AT VARIOUS INDUCED DRAFTS (Pa/inches WC)

2.5/.01 12.5/.05 25/.1 50/.2 75/.3 100/.4

AN15

8

15

21

28

35

45

AN20

20

42

58

75

93

108

AN25

32

64

95

122

148

174

AN32

48

92

125

160

210

248

AN40

62

121

173

226

274

322

AN50

100

190

258

327

432

505

AN65

145

278

398

517

628

740

AN80

220

415

595

775

940

1100

AN100

305

575

815

1050

1300

1530

FR BURNER NOZZLES

fr40.jpg (5339 bytes)The FR burner tips are premix tips specifically designed to operate on high mixture pressures and would be specified if high gas pressures or air/gas systems are used. They are manufactured from cast iron with the exception of the 15mm and the 20mm tips that are made from steel.
The FR tips have excellent flame retention due to the retention port placement and main port design. They would be matched with the corresponding LPI inspirator or the appropriate SPI inspirator for higher pressure gasses only or with the AP mixing sets for forced air systems. Several tips can be used with a single inspirator or mixer providing basic manifold sizing principles are followed. Careful attention should be given to the venturi throat/burner port area ratio if using an inspirator or the sizing if using aspirators for correct burner operation. Please contact ACS for more information. These burners are open type tips and require secondary air for complete combustion.

ADVANTAGES
  • Cast iron construction
  • Ability to use with high mixture pressures
  • Good turndown characteristics
  • Angled retention holes for superior flame retaining ability
APPLICATIONS 
  • Kilns
  • Industrial furnaces
  • Localised heating
  • Boilers

frtrain.jpg (8718 bytes)

FR Tips fitted to furnace using AP premix system

PART
NUMBER

SIZE
(BSPF)

TOTAL PORT AREA (mm2)

DIMENSIONS (mm)

WEIGHT
KG

APPROX FLAME
LENGTH (mm)

Length Diameter Port diameter

FR15

15mm

76

33

27 7.9

.074

150

FR20

20mm

124

41

34 11.1

.135

220

FR25

25mm

166

44

49 13.1

.340

300

FR32

32mm

366

50

60 20.5

.580

380

FR40

40mm

555

56

67 25.5

.755

450

FR50

50mm

1066

61

82 35.9

1.125

550

FR65

65mm

1403

70

96 41.3

1.840

620

FR80

80mm

1817

80

113 47.1

2.965

800

FR100

100mm

3692

98

150 67.3

6.000

1000

 

 

 

 

 

 

 

 

 

 

 

 

CAPACITY

PART NUMBER

CAPACITY AT VARIOUS MIXTURE PRESSURES (kPa/inches WC)

.25/1 .75/3 1.5/6 2.25/9 3/12 4.5/18

FR15

10

20

35

50

60

75

FR20

25

45

60

75

85

110

FR25

40

70

100

125

140

175

FR32

90

155

220

270

310

380

FR40

140

240

350

430

485

600

FR50

250

420

600

740

860

1050

FR65

340

575

820

1010

1140

1400

FR80

440

740

1000

1250

1400

1800

FR100

720

1200

1800

2200

2650

3200

All capacities are given in MJ/HOUR. A typical premix burner operating on an air/gas mixing set would develop approx. .75-1 kPa of mixture pressure.

PN PACKAGED BURNER NOZZLES

The PN packaged burner nozzles are modified FR burner tips that incorporate several features. The burners are equipped with a spark igniter, pilot gas connection, pilot gas tube and pilot gas valve. A flame sensing electrode can be added to the PN burner if required, please add PNFR to your order. The capacities and dimensions are the same as the equivalent FR tip.

APPLICATIONS

PART NUMBER

SIZE (BSPF)

PN50

50mm

PN65

65mm

PN80

80mm

PN100

100mm

pntip.jpg (8826 bytes)

 

INSTALLATION OF BURNER NOZZLES

frinstall.jpg (9955 bytes)The diagram shows the appropriate mounting position for the FR and AN burner tips. Both burners require secondary air to complete combustion and the distance will vary from approx. 6-25mm depending on the draw available.

The opening in the furnace wall should always be slightly larger than the burner tip, this will vary from approx. 6mm to 15mm larger than the burner diameter. The opening for the AN burners will usually be larger than the FR burners due to the extra secondary air required.

 

Click here to go back to Industrial Burner Tips Index.