Combustion Catalog | Fives North American

Optional Pilot Accessories | 4011/4021 Pilot

4041 Universal Pilot Fitting optional (wt. 19.5 oz.)

8666 Testips

See Bulletin 8666 for more detailed information

2 15⁄16

The 8666 Testip facilitates setting air/fuel ratio when premix flames are not easily visible. The Testip is installed in a positive pressure mixture line and lit with a manual torch. Air/gas ratio is adjusted in the mixer until Testip flame seems appropriate. Testips are turned off and removed after the ratio has been set. Since the Testip diverts some of the premix into itself, confirm the pilot ratio is still good after turning it off. Use caution with 8666 Testips they are small burners and get very hot when run. Outdoors, the flame can be difficult to see in direct sunlight.

8790-0 Obs. Port


4 5⁄8

2 7⁄16

3 7⁄8


1 5⁄16

1 5⁄16

A 4041 Fitting is piped between tip and mixer to allow mixer to be installed in a vertical or horizontal line regardless of pilot tip angle. It also takes the place of a union for tip removal, and has an observation port for viewing. Pressure drop across it is negligible .

Allow 6" minimum flame clearance

1⁄8 NPT


4 11⁄16 "

- A purple tinge indicates a lean ratio. - A greenish-blue inner cone denotes a rich fire. - Compare Testip flame with known correct burner ratio setting.

Rotates 360°

Other Pilot Bulletins and Accessories

See product details on bulletins or sheets listed below

Explosion Resistant Assembly (ERA) Igniters 10 mm ERA Igniters for Pilot Tips See Bulletin 4055 for more detailed information

North American Pilot Accessories: 1400 (1486A-02B) Solenoid Valves, Specs, Dimensions 1821B Shutoff Valves 1122 Manual Butterfly Valves for Gas and Air 4031 Pilot Mixer 4065 Ignition Transformers 4074 Push Button Ignition Station 4085 Ignition Cable

The 4055-X-ERA 10mm igniter is intended to ignite pilot tips in Class 1 Div. 2 applications. It has a ¾ "-20 threaded igniter connection for sealed aircraft type ignition wiring. Although the wiring method used between the ignition transformer and the spark plug was designed and chosen to be suitable for use in Class 1 Div. 2 hazardous locations, it DOES NOT carry certifications or third party approvals.

Other North American Pilots: 4014 Gas Boosted Pilot Assemblies

4015 Bulletin Gas Pilots (for large burners) 4018 High Pressure Gas Pilot Specifications 4020 Nozzle-Mix Gas Pilots for Industrial Burners 4027 Pilot Tips ( ¾ " Outlet with ½ " Inlet) 8666 Testips


1 ½ "

Bulletin 4011/4021 Page 6

Made with FlippingBook flipbook maker