Bulletin 4011/4021

Page 5

4041 Universal Pilot Fitting

optional          (wt. 19.5 oz.)

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

.

4

5⁄8

8790-0

Obs. Port

¾  

 

NPT

3

7⁄8

1

5⁄16

1

5⁄16

¾  

 

NPT

2

7⁄16

2

15⁄16

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 DO ES 
NOT carry certifi cations or third party approvals.

The 8666 Testip facilitates setting air/fuel ratio when premix 
fl ames 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 fl ame seems appropriate. 

Testips are turned off  and removed aft er the ratio has been set. 
Since the Testip diverts some of the premix into itself, confi rm the 
pilot ratio is still good aft er turning it off .

Use caution with 8666 Testips they are small burners and get 
very hot when run. Outdoors, the fl ame can be diffi

  cult to see in 

direct sunlight. Testips will not work in systems that operate with 
negative mixture pressure.

Explosion Resistant Assembly (ERA) Igniters

10 mm ERA Igniters for Pilot Tips

See Bulletin 4055 for more detailed information

See Bulletin 8666 for more detailed information

See product details on bulletins or sheets listed below

8666 Testips

Other Pilot Bulletins and Accessories

4"

1

½  

"

- A purple tinge indicates a lean ratio.
- A greenish-blue inner cone denotes a rich fi re.
- Compare Testip fl ame with known correct burner ratio setting.

Rotates 360°

4

11⁄16

"

1⁄8 

NPT

5⁄8

Allow 6"

minimum

fl ame clearance

North American Pilot Accessories:

1400 

(1486A-02B) Solenoid Valves, Specs, Dimensions

1821B Shutoff  Valves
1122 Manual 

Butterfl y Valves for Gas and Air

4031 Pilot 

Mixer

4065 Ignition 

Transformers

4074 

Push Button Ignition Station

4085 Ignition 

Cable

Other North American Pilots:

4014 

Gas Boosted Pilot Assemblies

4015 

Bulletin Gas Pilots (for large burners)

4018 

High Pressure Gas Pilot Specifi cations

4020 

Nozzle-Mix Gas Pilots for Industrial Burners

4027 

Pilot Tips (

¾  

" Outlet with 

½  

" Inlet)

8666 Testips

Optional Pilot Accessories | 4011/4021 Pilot

Catalog Combustion 2021 - Page 0064

Fives Group
FIVES GROUP
FIVES GROUP-FIVES GROUP-0064-0068

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