®
1
SF-600
MAY
15, 2019
SureFire II
™
Forced Draught
Gas Pilot type
SP-48-NG/PG-FD
Instruction Manual
1. INTRODUCTION
This Instruction Manual contains a description of the type
SureFire II™ SP-48
-
NG/PG
-
FD
gas pilot construction,
operation principle and the instructions for installation, start-up and service, including the industrial health & safety
recommendations.
The
SP-48
-
NG/PG
-
FD-xxx
(
48
mm outer diameter,
NG
- Natural Gas or
PG
- Propane Gas or LPG,
FD
- Forced
Draught) gas pilot is a reliable and effective source of ignition for oil and gas burners.
A sample of Pilot Part Number for Natural gas is “
SP-48-NG-FD-xxx
”, for Propane gas is “
SP-48-PG-FD-xxx
”
where “-xxx” is the insertion length “L” from 0.5 to 3.0 metres (see Appendix 1 – the pilot capacity vs. gas pressure
graphs for Natural gas and Propane). For other Fuel gas types or capacity ranges – see p. 11 Ordering Information
for Special Pilots Part Numbering approach.
The pilot is constructed of high quality materials and each unit is checked and tested before dispatch.
Acquaintance with the following instructions and strict attention to the indications reduce the possibility of
equipment failure to a minimum and ensure safety during normal operation.
2. OPERATION PRINCIPLE AND TECHNICAL SPECIFICATION
Unit construction provides
a stable flame, ignition repeatability, with low demand for combustion and cooling
air. No moving parts ensure long, trouble-free operation with low maintenance costs.
SureFire II™
Pilot
SP-48-
NG/PG
-FD
can operate as an intermittent (light-off), or as a continuous pilot.
FIGURE 1.
Gas pilot type SP-48-
NG/PG
-FD.
Detail B
L
~ 188 mm
~10 mm
Air inlet
3/4" BSP
3
Gas inlet
1/2" BSP
6
- rod gland 1/2"
2
1
4
A
HESI igniter rod
HTI igniter rod
Spark & Sense
C
C
View C-C
Gas inlet 1/2" BSP
Rod mounting
hole with gland
1/2"BSP
Sight port or
mounting hole with
stop plug 1/2"BSP
View A-A
~50 mm
A
Swirler-stabilizer plate
~ 112 mm
Electrical Igniter rod of OD 16mm
(out of the pilot scope)
5
Detail B
Main orifice gas tube
Bleed orifice
2:1
Gas tube
Gas divider with
main gas orifice
Igniter rod mounting bracket
O 48 mm
Main orifice gas tube
HTI igniter rod tip
Spark & Sense
