Combustion Catalog | Fives North American

North American Gas Boosted Pilot Assemblies

Sheet 4014

Ref: Bulletins 4384, 4795, 4796, 6795, 6819 6820, 6821 Supplement 6795-2, Sheets 6795-3, 6796-1, Bul 7350 Bul 7218-7219A, Bul 7344 and Sheet 1400-1

4014 Pilot assemblies consist of: - A premix pilot tip

The 4014 is a gas boosted pilot assembly. It is intended to light large Magna-Flame style burners (3 to 75+ million Btu/h HHV) with 1 ¼ " to 2 ½ " pilot connections. The pilot assembly features a central raw gas jet that is added to a conventional pilot air/ gas premix nozzle to increase the size of the pilot flame. This provides sufficient signal strength for a UV flame detector attached to the burner. Although a pilot without the raw gas boost would light the burner reliably, adding boost gas makes the pilot flame longer and wider. Satisfying the UV flame detector proves the pilot flame is adequate for main burner ignition. For conventional industrial burners with pilot ignition, an interrupted pilot is a safety prerequisite on all applications that use flame supervision.

- A standard 10 mm spark plug (packaged separately) - Aspirator mixer with a built-in gas limiting orifice valve - Boost gas tube, with a limiting orifice and shut off valve to control the boost gas flow to the pilot nozzle. A pilot regulator to control air/fuel ratio is recommended and ordered separately. It must be cross-connected to pilot air pressure. A main gas shut off valve, and an air adjustment valve are also recommended options. See the pilot accessories section on the last page of the bulletin. It is important to maintain the relative positions of the raw gas boost tube, and the pilot tip. So, the piping furnished between mixer and pilot tip cannot be changed.

The 4014 can be used with natural gas, propane or other clean gases (800 Btu/ft3 or more),

Used on Magna-Flame ™ Burners

6795 6796 6820 6821

4384 4795 4796 4819

4820 4821 5795 5796

4014-4-T prepared for shipping

Pilot Air and Gas Capacities

Air flow with

Maximum

Mixture pressure

Flame

Pilot

6 osi/10.4"w.c. (26 mbar)

natural gas flow

length#

assembly

mixer air pressure

(premix gas + boost)

(mixer outlet) "w.c. (mbar)

range

designation 4014-1-T 4014-2-T 4014-3-AT 4014-3-BT

scfh (Nm 3 /h) 640 (18.1) 640 (25.5) 1510 (42.8) 1750 (49.6) 2760 (78.2)

scfh (Nm 3 /h) 146 (4.1) 234 (6.6) 314 (8.9) 765 (21.6) 860 (24.3)

inches (mm)

2.1 (5.2) 2.9 (7.2)

6 - 20 (150-500) 7 - 26 (180-650) 9 - 32 (230-800) 11 - 40 (280-1000) 12 - 46 (300-1150)

4.8 (11.9) 8.2 (20.4) 6.0 (14.9)

4014-4-T

# Flame lengths are highly dependent on local conditions inside the burner, premix air/fuel ratio and how much boost gas is used.

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